CITY OF CLEARWATER FLOODPLAIN MANAGEMENT PLAN
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Floodplain Management Plan
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City of Clearwater
Floodplain Management Plan
City Council Approval: October 21, 2004
Resolution No. 04-16
Clearwater City Council
Brian 1. Aungst, Mayor
Frank Hibbard, Vice-Mayor
Hoyt Hamilton
Carlen Petersen
Bill Jonson
City Administration
William B. Horne II, City Manager
Garrison Brumback, Assistant City Manager
Pamela K. Akin, City Attorney
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City Staff
Cynthia Tarapani, AICP, Planning Director
Gina L. Clayton, Long Range Planning Manager, Project Manager
Al Carrier, Assistant Engineering Director
Brian Barker, Stormwater Engineering Manager
Terry Finch, Environmental Engineering Manager
Art Kader, Assistant Parks and Recreation Director
Joe1le Wiley Castelli, Assistant Public Communications Director
Kevin Garriott, Building Official
G .c. Wine, Assistant Fire Chief of Fire Prevention
Planning Committee
Pat Wilson, Chairwoman, Floodplain Property Owner and Resident
Michael Galasso, Floodplain Resident and Lender
Jack Heckert, President of Clearwater Beach Chamber of Commerce
Peter Heer, Floodplain Property Owner and Resident
David MacNamee, President of Clearwater Beach Association
John Mahony, Floodplain Tenant
Scott Warner, Floodplain Business Owner
Doug Williams, President of the Clearwater Neighborhood Coalition
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Consultant Services Provided by:
TBE Group, Inc.
City of Clearwater
Floodplain Management Plan
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Table of Contents
SECTION 1.0 INTRODUCTION....................................................................................... 1
SECTION 2.0 PLANNING PROCESS............................................................................... 3
SECTION 3.0 RISK ASSESSMENT.................................................................................. 5
Identifying Hazards................................................................................................. 10
Profiling Hazard Events.......................................................................................... 11
Assessing Vulnerability..... ...................................................................................... 14
Identifying Assets.................................................................................................... 18
. SECTION 4.0 HAZARD MITIGATION STRATEGy...................................................... 21
Evaluation of Previous Plan's Activities................................................................. 21
Floodplain Regulations............................................................................................ 22
Identification and Analysis of Mitigation Measures ................................................ 23
Implementation of Mitigation Activities................................................................. 42
SECTION 5.0 PLAN MAINTENANCE............................................................................. 49
Monitoring, Evaluation and Updating the Plan........................................................ 49
Implementation through Existing Programs ............................................................ 49
Reference..................................................................................................................... ....... 51
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On-line Resources............................................................................................................... 52
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Floodplain Management Plan
Appendices
Appendix A - Resolution Adopting the Floodplain Management Plan............................... 53
Appendix B - Resolution Appointing the Floodplain Management
Planning Committee.................................................................................... 56
Appendix C - Minutes from Floodplain Management Planning
Committee Meetings.................................................................................... 60
Appendix D - Flood Protection Questionnaire Press Release............................................. 71
Appendix E - Flood Protection Questionnaire Cover Letter ............................................... 73
Appendix F - Flood Protection Questionnaire.................................................................... 75
Appendix G - Flood Protection Questionnaire Results ....................................................... 77
Appendix H - Community Development Code,
Chapter 51 Flood Damage Prevention........................................................ 80
Appendix I - Community Development Code, Art. 4, Div. 13,
Land Clearing and Grubbing........................................................................ 96
Appendix J - Public Works Administration Department's Erosion
and Siltation Control Policy.........................................................................99
Appendix K - Public Works Administration Department's
Stormwater Design Criteria .........................................................................130
Appendix L - Public Works Administration Department's
Stormwater Management System Policy..................................................... 146
Appendix M - Clearwater Comprehensive Plan, Stormwater Subelement.......................... 154
Appendix N - Application for Non-Substantial Damage/
Improvement Review................ ......... ......... ........ .... ........... ................... ...... 161
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Figures
Figure 1.0 - SWFWMD Drainage Basins
Figure 2.0 - Future Land Use Plan Classifications
Figure 3.0 - Contour Lines
Figure 4.0 - FEMA flood Insurance Zones
Figure 5.0 - Creeks, Lakes and Ponds
Figure 6.0 - Hurricane Evacuation Zones
Figure 7.0 - Hurricane Storm Surge Areas
Figure 8.0 - Special Facilities
Figure 9.0 - Repetitive Loss Property
Figure 10.0 - 100-year floodplain Area
Figure 11.0 - Critical Facilities
Figure 12.0 - Lift Stations
Figure 13.0 - Natural Gas Lines
Figure 14.0 - Public and Private Schools
Figure 15.0 - Evacuation Shelters
Figure 16.0 -Stormwater Management Projects
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SECTION 1.0 INTRODUCTION
The City of Clearwater is the second largest city in Pinellas County with 26.1 square
miles and approximately 109,719 residents. Nearly half of the City's land is devoted to
residential use. The City has undergone considerable growth since its incorporation in
1897. Between 1970 and 1990, the City's population increased by 80 percent and the
number of housing units within the City doubled. Since 1990, the City's population has
grown by approximately 10 percent and the number of housing units has grown by
approximately 7.5 percent.
Due to the amount of development constructed within the floodplain, as well as an
increase of stormwater runoff as a result of the overall increase of development since
Clearwater's incorporation, floodplain management has become an important component
in protecting the well-being of the City's people and property. To help decrease the
vulnerability of flood damage for thousands of properties located within the coastal and
floodplain areas, the City actively participates in the Federal Emergency Management
Agency's (FEMA), National Flood Insurance Program's (NFIP), Community Rating
System (CRS).
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Communities that participate in the NFIP adopt and enforce floodplain management
programs in order to reduce future flood damage. In exchange, the NFIP provides
federally backed flood insurance for property owners and renters in the participating
communities. In addition to providing flood insurance and reducing flood damage
through floodplain management regulations, the NFIP identifies and maps the Nation's
floodplains.
The NFIP has been successful in requiring new buildings to be protected from damage by
a 100-year flood. However, flood damage still results from more frequent, less intense,
flooding episodes and from flooding in unmapped areas. Under the Community Rating
System (CRS), there is an incentive for communities to do more than just regulate
construction of new buildings to minimum national standards. The CRS adjusts flood
insurance premiums to reflect community activities that reduce flood damage to existing
buildings, manage development in areas not mapped by the NFIP, protect new buildings
beyond the minimum NFIP protection level, help insurance agents obtain flood data and
help residents obtain flood insurance.
The objective of the CRS is to reward communities that are doing more than meeting the
minimum NFIP requirements to help their citizens prevent or reduce flood losses. The
CRS also provides an incentive for communities to initiate new flood protection
activities. The goal of the CRS is to encourage, by the use of flood insurance premium
adjustments, community and State activities beyond those required by the National Flood
Insurance Program to:
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1. Reduce flood losses, e.g.:
· Protect public health and safety,
· Reduce damage to buildings and contents,
· Prevent increases in flood damage from new construction,
· Reduce the risk of erosion damage, and
· Protect natural and beneficial floodplain functions.
2. Facilitate accurate insurance rating, and
3. Promote the awareness of flood insurance.
Initially, the City submitted a Repetitive Loss Plan to FEMA in 1991 to satisfy the CRS
requirements. On September 21, 2000, the City adopted its Floodplain Management
Plan in accordance with the then existing CRS requirements. Since the adoption of the
Floodplain Management Plan, the CRS criteria have been revised and all communities
participating in the program are required to meet these new requirements.
The purpose of this document is to serve as the City of Clearwater's pre-disaster flood
mitigation plan. The Plan creates a comprehensive strategy for implementing sound
floodplain management activities and was designed in accordance with the 1 a-step
activities promulgated by FEMA's Disaster Mitigation Act 2000 and adopted in Section
510 Floodplain Management Planning of the CRS Coordinator's Manual. The City
Council adopted this Plan by resolution on October 21, 2004 at it regularly scheduled
meeting. See Appendix A for a copy of the resolution.
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SECTION 2.0 PLANNING PROCESS
The City of Clearwater, with assistance from TBE Group, Inc., developed the local
hazard mitigation plan. The Clearwater Engineering Department will be responsible for
the review and implementation of the Plan.
At its June 17, 2004 meeting, the Clearwater City Council gave approval for work to
commence on an update to the City of Clearwater Floodplain Management Plan. The
resolution approving this work identifies that the update will be conducted in accordance
with the FEMA requirements for communities participating in the CRS program. The
resolution approving this action is available in Appendix B. The City Planning
Department staff informed the City Council that this update would be produced in
accordance with the 10-step planning process requirements of the 2002 CRS
Coordinators Manual, as well as the Disaster Mitigation Act of 2000 (44 CFR 201.6).
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Also at the June 17, 2004 meeting, the Clearwater City Council approved the
establishment of a Floodplain Management Planning Committee. The appointed
committee members include floodplain property owners and residents, floodplain
business owners, a Pinellas County Emergency Management staff member, neighborhood
representatives, a Chamber of Commerce representative and a real estate/lending
professional. City staff from the Engineering Department's Environmental and
Stormwater Management Division, Fire and Rescue Department, Development Services
Department, Planning Department, Public Communications Department and Parks and
Recreation Department also participated. The Council appointed committee served as the
review committee for the update to the Floodplain Management Plan, as well as the
evaluation committee. Appendix B exhibits the resolution establishing the Floodplain
Management Planning Committee and lists the members.
In order to develop a plan to address the flooding needs of the City, coordination with
surrounding communities and county, regional, state and federal agencies would be
required. To assist in the understanding of the technical aspects of the Federal
requirements of the 2002 CRS Coordinator's Manual, the City's assigned CRS Specialist
and the Department of Community Affairs (DCA) Bureau of Recovery and Mitigation
staff were contacted. In addition, the Southwest Florida Water Management District
(SWFWMD), the Jacksonville District of the US Army Corps of Engineers, the Tampa
Bay Regional Planning Council (TBRPC), the Pinellas County Office of Emergency
Management and the City of Largo staffs were all contacted to discuss floodplain
management projects in their respective areas.
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The Planning Committee met three times during the creation of this document to provide
technical assistance and review of the planning process/public input portions, the hazard
identification section and the hazard mitigation section. Minutes from these meetings are
available for review in Appendix C. The Planning Committee members also received a
draft copy of this document and provided comments and suggestions prior to its approval.
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In addition, the draft copy and final copy of the document was made available to the
public on the City's web site.
In addition to the efforts to obtain public input mentioned above, the City randomly
selected 1,100 floodplain residents and sent out surveys inquiring about previous flooding
of their properties and neighborhoods. To maximize participation, the survey was posted
on the City's website and a press release (See Appendix D) advertising the survey's
location and purpose was sent to local news agencies. The survey's cover letter is
available in Appendix E and the survey is provided in Appendix F.
The City received 231 surveys in response, of which 224 were completed. The remaining
seven (7) surveys were incomplete. The completed surveys represent a 21 percent
response rate. Of those who responded to the survey, 54 reported past flooding of their
property, while 170 residents indicated they had not incurred past flooding problems.
The majority of those residents who had experienced flooding reported that problems
occurred during un-named storm events and attributed the cause of their flooding to a
combination of factors such as storm sewer back-ups, tidal events and over bank flooding
from nearby creeks and lakes. A large number of respondents (36%) reported that certain
areas within their neighborhood, particularly streets, consistently experienced flooding
during heavy rainfall. Of those who responded to the survey, 145 (65%) had flood
insurance on their properties. However, when asked whether they had ever received
information about protecting their homes and family from flooding, only 88 respondents
(39%) reported that they had received such information. Of these respondents, most
(85%) reported the source of this information was news media and insurance agencies,
with only 22 respondents (25%) reporting the City or other government agencies as the
source of this information. The complete results of the survey are tabulated in Appendix
G.
Feedback provided by the respondents and the Planning Committee proved invaluable to
the development of the plan. The perspective gained from the people living within the
areas affected by flooding conditions, allowed the document to be developed with an
understanding of the practical issues related to flooding.
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SECTION 3.0 RISK ASSESSMENT
The City of Clearwater was incorporated in 1897 at which time the area was important as
a trading post. The City remained a small town with a 1930 population of 7,607 until
after World War II, when the population doubled to 15,581. Similar to the rest of
Florida, Clearwater experienced significant growth after this time.
Garden Memorial Causeway, now referred to as Memorial Causeway, was constructed in
1928 and connected mainland Clearwater with Clearwater Beach. The Causeway
replaced an old wooden bridge and allowed for better access to Clearwater's barrier
islands. In the late 1950's, traffic counts by the Florida State Highway Department
indicated 6.3 million cars annually traveled the roadway.
During the 1950's and 1960's, dredge and fill projects were numerous in Pinellas County
during this time. Clearwater's Island Estates neighborhood was the City's most
prominent fill project located between Clearwater Beach and the mainland. This
neighborhood was described as "Venice-type development for exclusive homes."
Although this neighborhood is located on the waterfront, only one repetitive loss property
has been identified.
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From 1970 to present, Clearwater's population doubled, with most of this growth
occurring between 1970 and 1990. Clearwater has become virtually built out and
experiences growth primarily through relatively small annexations and redevelopment
projects. The beach is a mix of residential and commercial uses and is generally
redeveloped on a parcel-by-parcel basis.
The majority of resources devoted by the City to address stormwater management
deficiencies are aimed at the following four areas: the Coastal Basins, which includes
Clearwater Beach (Sand Key, North and South Clearwater Beach and Island Estates) and
the areas located adjacent to the Tampa Bay and Clearwater Harbor; the Stevenson Creek
drainage basin; the Allen's Creek drainage basin and the Alligator Creek drainage basin.
These four locations receive an increased level of concern, as they contain much of the
City's land area and residential population. Other smaller areas of the City located within
the Bishop Creek, Curlew Creek, Jerry Branch, Lake Tarpon Canal and Mullet Creek
drainage basins also receive stormwater attenuation projects to help alleviate flooding in
those specific areas. See Figure 1.0 for drainage basin areas.
To minimize the loss of life, human suffering, damage to public and private property, and
economic loss, a complete knowledge of how flooding affects the City of Clearwater, and
the resources affected, must be determined. This hazard identification and vulnerability
assessment is a vital component to a citywide floodplain mitigation plan. Through the
information gathered, the City will be better able to determine and prioritize mitigation
initiatives used to prepare for flooding episodes.
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By developing a comprehensive assessment of the City's natural and man-made
resources and providing an analysis of how past flooding episodes affected these
resources, this flood mitigation plan will help to assure that the most beneficial and cost
effective flood mitigation activities are implemented by the City. Future development
potential within the City is illustrated in Figure 2.0, by the Future Land Use Plan map.
These land use categories provide a measurement of the maximum development potential
of current and future land use patterns.
General Description
The City of Clearwater is located in central Pinellas County along the west central coast
of Horida, bordered on the west by the Gulf of Mexico and the Tampa Bay on the east.
The city is bordered by the Cities of Dunedin to the north and Safety Harbor to the east,
the Town of Belleair and the Cities of Belleair Beach and Largo to the south. The City of
Clearwater has a total of 28-miles of coastline.
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Natural Features
The topography of the City of Clearwater can be characterized as nearly level to a gently
sloping terrain with the highest areas centrally located in the study area. High coastal
bluffs and white sandy beaches characterize the shoreline. Low inland areas exist along
the Allen's Creek, Alligator Creek and Stevenson Creek floodplain. Elevations typically
range from Mean Sea Level (m.s.!.) up to lO4-feet at its highest point (See Figure 3.0).
The vegetation is typical of urban land in a subtropical climate zone.
Drainage Basins
The City is divided into twelve drainage basins, of which four drain directly to the Tampa
Bay or the Gulf of Mexico. The lOO-year floodplain is represented in two of these
drainage basins. See Figure 4.0 for an illustration of the Hood Insurance Zones, October
2003. All of the basins are multi-jurisdictional and include unincorporated enclaves. As
these basins span municipal and county boundaries, an increased level of coordination is
required among the government entities involved in mitigation projects.
The Coastal Drainage basin containing Clearwater Beach, Stevenson Creek, Alligator
Creek and Allen's Creek drainage basins are the four largest watersheds in the city. The
three creeks drain an area several miles inland, and under specific conditions, tidewaters
generated at their mouths can inundate the creeks upstream and intensify flooding
episodes. See Figure 5.0 for the locations of creeks, lakes and ponds. In addition, the
Bishop Creek, Curlew Creek, Jerry Branch, Lake Tarpon Canal and Mullet Creek
drainage basins, all located in the northern portion of the City, also function as
stormwater runoff collectors. Refer to Figure 1.0 for drainage basin locations. The
Coastal Basin containing Clearwater Beach, the Stevenson Creek drainage basin and the
Alligator Creek drainage basin will be analyzed thoroughly in the Repetitive Loss
Property section, as these three areas contain repetitive loss structures.
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The Stevenson Creek Watershed, the largest and most urbanized watershed within the
City of Clearwater, drains 6,286-acres of land area in west central Pinellas County; of this
area, 4,057 -acres (65%) are within the Clearwater city limits. Bodies of water located
within the Stevenson Creek Watershed are: Lake Bellevue; Prospect Lake; Lake Lucille;
Crest Lake; and Hibiscus Lake.
At a total
of 5,700-acres, of which 5,100-acres are located within Clearwater, the
Alligator Creek Watershed is the second largest in the region
and most urbanized watershed in the City and includes a
complex basin consisting of four major lakes and seven
tributaries. Alligator Lake and Lake Chautauqua, at 77 -acres
and 50-acres, respectively, are the largest interior water body
features located in the City. The two other main lakes located
in this watershed are: Beckett Lake; and Harbor Lake.
Lake ChautaUQua
The Allen's Creek Watershed is approximately 4,300-acres in area. A total of 2,849-
acres are located within the south-central section of the
City. The majority of land uses located within this basin
are low-density single family residential. The main lakes
located within this watershed are: Venus Lake; Lake
Starcrest; Lake Helen; and Sonny Lake.
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At 923-acres, the Bishop Creek Watershed is the smallest
basin with a portion of its area located within Clearwater.
The basin's land area within the City totals just 295-acres and is located in the northeast
section of the City. Nearly one-third of the basin's land area functions as a school and
the remaining uses are medium-density residential and public/semi-public.
The Curlew Creek Watershed, located in the northern most section of the City, drains
4,146-acres. With 1,417-acres of this watershed located within the City, it contributes to
a significant drainage area for the overall stonnwater management system of the City.
While the majority of land uses located within this drainage basin function as a mixture
of residential density classifications, which vary from low- to high-density, property
fronting US Highway 19 North is classified as commercial and office.
Located in the north-central portion of the City, the Jerry Branch Watershed is located
between the Stevenson Creek, Alligator Creek and Curlew Creek Watersheds. At a total
of 2,336-acres, 1,008 of which are located within the City, the Jerry Branch drainage
basin consists primarily of low- to medium-density residential, with commercial uses
sparsely found along the US Highway 19 and State Road 580 corridors.
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The Lake Tarpon Canal Watershed provides a total drainage area of 1,782-acres for the
northeastern most section of the City and portions of Safety Harbor and Oldsmar. Within
the City of Clearwater, the basin totals 1,008-acres. Much of the area is devoted to low-
density residential, recreation/open space and transportation utility uses.
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At 1,893-acres, the Mullet Creek Watershed provides the neighboring City of Safety
Harbor with a significant area for stormwater retention. However, with just 550-acres of
the drainage basin located within the City of Clearwater, the basin manages a limited
portion of the City's overall stormwater management system. Mostly low-density
residential land uses exist throughout the entire drainage basin, while limited public/semi-
public uses are located throughout and a sparse amount of commercial uses are located
along the McMullen Booth corridor.
In addition to the above basins, four Coastal Basin areas provide direct runoff to the Gulf
of Mexico, Tampa Bay or Safety Harbor. The largest of the Coastal Basins include all of
the area known as Clearwater Beach, 920-acres, as well as the western most portion of
the City's mainland. This western portion includes much of the area included in the
City's Downtown District and Harbor Oaks neighborhood and totals 125-acres in area.
The land uses located in the mainland portion of this basin range from low-density to
high-density residential, recreation/open space, commercial and public/semi-public uses.
The main portion of Clearwater Beach is made-up of two natural barrier islands,
separated by an inlet that provides access to Clearwater Harbor (the Intra-Coastal
Waterway) and the Gulf of Mexico. These two barrier islands
extend approximately six-miles along the Gulf of Mexico and
consist of the areas known as Clearwater Beach and Sand Key.
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Island Estates
In addition to the two barrier islands, the area known as Island
Estates is also included in the basin. This man-made fill island,
created during the 1960's, contains approximately 2lO-acres and
intra-coastal waterfront property consisting of a series of islands and
lO-miles of
peninsulas.
All of these areas are densely populated and almost completely built-out. The land uses
consist of residential properties that vary from single-family and multi-family
condominium and townhomes, hotels and motels, commercial businesses, offices, parks
and outdoor recreation areas, churches and government buildings.
Located along the southeastern section of the City is a second Coastal Basin. This basin,
totaling 2,236-acres in area, provides stormwater retention for various types of land use
in an area approximately east of Highway US 19 and south of State Road 60. The land
use in the basin ranges from low- to high-density residential, recreation/open space,
commercial, office and public/semi-public. While much ofthe basin's elevation does not
exceed 30-feet, a small section in the western most portion rises up to 80-feet.
Two additional Coastal Basins, one located in the northwestern most section of the City
and the other in the northeast area of the City, totaling lO8-acres in area and 295-acres in
area, respectively. Both basins consist primarily of low-density residential uses.
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Climate
The climate in Clearwater is subtropical marine, characterized by long, humid summers
and mild winters. Rainfall is abundant, especially during the summer months. The
annual average rainfall is 51.9 inches, mostly occurring between June and September.
The driest months of the year are April and November. Snowfall in Clearwater is
extremely rare. The maximum-recorded accumulation was two inches in January 1977.
The average annual temperature is 74.1 degrees Fahrenheit. The average high
temperature is 81.7 degrees Fahrenheit, with an average low of 61.6 degrees Fahrenheit.
In the winter months, the normal daily fluctuation in temperatures is from the low 50
degrees Fahrenheit to the low 70 degrees Fahrenheit. ill the summer months, the
temperatures range from the low 70 degrees Fahrenheit to the high 90 degrees Fahrenheit.
The number of freezes recorded at Tampa illternational Airport is an average of 3.3 days
at 32 degrees Fahrenheit or below per year. Due to Clearwater's exposure to the
shoreline, the average number of freezes tends to be less than those recorded in Tampa.
Clearwater has a very active thunderstorm season during the summer months. There is
an average of 85 thunderstorms per year. Most occur during the months of June through
September. The hurricane season extends from June 1 sl through November 30th.
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Population
Clearwater is the second largest city III Pinellas County and has a population of
approximately 109,719 residents. The current population density is 4,203 people per
square mile. The average household size is 2.17 persons per home and the average age of
Clearwater residents is 41.8, with 22 percent of the population over 60 years of age.
Having a population base with 22 percent of the residents over 60 years of age makes it
very important to have an evacuation program in place that considers the mobility
limitations ofthe elderly. See Figure 6.0 for Hurricane Evacuation Level areas.
Housing: and Development
There are 48,449 housing units in the City of Clearwater. Of these units, 57.3 percent
(27,806) are single-family residential, 4.6 percent (2,230) are duplexes, 32.0 percent are
multi-family (15,547) and 5.9 percent (2,866) are mobile homes.
The existing single-family residential character of the City is maintained with
approximately 5,156-acres or 39 percent of the net land devoted to residential uses at a
density not exceeding 7.5 units per acre. Single-family residential uses within the
floodplain total 542-acres (24.2%). Generally, this density is not proposed to change.
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Multi-family residential uses (7.6+ units per acre) occupy 1,980-acres or 15 percent of
the City, of which 222-acres (10%) are located within the floodplain. The majority of
new multi-family residential development and redevelopment projects are occurring on
Clearwater Beach and Downtown Clearwater. Motels located on Clearwater Beach are
undergoing redevelopment to multi-family residential uses on a parcel-by-parcel basis,
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while the redevelopment of Downtown Clearwater is also occurring through infill
projects on a parcel-by-parcel basis. The mainly single-family residential area of north
Clearwater Beach is projected to remain low-density. New development and
redevelopment is being built within the permitted density and reviewed in detail for
consistency with the City's flood mitigation requirements.
All new residential development and redevelopment projects proposed within the
floodplain are required to be constructed to current FEMA requirements, limiting
potential flooding.
Development Constraints
1. Clearwater is surrounded by bodies of water to the east and west and no large
developable land areas to the north or south.
2. Clearwater has experienced a 9.4 percent increase in population growth since
1990, increasing from 98,784 to an estimated 109,719 in 2004.
3. There is limited vacant land within the entire City that is developable (80S-acres
or 4.8%). Within the floodplain, 95-acres (4.2%) of vacant land is available for
development.
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4. Environmentally sensitive lands are designated Preservation and Recreation/Open
Space on the City's Future Land Use Plan Map. Preservation and
Recreation/Open Space future land use designations amount to 36.5 percent of the
floodplain and 13.0 percent of the entire City land area. These designations do
not permit residential or commercial development.
Despite these constraints, future development is still possible. Redevelopment of existing
properties and the annexation of additional properties currently located outside of the
municipal boundaries present future development opportunities for the City.
Transportation
A network of state and local roadways service the City of Clearwater with U.S. Highway
19, Alternate U.S. Highway 19, County Route 1 and County Route 611 providing the
major north/south transportation corridors, while State Route 60, State Road 580 and
State Road 590 provide the major east/west transportation corridors. The City is also
serviced by a number of bus routes operated by PST A, the Pinellas Suncoast Transit
Authority.
Identifying Hazards
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Several hazards have been identified through this Floodplain Management Plan. These
hazards were identified through an extensive process that utilized input from Planning
Committee members, the public, historical City records of disaster declarations and
events, review of the City's Flood Insurance Rate Maps (FIRM's), the City of Clearwater
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Flood Insurance Study, NFIP Repetitive Loss data base, and risk assessments completed
by City, County, State and Federal government agencies.
Based on the data compiled, it was determined that the City of Clearwater is most
vulnerable to the following episodes:
· Tidal Flooding;
· Hurricanes and Tropical Storms; and
. Seasonal Flooding.
While all three of these hazards pose a significant threat to the City's residents,
hurricanes and tropical storms are statistically the least likely to impact the City, but
would result in the most severe amount of damage.
Profiling Hazard Events
.
Flooding in the City of Clearwater results primarily from rain storms, tropical storms and
hurricanes that cause intense rainfall, excessive runoff and tidal surge (and associated
wave action) in coastal areas. Figure 7.0 provides the Hurricane Storm Surge Areas
located within the City. Although somewhat protected from the Gulf of Mexico by the
offshore islands, the coastline at the City is subject to abnormally high storm tides. Not
all storms that pass close to the study area produce extremely high tides. Similarly,
storms that produce extreme conditions in one area may not necessarily produce critical
conditions in other parts of the study area.
Stevenson, Allen's and Alligator Creeks are coastal creeks that drain an area several
miles inland. Under certain conditions, tidewaters generated at the mouths of these
creeks can intrude far upstream. Strong consistent winds
associated with intense rain storms and tidal surges,
which typically accompany hurricanes, can aggravate the
tidal flood situation, particularly in areas where the
secondary drainage system is poorly developed.
Flooding within the southern portion Due largely to heavy seasonal rainfalls and its location
of Stevenson Creek directly on the Gulf of Mexico, the City of Clearwater is
subject to periodic flooding and hurricanes. Storms
passing in the vicinity of the City have produced a number of major floods causing
significant damage. A historical review of the City's records from 1921 to 1972 revealed
how major storm events impacted the City. The following list details these events.
.
· August 31-September 8,1935 "Labor Day Hurricane"
This storm, called the "Labor Day Hurricane," was one of the most severe tropical
disturbances ever recorded. The storm was first located east of Turks Island,
traveled toward the Florida Straits, re-curved across the Florida Keys, and then
passed up the west coast of Florida on a broad re-curve that brought it inland near
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Cedar Key. Along the beach areas from the City of Sarasota northward to
Clearwater Beach, homes were undennined and badly damaged. Mass evacuation
of those areas was accomplished before the storm.
.
September 1-7, 1950 "No-name Hurricane"
This hurricane originated over the western Caribbean Sea; passed northward over
Cuba and the Gulf of Mexico, then moved north-northwestward parallel to the
Florida coastline. It made two loops near Cedar Key, moved inland
southeastward, passed approximately 30 miles north of the City of Tampa, re-
curved, and traveled northward. Pinellas County beach areas sustained heavy
damage, principally from the long duration of high tides and waves that caused
considerable erosion and recession of the shoreline. In turn, that erosion was
responsible for major structural damage along the beaches. This small, but severe
hurricane was also accompanied by intense rainfall. A total of 12.7 inches of rain
in two days was reported in the City of Clearwater.
.
· June 4-14,1966 "Hurricane Alma"
Hurricane Alma originated in the Gulf of Honduras, passed between Dry Tortugas
and Key West, and landed in the Apalachee Bay area, causing variable tides
ranging up to to-feet above normal on the west coast of Florida. Besides
structural damage in west Florida, the mango crop in the southwestern portion of
the state and the grapefruit crop around Pinellas County were severely damaged.
· June 19, 1972 "Hurricane Agnes"
Hurricane Agnes originated on the northeastern tip of the Yucatan Peninsula and
traveled westward. The storm was of large diameter, and, although the center of
this storm passed approximately 150 miles west of the Florida peninsula, it
produced a high, damaging tidal surge. In Pinellas County, tides averaged 3 to 6-
feet above normal in the coastal areas. Beaches and causeways were flooded.
Flooding conditions of extreme magnitude occurred in Tampa Bay and caused an
influx of saltwater through the outlet canal into Lake Tarpon. Damage in Pinellas
County from this storm was estimated at $12.5 million.
A review of the flood insurance claims submitted within the City from 1978 to the
present indicates that the majority of claims resulted from the following four storms
and/or tidal events:
· August 31, 1985 - September 4, 1985 "Hurricane Elena"
Rainfall and high tides over a two-day period resulting in the flooding of 43
homes with insurance.
· September 6, 1988 - September 9, 1988 Stationary Front
Greater than 15 inches of rainfall in a four day period and high tides resulting in
the flooding of 15 homes with insurance.
.
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· March 13, 1993 Winter No Name Storm
Rainfall and a tidal surge resulting in the flooding of 61 homes with insurance, the
worst event in terms of the number of claims.
· October 6, 1996 - October 8, 1996 Tropical Storm Josephine
Rainfall combined with high tides caused flooding in 32 homes with insurance.
The following list exhibits the dates identified by the NFIP that residents submitted flood
insurance claims following heavy rainfall and/or tidal events:
.
Date of Event
· May 4,1978
· May 8,1979
· August 29, 1979
· September 23-29, 1979
· February 8, 1981
· August 20 - 21, 1981
· February 8, 1981
· August 9-10, 1982
· June 18, 1982
· August 18-19,1982
· February 28, 1983
· September 11, 1983
· September 29, 1984
· July 25-26, 1985
· August 31, 1985
· October 31, 1985
· December 31, 1986
· July 2, 1987
· July 20-21, 1987
· September 6, 1988
· November 22-23, 1988
· January 2, 1990
· February 28, 1993
· March 12, 1993
· September 11, 1993
· October 4-5, 1995
· June 2-4, 1995
· July 11, 1995
· July 27, 1995
· October 7, 1996
· June 22-25, 1997
· July 5, 1997
· October 31, 1997
· November 22, 1998
· January 2-3, 1999
.
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Number of Claims
2
3
1
3
1
1
1
1
9
1
1
1
1
1
43
2
1
1
5
15
7
6
1
61
1
5
1
1
1
32
1
1
1
1
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Floodplain Management Plan
· July 15, 2000
· December 9, 2002
5
1
Assessing Vulnerability
An assessment of the existing resources of the City is crucial to identifying the
vulnerabilities of an area. While it is highly important to understand the location and
demographics of the residential population living within the City, an assessment of the
built environment must also be available. A comprehensive assessment will allow the
City to fully understand where floodplain mitigation strategies will most benefit the
City's residents, as well as the built resources that are critical to the welfare and safety of
the residents.
In addition, the assessment needs to provide a description of the areas that are
continuously flooded. Identifying these areas and the structures that are affected by the
repeated flooding will allow the City efficiently utilize the resources available to help
mitigate the impact of repetitive damages that occur to structures during flooding
episodes.
Residential Population
Identifying the existing number of residents living within the floodplain, as well as the
established hurricane evacuation levels, is crucial to the effectiveness of understanding
how to assess the floodplain management needs of the City. It is essential that a coastal
community establish the number and any age limitations of residents living within the
floodplain area to implement a successful mitigation strategy.
The tables below identify the number of residents living within the specified Flood
Insurance Zones, established by FEMA, October 2003 and the Hurricane Evacuation
Levels, Pinellas County Emergency Management, 2004.
Po ulation Livin in Flood Insurance Zones
VE Zone AE Zone A Zone
3,626 17,817 2,329
Total
23,772
Level A
Cate 0 1
8,907
Po ulation Livin in Hurricane Evacuation Levels
Le~B Le~C Le~D Le~E
Cate 0 2 Cate 0 3 Cate 0 4 Cate 0 5
5,982 5,525 5,262 10,829
36,505
Total
Special Facilities Populations
Home to a significant special needs population (22%), comprised primarily of elderly
residents, the City must take special considerations when developing plans relating to
pre-and post-disaster mitigation strategies. The table below illustrates the maximum
capacity of hospitals, nursing homes, assisted living facilities (ALF's), and ambulatory
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service centers (ASC's) located within the City's Hurricane Evacuation Levels. See
Figure 8.0 for Special Facility locations.
S olP If
~peCIa opu a Ion
Level A B C D E No Evac
Hospital 0 300 0 0 0
Nursing 0 0 120 0 0 766
Home
ALF 509 0 0 6 8 848
ASC 0 0 0 0 0 7
Total 509 300 120 6 8 1,621
Areas of Repetitive Loss Properties
Repetitive loss properties are properties that the National Flood Insurance Program
(NFIP) has paid two or more claims of $1,000 or more in any given 10 year period since
1978. Since the inception of the CRS reporting system, 225 repetitive loss flood
insurance claims have been made on 83 properties within the City, amounting to
$4,080,968.32 in flood insurance compensation (NFIP, Repetitive Loss Details by
Community, July 31, 2003). See Figure 9.0 for current repetitive loss property locations
as of July 31,2003.
.
The following section provides an assessment of the reoccurring flood problems and
includes the number of repetitive loss properties, the primary existing land uses and a
description of the area. Clearwater Beach and Stevenson Creek contain the majority of
repetitive loss claims. Alligator Creek has only three repetitive loss properties located
within its basin.
Clearwater Beach
At approximately 920-acres, Clearwater Beach contains almost half (41 %) of the City's
land area located within the 100-year floodplain. The 66 repetitive loss properties located
on Clearwater Beach, eight of which are located on Sand Key and one on Island Estates,
represents 80 percent of the total for the City. Since the
inception of the National Flood Insurance Program, these
66 properties have produced 172 flood insurance claims,
76 percent of the total claims for the City, that have
amounted to $2,943,780.00 in insurance payments.
Land uses within the Clearwater Beach area are residential
and commercial. Many of the commercial facilities are
hotels, motels, restaurants and retail shops catering to the
tourist population. The Island Estates neighborhood and the fingers off Harnden Drive on
Clearwater Beach and Gulf Boulevard along Sand Key were created through fill
activities.
.
Storm outfalls below mean high tide, lower than desirable building finish floor elevations
and the topography of these areas are all contributing factors to the repetitive losses,
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generally caused by tidal flooding. The highest benchmark, 7 A-feet above m.s.!.
NGVD29, on Clearwater Beach is located along the Memorial Causeway at Island Way
in Island Estates.
The beach watershed was first studied and addressed in the 1997 Clearwater Watershed
Action Plan. A high percentage of impervious acreage, increased channelization and a
decreased headwater depressional storage area have contributed to flooding problems,
which are typical of highly developed urban areas.
Stevenson Creek Basin
There are 14 repetitive loss properties located in the Stevenson Creek Basin. Since the
inception of the National Flood Insurance Program, these 14 properties have produced 41
flood insurance claims, which amounted to $311,295.70 in insurance payments.
.
The Stevenson Creek watershed is highly urbanized with less than 10 percent of the land
area undeveloped. The predominant land use in this watershed within Clearwater City
limits is low-density residential particularly east of Stevenson Creek and north of Drew
Street. Land use west of Stevenson Creek and south of
Drew Street is comprised of mixed urban land uses
including low-density residential, high-density residential,
commercial, overnight accommodations, office and
industrial.
The Stevenson Creek basin is shared with the cities of
Dunedin, Largo and Pinellas County. The main lakes
located within the watershed, and limits of the City of
Clearwater, include Lake Bellevue (24-acres), Crest Lake (lO-acres) and Lake Hobart
(12-acres). Lake Bellevue and Crest Lake are adjacent to low-density residential and
recreational uses, while a large area of low-density residential land use surrounds Lake
Hobart.
Stevenson Creek at the Pinellas
Trail
The gently rolling topography of the Stevenson Creek watershed varies in elevation from
zero to 65 feet above mean sea level. Dense development has resulted in extensive
impervious surfaces and very limited amounts of natural stream and floodplains. Most
constructed channels are inadequate for heavy storm runoff and are further restricted by
small bridges and culverts, which frequently cross the creek.
.
Historically, the Stevenson Creek watershed provided examples of many different
habitats found in Florida. The mouth of the creek is estuarine. A weir, constructed at
Palmetto Street along the creek, separates the saltwater portion from the freshwater
portion. South of the weir, the banks are relatively steep and create only a small zone for
wetland vegetation. This extends to Court Street, where the creek runs through the Glen
Oaks Municipal Golf Course. Vertical walls confine the southern end before opening up
into a wider expanse of exotic and nuisance species of vegetation.
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The stream is controlled by a weir at Druid Road and functions as a long linear retention
area south of Druid Road to Jeffords Street. South of Jeffords Street, a significant
amount of aquatic vegetation occurs in the stream way with wetland vegetation confined
to a narrow bank zone in this channelized section. From Lakeview Road and beyond, the
stream channel is confined to a narrow easement and is overgrown with exotic and
nuisance species until the stream is piped underground at Bellevue Boulevard.
Several studies have been conducted on the Stevenson Creek watershed over the last 15
years including two watershed management plans. New projects are implemented as a
result of the latest watershed management plan and as the projects are completed the City
of Clearwater Public Works Administration proactively updates the plan to reflect the
mitigation activities.
Alligator Creek Basin
There are three repetitive loss properties in the Alligator Creek watershed, which have
produced 12 flood insurance claims that have amounted to $825,891.94 in insurance
payments.
.
The Alligator Creek watershed lies within three jurisdictions, including the City of
Clearwater, Pinellas County and the City of Safety Harbor. This is the most urbanized
watershed in the City, with a large industrial area covering the western portion, low-
density residential areas in the central portions and a wide
corridor of commercial land use along U.S. Highway 19 and
Gulf-to Bay Boulevard.
The Alligator Creek watershed is the second largest watershed
within the City of Clearwater and drains approximately 5,691-
acres. Nearly 60 percent of the drainage area is within the
Clearwater City limits. The main stem of Alligator Creek
originates near the intersection of Keene Road and Sunset Point Road on the northern
edge of a large industrial area adjacent to the Clearwater Airpark. There are five defined
tributaries which discharge to the main Alligator Creek channel. The main channel flows
easterly, eventually discharging to Alligator Lake, which in turn discharges into Old
Tampa Bay. Alligator Lake is fitted with a salinity control structure, which prevents
saltwater intrusion into the lake
Alligator Creek
.
Significant lakes within the watershed include Alligator Lake
(80-acres); Lake Chautauqua (50-acres); and Moccasin Lake
(30-acres). Lake Chautauqua discharges into a south flowing
tributary of the main channel. Moccasin Lake is located
almost centrally along the length of the stream at Moccasin
Lake Park. Runoff is received from the surrounding areas
and the lake, as well as two retention ponds which outfall
into a channel and subsequently into the main channel.
Alligator Lake is the most downstream lake in the Alligator
Moccasin Lake
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Creek watershed and receives runoff from the entire upstream portion of the watershed as
well as from local residential runoff.
The topography of Alligator Creek is the most dramatic of Clearwater's basins in that it
contains two relatively large areas within its northern region with elevations over 90 feet,
as well as areas within the eastern region that are just above sea-level. The creek has two
main areas of headwaters within the City; one is located in a topographically high area
north of Lake Chautauqua (90-feet above m.s.1.) and the other is located west of Keene
Road (65-feet above m.s.1.).
Several studies have been performed for the Alligator Creek basin over the past 15 years.
The first of these studies was conducted in 1981 by HDR for Pinellas County as part of a
countywide comprehensive stormwater drainage master plan. The U.S. Army Corp of
Engineers conducted a detailed study in a portion of the basin for the City of Clearwater
in 1989. Most recently in 1997, Parsons Engineering Science, mc. performed the most
comprehensive study for this basin.
There are no repetitive loss properties in the other drainage basins (Bishop Creek, Curlew
Creek, Jerry Branch, Lake Tarpon Canal and Mullet Creek) located within the City.
Identifying Assets
.
Existing Floodplain Land Uses
The City's floodplain is primarily a mix of single-family and multi-family residential
uses, open space/recreation and preservation, with limited commercial and industrial
uses. Residential land uses (36.4%) and land designated as preservation or
recreation/open space (36.5%) account for 1,634-acers (72.9%) of the floodplain.
Much of the City's 100-year floodplain is located along the coastal areas, and at 920-
acres, Clearwater Beach encompasses just less than half of the City's entire floodplain
area. See Figure 10.0 lOO-Year Floodplain Area. Due to the natural beauty and
recreational opportunities offered by the beach, much of the Clearwater Beach area is
utilized for residential and/or tourist purposes.
The existing land use data analysis shows both positive and negative trends. The limited
amount of land utilized for non-residential purposes (22.8%) and the abundant amount of
preservation and recreation/open space land uses (36.5%) within the floodplain shows an
encouraging trend. With approximately one-third of a city's land area located within the
floodplain utilized for residential purposes, the importance of the City's continued
participation in the pre- and post-flood hazard programs offered by the Federal
government and flood mitigation planning at the local, regional and state level is
reinforced.
.
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An analysis of existing floodplain land uses results in the following findings.
1. 13.4 percent (2,240-acres) of the City is located within the 100-year
floodplain.
2. Residentially developed land within the floodplain totals 815-acres (36.4%)
and contains approximately 3,899 dwelling units.
3. Within the floodplain, 819-acres (36.5%) are designated as preservation or
utilized as recreation/open space land uses.
4. Only 511-acres (22.8%) of land area is utilized as commercial, public-semi
public or industrial purposes.
5. 95-acres (4.3%) ofland located within the floodplain is currently vacant.
Existing floodplain land uses are inventoried and summarized in the table below.
Land Use Acres Percent
Single Family 542 24.2%
Multi -Family 222 9.9%
. Mobile Home 51 2.3%
Public-Semi Public 128 5.7%
Commercial 336 15.0%
Industrial 47 2.1%
Recreation/Open Space 403 18.0%
Preservation 416 18.5%
Vacant 95 4.3%
TOTAL 2,240 100%
Annexation Areas
There is approximately 1,300-acres of unincorporated county land located within the
Clearwater's Planning Area, most of which are developed. Only 140-acres of
unincorporated land exists in the floodplain and is not a concentrated area, but rather a
scattered throughout the central portions of the City. Unincorporated land located within
the floodplain exists primarily as low- and medium density single-residential uses.
Clearwater has a voluntary annexation program that encourages properties located within
the Clearwater Planning Area to annex into the City. The annexation program is
governed under the Pinellas County Ordinance 00-63 and Florida Statutes, Chapter 171.
.
Critical Facilities
A critical facility is defined as a facility in either the public or private sector that provides
essential products and services to the general public, is otherwise necessary to preserve
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. the welfare and quality of life in the City, or fulfills important public safety, emergency
response, and/or disaster recovery functions.
The critical facilities identified in the City include storm shelters, hospitals and other
health care facilities; municipal, county, state and federal government buildings; airports;
gas, electric and communication utilities; water and wastewater treatment plants;
hazardous waste sites; and schools. The following list exhibits the figures that reference
each of the critical facilities:
. Figure 11.0, Critical Facilities (Airports; Hospitals; Hazard Materials Storage
Sites; Government Buildings; Wasterwater and Water Treatment Plants)
. Figure 12.0, Lift Stations
. Figure 13.0, Natural Gas Lines
. Figure 14.0, Public and Private Schools
. Figure 15.0, Evacuation Shelters
The following tables exhibits the number, type and replacement cost of the critical
facilities located throughout the entire city, as well as the facilities located within the
floodplain.
Critical Facilities in the City
. TYPE OF FACILITY NUMBER OF FACILITIES REPLACEMENT COST
Communication Tower 65 $1,950,000
Schools (Public/Pri vate) 45 $135,000,000
Hospitals 1 $84,000,000
City Government Buildings 46 $31,043,000
County, State & Federal 23 $27,057,600
Government Buildings
Hazardous Material Storage Site 15 $41,000,000
Total 195 $320,050,600.00
Critical Facilities in the Floodplain
TYPE OF FACILITY NUMBER OF FACILITIES REPLACEMENT COST
Communication Tower 19 $570,000
Schools (PublicIPrivate) 6 $6,974,000
Hospitals 1 $84,000,000
City Government Buildings 19 $16,073,000
County, State & Federal 2 $1,466,600
Government Buildings
Hazardous Material Storage Site 5 $3,398,000
Total 52 $112,481,600.00
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SECTION 4.0 HAZARD MITIGATION STRATEGY
Three departments within the City's administration guide stormwater management. The
Public Works Administration is responsible for the design, construction and maintenance
of public drainage systems. The Planning Department and Development and
Neighborhood Services Department, in conjunction with the Engineering Department, are
responsible for the review and approval of private drainage conveyance and retention. A
Planner within the Planning Department currently serves as the CRS coordinator.
Since its incorporation in the NFIP, the City has been involved with flood control and
prevention of flood damages, and the planning, design and construction of drainage
improvements. Historically, the 1981 Alligator Creek Drainage Basin Study and the
1981 Stevenson Creek Drainage Basin Study, and the subsequent updates, have guided
flood management and built a foundation for implementing mitigation projects.
.
The Clearwater Comprehensive Plan (2001), the Watershed Action Plan (1997), the
Allen's Creek Watershed Management Plan (1996), the Alligator Creek Watershed
Management Plan (1997) and the Stevenson Creek Watershed Management Plan (2001)
have guided recent stormwater management activity. As the projects identified from
these studies are implemented, the plans are updated to include the mitigation activity.
Numerous other supplemental studies have also been completed to address the City's
flood prone areas.
As a result of the planning efforts and mitigation projects identified by the watershed
management plans, the City created the Capital Improvement Stormwater Management
Committee (CISMC) to efficiently address effective stormwater management strategies.
The CISMC, comprised of City representatives from the Engineering, Planning, Public
Service and Public Utilities Departments, regularly convenes to discuss various issues
related to stormwater policy and to address any deficiencies in the City's Stormwater
Management system.
Evaluation of Previous Plan's Activities
Several activities identified through the 2000 version of the Floodplain Management
Plan have been, or are in the process of being implemented. Many of these activities are
continuously updated and are also included in this Plan.
The following is a list of activities and projects identified through
the 2000 Plan that have been completed:
.
· Kapok Land Acquisition and Restoration Analysis
· Prospect Lake Park (Town Pond) Construction
· Moccasin Lake Habitat Improvement Feasibility
· Stevenson Creek Stormwater Retrofit Project
· North Greenwood Neighborhood Stormwater Project
Prospect Lake Park
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On-going activities and projects identified through the 2000 version of the Plan are also
referenced in the "Identification and Analysis of Mitigation Measures" section included
in this Plan.
The City will continue to monitor the progress of these ongoing projects to help alleviate
the impacts of flooding on residents. Current and future projects and activities are also
identified in this Plan.
Floodplain Regulations
The extent of the flood hazard exposure in developed floodplain areas is largely due to
construction below the lOO-year base flood elevation. These properties are referred to as
pre-FIRM because of their construction before the adoption of Flood Insurance Rate
Maps (FIRM) requiring construction above flood elevation.
.
Formal regulation of floodplain development did not occur until 1980 when the Flood
Damage Prevention Ordinance was passed. The Flood Damage Prevention Ordinance
(Appendix H), contained in the Clearwater Community Code, regulates coastal
construction in all areas of special flood hazard, consistent with 161 Florida Statutes and
the National Flood Insurance Program. The Ordinance refers to the Federal Emergency
Management Agency's (FEMA) maps in defining the coastal high hazard area. Special
construction standards are required for new development, substantial improvements and
the facilities that service areas vulnerable to flooding. The standards are intended to
minimize impacts on natural features and allow structures to withstand the effects of a
lOO-year storm. The majority (52) of the 82 repetitive loss properties are located on
north Clearwater Beach, which is entirely residential and primarily constructed prior to
FEMA's current base flood elevation requirements. Base flood elevation requirements
for the North Clearwater Beach area are generally 11 feet NA VD88.
Article 4, Division 13 of the Clealwater Community Development Code provides strict
requirements for the process of land clearing and grubbing (Appendix n. This section
requires that specific procedures are met prior to the issuance of a permit to clear land
within the City.
The Erosion and Siltation Control Policy was implemented in 1984, and amended in
April 2003 (Appendix J). These measures require erosion and siltation control methods
to be employed during construction. This policy includes measures such as land clearing
and grubbing, stabilization of denuded areas, protection and stabilization of soil
stockpiles, protection of existing storm sewer systems and sediment trapping procedures.
.
The Design Criteria for Stormwater Drainage was implemented in 1991 and revised July
2000 (Appendix K). In general, these standards are requirements set by the Southwest
Florida Water Management District and the City of Clearwater Public Works
Administration. This document prevents damage from flooding by reducing peak flows
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of surface water runoff and ensures water quality by managing the concentration of
pollutants entering surface waters.
The City also utilizes a Stormwater Management System Policy 2002 guidance manual
(Appendix L). This manual is intended to provide water policy guidance for the
development and implementation of programs, projects, rules and plans relating to City
water resources. This manual also establishes the policies and goals by the City's
Engineering Department to address floodplain management.
The Tampa Bay Estuary Program (TBEP) was established in 1991 to assist the
community in developing a comprehensive plan to restore and protect Tampa Bay. The
program is part of a national network of 28 estuary programs established under the Clean
Water Act and administered nationally by the U.S. Environmental Protection Agency
(EP A). Local administrative support is provided through the Tampa Bay Regional
Planning Council. Charting the Course - The Comprehensive Conservation and
Management Plan (CCMP) for Tampa Bay, provides strategies to repair and protect the
Tampa Bay ecosystem in the most cost-effective manner and according to the principles
of ecosystem management. Clearwater is a TBEP participant and has created an action
plan to meet the goals of the CCMP.
Identification and Analysis of Mitigation Measures
.
The City of Clearwater has completed and will continue to implement floodplain
management activities that are ongoing, as well as propose new projects. These fall into
the CRS Floodplain Management Activities: planning goals, preventive activities,
property protection, natural resource protection, emergency services, public information
and stormwater management projects. The following activities were identified through
the meetings with the Floodplain Management Planning Committee, meetings with city
staff, the flood protection surveys, coordination with other local, regional and state
agencies and the review of previous City reports and documents. These goals and
activities listed below represent those that would provide the greatest level of hazard
reduction to the City.
Planning Goals
Planning goals appropriate to the Floodplain Management Plan have been adopted as
part of the City of Clearwater's Comprehensive Plan. These community policies have
been implemented, will be implemented, or are ongoing, and are found in the Future
Land Use, Coastal Management, Conservation, Recreation and Open Space,
Intergovernmental Coordination, and Capital Improvement Elements, and the Stormwater
Subelement. The evaluation of these goals is an on-going process and will have a
comprehensive review conducted in 2006 through the City's Evaluation and Appraisal
Report (EAR) process. Selected goals directly associated with the mitigation of flooding
activities and the protection of property from flood episodes are provided below.
.
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A. Future Land Use Element
Policy 1.1.6 All development and/or redevelopment activities in floodways and
floodplains shall be controlled through consistent application of local, state, and
federal regulations, mitigation and management plans, and the permitting process.
Policy 1.1.8 Mitigation plans for alteration of non-jurisdictional wetlands, beach
dunes, swamps, marshes, streams, creeks, one hundred (100) year flood plains, or
lakes shall require not less than a 1: 1 ratio of mitigation land (on- or off-site) as
approved by the Public Works Department and/or City Commission.
Policy 6.1.5 In addition to overall consistency with the City's comprehensive
plan, the proposed location of a new or expanded public education facility of the
Pinellas County School District within one of the land use categories listed in
Policy 6.1.2. shall be reviewed and considered with the following general
criteria:
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1. There are no significant environmental constraints that would preclude
development of public education facilities on the site.
2. The proposed location is well drained and soils are suitable for
development or are adaptable for development and outdoor
educational purposes with drainage improvements.
3. The proposed location is not in conflict with the County's Stormwater
Management Plan and the City's adopted watershed management
plan, if applicable.
4. The proposed location is not in a velocity flood zone or a floodway.
B. Stormwater Subelement (See Appendix M for entire Subelement)
Policy 16.2.3 All stormwater management improvements should seek to meet
applicable goals, guidelines, and regulations established to provide flood
protection and pollution abatement.
16.3 Objective Lower highwater profiles during storm events, as necessary, to
reduce house-flooding occurrences and to lessen the resulting adverse effects on
public health, the natural environment, and public and private property.
Policy 16.3.1 Continue to provide a program of regular maintenance to the
stormwater management system to ensure maximum efficiency and performance.
Ensure that stormwater management plans include measures to remove trash,
sedimentation and other debris which impede flow and incorporate structural and
non-structural measures to reduce or eliminate the discharge of oil, grease, heavy
metals, and other suspended particles into the stormwater management systems.
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Policy 16.3.2 Natural and man-made wetlands shall be considered as a means to
provide stormwater management wherever possible and shall be maintained for
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hydrologic purposes. The efficiency of natural and man-made systems to convey
stormwater runoff shall be protected through the provision of routine water
quality maintenance schedules overseen by city inspections.
Policy 16.3.3 Continue to provide multiple use facilities, such as recreational open
space uses, with open channel stormwater management systems, when
appropriate.
Policy 16.3.4 Development and redevelopment activities shall comply with all
stormwater management design standards and criteria.
Policy 16.3.5 Structural Development shall be prohibited where it is determined
that such development will have an adverse impact on stormwater storage areas,
increase flood prone areas, significantly increase rates of runoff or cause other
unfavorable drainage conditions. Both man-made and natural systems shall be
treated on an equal basis as a sensitive preservation area; no distinction shall be
made between a natural system and a man-made or man altered hydrologic
system.
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Policy 16.3.6 Prohibit new building, development or construction that will result
in building(s) constructed within/or over stormwater retention/detention ponds,
streams or channels. All wetlands, streams, channels, or other hydrologic
features, whether wetlands, ponds or bodies of water having intrinsic hydrologic,
biologic and zoological functions with no distinction made in regard to its status
to whether it is man-made or natural shall be considered for a Preservation Land
Use Plan classification to ensure protection from development.
Policy 16.3.7 Continue active participation and cooperation with the National
Flood Insurance Program and the Federal Emergency Management Agency for
the purpose of recognizing flood prone areas, and establishing abatement
programs that endeavor toward a reduction in damages and losses due to flooding.
Policy 16.3.8 Continue the established requirement of a twenty-five foot setback
from the tops of a bank from all wetlands whether natural or man-made, and
require finished floor elevations in areas adjacent to lakes, bays, creeks, the Gulf
of Mexico, Tampa Bay and Old Tampa Bay, and other flood prone areas.
16.4 Objective Continue the implementation of the most cost effective and
efficient plan to reduce the occurrence of street flooding where safety issues and
traffic problems exist as prioritized and set forth in the Capital Improvement
Element, and listed in the stormwater management plans.
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Policy 16.4.1 Identify areas where inadequate stormwater management easements
exist, and obtain proper access to stormwater management channels, structures
and appurtenances for maintenance purposes.
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Policy 16.4.2 Improve all street stormwater management systems where
deficiencies exist.
17. GOAL DISCHARGES OF STORMWATER SHALL BE MANAGED TO
PROVIDE FLOOD PROTECTION FOR THE CITIZENS OF THE CITY OF
CLEARWATER AND TO PRESERVE, PROTECT, AND ENHANCE THE
WATER QUALITY OF RECEIVING WATERBODIES.
17.1 Objective The protection, restoration and enhancement of water quality
associated with stormwater runoff will be considered a function of the City's
overall storm water management plans.
Policy 17.1.1 The City shall incorporate water quality protection and
enhancement criteria into the City stormwater management plans.
Policy 17.1.2 The use of natural alternatives, the conservation of natural
stormwater management systems, and the protection and improvement of the
quality of receiving waters shall be a goal of the City's stormwater management
plans.
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Policy 17.1.3 Management plans shall continue to be developed on an ongoing
basis for water bodies with known or suspected water quality problems in the City
to include Tampa Bay, Clearwater Harbor, Stevenson Creek, Allen's Creek, and
Alligator Creek.
Policy 17.1.4 The City shall systematically and timely prepare watershed or water
body specific management plans for waterbodies within the City. Such plans
shall include both water quality and flood control considerations and
recommended funding sources.
Policy 17.1.5 The City shall implement all City-approved watershed management
plans.
Policy 17.1.6 All City stormwater management plan projects within watersheds of
The City shall comply with applicable SWIM Plans for that water body or
watershed.
Policy 17.1.7 The City shall continue to coordinate with and supplement the
County's surface water monitoring program.
C. Coastal Management Element
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19.1 Objective Clearwater shall continue to protect beaches and dunes by use of
the State Coastal Construction Control Line as the building and land alteration
setback line for purposes of administering land development ordinances. The
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standard building code, and FEMA and City coastal construction regulations will
continue to govern the structural integrity of new buildings.
19.2 Objective The coastal high hazard areas include areas that have experienced
severe damage or are scientifically predicted to experience damage from storm
surge, waves and erosion. The City shall direct population concentrations away
from known or predicted coastal high hazard areas consistent with the goals,
objectives and policies of the Future Land Use Element in the Clearwater
Comprehensive Plan.
Policy 19.2.1 Clearwater shall continue hazard mitigation by participation in the
National Flood Insurance Program's (NFIP) Community Rating System, Pinellas
County's Local Mitigation Strategy, administration of building and rebuilding
regulations consistent with City and FEMA regulations, prohibition of beach sand
dune alteration, and restriction of development in flood plains.
Policy 19.2.3 The City will encourage natural hazard mitigation actions
recommended by any interagency hazard report that the City deems appropriate.
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Policy 19.2.4 General hazard mitigation will be encouraged to include the
regulation of building practices, floodplains, beach and dune alteration,
stormwater management, sanitary sewer and septic tanks, and land use to reduce
the exposure of human life and public and private property to natural hazards; and
appropriate recommendations from the Pinellas County Local Mitigation
Strategy will be incorporated into the Clearwater Comprehensive Plan.
Policy 19.6.1 Redevelopment proposals and plans shall be reviewed for
compliance with the goals, objectives and policies of the Comprehensive Plan and
other appropriate plans including Beach by Design: A Preliminary Design for
Clearwater Beach and Design Guidelines and the City's NFIP Community Rating
System Floodplain Management Plan.
20.1 Objective The City shall continue to protect coastal wetlands and wildlife
habitat to maintain or increase the acreage or threatened and endangered species
population.
Policy 20.1.1 Restoration and enhancement of disturbed or degraded estuaries
identified by the S.W.1M. program shall be accomplished by strict regulation of
proposed impacts to wetlands and by controls on the operation and installation of
marinas and other water-dependent uses.
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Policy 20.1.2 Development applications shall be reviewed to ensure that proposed
new development or redevelopment will not encroach on or remove wetlands or
beaches. New development and redevelopment shall be guided away from
environmentally sensitive areas and into those most able to withstand impacts.
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Policy 20.1.3 Marina siting criteria shall restrict marinas and related activities
from areas of environmental significance, which include but are not limited to the
north end of Clearwater Beach, grassbeds in Clearwater Harbor, Cooper's Point,
and Clearwater Harbor Spoil Islands 25, Sand Key Park, and the southern edge of
Alligator Lake. Marinas shall only be allowed in these areas with appropriate and
approved mitigation.
Policy 20.1.4 The City shall work toward reducing the existing quantity and
improving the quality of storm water runoff to estuarine and surface water bodies
by ensuring that development and redevelopment adheres to the treatment
standards set forth in State Water Policy, and complies with the retention and
treatment requirements of Chapter 62-25 F.A.c., the Environmental Resource
Permitting Rules 40D-4, 40D-40, 40D-400, F.A.c. of the Southwest Florida
Water Management District (SWFWMD) and with any more stringent local
regulations.
Policy 20.1.5 The City shall proactively pursue and facilitate coordination and
participation in the implementation of the Tampa Bay Estuary Comprehensive
Conservation and Management Plan (CCMP), and related plans, as a means of
achieving mutual local and regional resource management and restoration goals
for Tampa Bay.
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Policy 20.1.6 The City shall permit passive recreation uses in appropriate coastal
areas as identified in the Future Land Use Element of the Comprehensive Plan.
Policy 20.1.7 The City shall coordinate with Pinellas County and other local
governments for water quality monitoring and related program planning.
Policy 20.1.8 Future land uses which are incompatible with the protection and
Conservation of wetlands and wetland functions shall be directed away from
wetlands.
Policy 20.1.9 The type, intensity or density, extent, distribution and location of
allowable Land uses and the types, values, functions, sizes, conditions and
locations of wetlands are land use factors, which shall be considered when
directing incompatible land use away from wetlands.
Policy 20.1.10 Land uses shall be distributed in a manner that minimizes the
effect and impact on wetlands. The protection and conservation of wetlands by
the direction of incompatible land uses away from wetlands shall occur in
combination with other goals, objectives and policies in the comprehensive plan.
Where incompatible land uses are allowed to occur, mitigation shall be considered
as one means to compensate for loss of wetland functions.
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20.2 Objective Clearwater's coastal barriers include both natural resources and a
complex built environment and shall be preserved from encroachment and
development.
Policy 20.2.1 Restoration and enhancement of disturbed or degraded dune and
beach areas shall be implemented with the appropriate methods and quality of
material necessary to enable successful reestablishment.
Policy 20.2.2 The specific and cumulative impacts of development and
redevelopment upon wetlands, water quality, water quantity, wildlife habitat, and
beach and dune systems shall be limited by: strict maintenance of existing setback
requirements, adherence to storm water detention requirements, retaining all
publicly owned natural habitats in their undeveloped state and transfer of
development rights.
20.3 Objective Clearwater Harbor and Tampa Bay are designated Outstanding
Florida Waters and are under a non-degradation rule. Clearwater will continue to
manage stormwater runoff and control erosion during construction to reduce
waterborne sediments. As additional initiatives are approved under the SWIM
program, they will be considered for inclusion in the Community Development
Code.
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Policy 20.3.1 Restoration and enhancement of disturbed or degraded drainage
systems shall be implemented by upstream detention of stormwater, maintenance
of existing drainage channels, widening of bridges, culverts and other stormwater
conveyance structures.
20.4 Objective Clearwater shall seek funding and approval to renourish eroded
beaches on Sand Key and Clearwater Beach when necessary. Restored beach
areas shall be considered public resources seaward of construction setback lines
and shall not be counted as plan density or buildable lot area.
Policy 20.4.1 The City shall seek State funding and approval to enable beach
renourishment when necessary.
21.1 Objective Clearwater shall administer land development regulations to
protect public and private property and human life from the effects of hurricane
winds and flooding.
Policy 21.1.1 The City shall grant building permits in compliance with the rules
of FEMA
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Policy 21.1.2 Post-disaster redevelopment plans of coastal areas shall be designed
to reduce the vulnerability of public and private property and include proper
elevations.
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Policy 21.3.2 The City shall develop operating policies that address post-disaster
redevelopment needs to facilitate permissible reconstruction in a timely manner,
which includes participating in the Pinellas County Local Mitigation Strategy.
Policy 21.5.2 To the maximum extent feasible, sanitary sewer facilities and lift
stations shall be built to resist the infiltration by floodwaters. The hazard
mitigation annex, which covers the wastewater treatment system, shall be
followed in the event of a storm; and Floodplain Management Plan shall be
updated as necessary.
Policy 21.5.3 hnmediate repair and clean-up actions after a storm shall be limited
to removal of debris, and repair of existing primary structures to allow re-
occupancy (repairs to allow re-occupancy shall be considered when damage is
limited to less than fifty percent (50%) of the value of the structure prior to
damage). Long-term repair and redevelopment shall consist of upgrading
structures and accessory facilities to expand habitable space or repair of greater
than fifty percent (50%) of the value of the structure prior to damage. Post-
disaster redevelopment and long-term repair can only be permitted consistent with
the requirements of FEMA and the Florida State Statutes.
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Policy 21.5.4 Damaged infrastructure shall be repaired or rebuilt to minimize the
potential for future damage. Unless the facility is necessary to serve the
population of the coastal zone, consideration shall be given to relocating public
facilities outside the coastal zone.
Policy 21.5.6 Repair and rebuilding of critical facilities such as water facilities,
sewage treatment plants and lift stations, and other utilities damaged in future
storms shall be reconstructed to minimize hurricane vulnerability.
D. Conservation Element
22.2 Objective The City shall continue to protect floodplains, drainage ways, and
all other natural areas having functional hydrological characteristics.
Policy 22.2.1 Any construction in the one hundred (100) year floodplain shall
comply with all requirements and standards of the Federal Emergency
Management Agency of the Federal Flood Insurance Administration, and the
City's building codes.
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Policy 22.2.2 Construction and development actIvItIes in natural drainage
channels shall be prohibited, except for public flood protection projects designed
to correct specifically identified pre-existing flood conditions and for which no
reasonable alternative flood control measures are available; such activities shall
not increase the flood potential for areas outside the project target area, nor shall
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the overall water quality of the affected drainage channels be reduced as a result
ofthe activities.
Policy 22.2.3 The City of Clearwater shall continue to prioritize receiving waters
for the development of specific stormwater management plans in coordination
with Pinellas County.
Policy 22.2.4 Utilize design methods which will trap stormwater sediments before
entering surface waters.
Policy 22.2.5 Cooperate and coordinate activities with the Southwest Florida
Water Management District (SWFWMD) and the Florida Department of
Environmental Protection (FDEP) in the implementation of the Surface Water
Improvement and Management (SWIM) Program.
Policy 22.2.6 Natural filtration techniques and methods such as grassy swales and
natural wetland water storage should be implemented when appropriate to provide
purification of stormwater runoff before entering any surface waters.
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Policy 22.2.7 Transfer of development rights should be implemented to provide
alternatives to development and degradation of wetlands and other natural
resources.
Policy 22.2.8 Protect all natural drainage channels from destruction or any
restriction of their functional use and regulate protection through the Clearwater
Community Development Code: this policy may be waived for any public flood
conditions when it can be demonstrated that: (a) No reasonable alternative flood
control measures are available; (b) The project will not increase the flood
potential for areas outside the project target area; and (c) Overall water quality of
the affected drainage channel will not be reduced as a result of the project.
Policy 22.8.9 Pesticide dealers, auto paint and repair shops, salvage yards, and
other small quantity generators of hazardous waste identified as per Florida State
Law shall provide storage of hazardous products and by products outside of the
elevation of the 25-year flood plain, shall not cause the direct discharge of runoff
from said storage areas into water of the State, and shall have
containment/separation traps of adequate size to prevent any discharge in case of
a spill or accident.
23. GOAL DISCHARGES OF STORMWATER SHALL BE MANAGED TO
PROVIDE FLOOD PROTECTION FOR THE CITIZENS OF THE CITY OF
CLEARWATER AND TO PRESERVE, PROTECT, AND ENHANCE THE
WATER QUALITY OF RECEIVING W A TERBODIES.
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23.1 Objective The City shall continue to protect, improve and enhance surface
waters from stormwater runoff discharging into both interior and coastal surface
waters.
Policy 23.1.1 The City shall incorporate water quality protection and
enhancement criteria into all City stormwater management plans.
Policy 23.1.2 The use of natural alternatives, the conservation of natural drainage
systems, and the protection and improvement of the quality of receiving waters
shall be a goal of the City stormwater management plans.
Policy 23.1.3 A stormwater utility fee or other adequate funding mechanism shall
be continued to provide the necessary funding mechanism to achieve this goal.
Polk)! 23.1.4 The City shall continue to implement a stormwater ordinance
requiring redeveloped sites other than single-family residential areas, to
incorporate water quantity and quality controls consistent with new development
regulations, recognizing that case-by-case limitations may call for partial controls,
off site improvements or payments in lieu of improvements to achieve this goal.
E. Recreation and Open Space Element
Policy 24.4.4 Preserve coastal and interior wetlands, floodways, floodplains and
other environmentally significant areas to protect their aesthetic and
environmental qualities which benefit the City.
Policy 24.4.9 Coordinate recreation planning with other plans concerning water
quality, stormwater management, fish and wildlife management, and
environmental education.
F. Intergovernmental Coordination Element
26.5 Objective Clearwater shall participate on a technical and a policy level in the
preparation, planning, funding, coordination, and implementation of a master
stormwater management plan with other governmental entities, SWFWMD, State
Department of Environmental Protection (DEP) and other affected parties.
Policy 26.5.1 The Public Works Department shall continue to coordinate and
oversee preparation of stormwater management plans.
Policy 26.5.2 Clearwater shall participate in interlocal agreements to implement
and fund stormwater management plan improvements.
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26.6 Objective Clearwater shall coordinate with Pinellas County's Department of
Environmental Management and with the Department of Environmental
Protection to upgrade and maintain air quality.
Policy 26.6.2 Clearwater shall continue and seek to expand, as necessary, joint
use agreements for recreational facilities with the Pinellas County School Board
and other recreation facility providers.
G. Capital Improvements Element
28.2 Objective Management of Clearwater's coastal zone shall limit public
expenditures to those necessary to serve existing and planned development.
Policy 28.2.1 City infrastructure located in coastal high hazard areas shall be
given first priority in receiving renourishment projects, necessary maintenance,
and repair and replacement projects; the coastal high hazard area is determined to
be evacuation level "A" zone for a Category 1 hurricane as delineated by Pinellas
County and the Tampa Bay Regional Planning Council.
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Policy 28.2.2 Damaged infrastructure shall be replaced or rebuilt to minimize the
potential for future damage. Unless the facility is necessary to serve the
population of the coastal zone, consideration shall be given to relocating public
facilities outside the coastal zone.
Policy 28.2.3 Infrastructure damage in coastal high hazard areas during previous
storms was limited to beach and water-dependent uses. Repairs and rebuilding of
sewage treatment plants and lift stations damaged in future storms shall be
conducted with such methods to minimize hurricane vulnerability.
Policy 28.2.4 The following infrastructure improvements shall be specifically
considered as part of the local coastal zone management element for purposes of
consistency with applicable State law: expansion/rebuilding of Memorial
Causeway Bridge and addition of turn lanes; expansion of public park and beach
access facilities; beach renourishment, and addition of sanitary sewer and street
drainage capacities, as needed, to implement water quality objectives. These
improvements are consistent with the local coastal zone management element and
are eligible for State funds, which are now or may become available.
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Policy 28.2.5 Level of service standards will not be the exclusive determinant of
the need for a capital improvement in the coastal high hazard area when a repair,
remodeling, renovation or replacement of an obsolete or worn out facility, as
determined by the City Manager and City Commission, is necessary or when
capital improvements are provided in excess of the standards adopted in this Plan
based upon the following criteria:
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1. The capital improvement does not make financially infeasible any capital
improvement of the same type that is needed to achieve or maintain the standards
for levels of service adopted in this Plan; and
2. The capital improvement does not contradict, limit or substantially change the
goals, objectives and policies of any element of this Plan; and
3. The excess capacity is an integral part of a capital improvement that is needed
to achieve or maintain standards for levels of service; or
4. The excess capacity provides economies of scale making it less expensive than
a comparable amount of capacity if acquired at a later date; or
5. The asset acquired is land that is environmentally sensitive or designated by the
City as necessary for conservation, recreation or protection of coastal high hazard
areas; or
6. The excess capacity is part of a capital project financed by general obligation
bonds approved by referendum.
Preventive Activities
Preventive activities keep flood problems from getting worse by regulating land use and
development through planning, land acquisition and/or regulation.
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Project Ai The City will continue to participate in the Pinellas County Local
Mitigation Strategy. This group meets a minimum of once annually to revaluate
the Strategy originally adopted in 1999 and revised in 2003.
Project A2 The City will assist the Tampa Bay Regional Planning Council and
Pinellas County with Project Impact implementation such as providing property
information data, and other general support activities. Project Impact is the
FEMA mitigation initiative to reduce local vulnerability to natural disasters.
Project A.3 As part of the 2007 EAR-based amendments, the Planning
Department will research amending the Comprehensive Plan to prohibit new
construction of hospitals, nursing homes and convalescent homes in the Coastal
High Hazard Area.
Project A4 As part of the 2007 EAR-based amendments, the Planning
Department will research amending the Comprehensive Plan to prohibit the siting
of new mobile home parks within the Coastal High Hazard Area.
Project A5 The City will pursue the acquisition of land that has a history of
flooding and is an important component to alleviate localized flooding and
flooding in other areas of the City.
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Project A6 The City will continue to support implementation of the Tampa Bay
Estuary Program's Comprehensive Conservation and Management Plan for
Tampa Bay through its projects and activities.
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Project A. 7 As part of the CRS program requirements, City staff and the
appointed Hoodplain Management Planning Committee will conduct a yearly
evaluation of the goals and activities of the Floodplain Management Plan.
Property Protection
Property Protection activities are usually undertaken by property owners on a building-
by-building or parcel basis and are intended to alleviate the damage inflicted by episodes
of flooding.
Project B.l The City will continue to participate in the FEMA Project Impact
program to help reduce the impacts of natural disasters.
Project B.2 The City will continue to provide "Substantial Improvement"
information to property owners in the floodplain (Appendix N). This information
will be updated to reflect changes in regulations as necessary.
Project B.3 The Development Services Department will continue to offer the
public information regarding residential flood protection construction methods.
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Project B.4 The Engineering Department will assist homeowners in obtaining
flood mitigation grants through the Horida Department of Community Affairs.
These grants are available on an annual basis and are given priority to repetitive
loss properties.
Project B.5 The City will continue to utilize the flood complaint handling process
to better address flood issues (Appendix L).
Project B.6 The City shall assist residents in preparing FEMA Hood Mitigation
Assistance (FMA) Grants that offer funding for the elevation and
demolition/rebuild of properties that have been damaged by flooding in the past.
Natural Resource Protection
Natural resource protection activities preserve or restore natural areas or the natural
functions of floodplain and watershed areas (See Figures 1.0 & 4.0)
Project C.l The Parks and Recreation Department will continue to maintain,
protect and manage natural areas that are under the city jurisdiction as open space
and preservation parks.
Project C.2 The City will designate a representative to field concerns regarding
dune reconfiguration or construction. This representative will coordinate directly
with the region's State DEP agent to facilitate the reporting of any prohibited
actions.
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Project C.3 The City will continue to pursue the creation and enhancement of
wetlands that provide compensation for future unavoidable City-incurred wetland
impacts from roadway improvements, drainage improvements and public utility
expansIOns.
Project C.4 The City will continue to provide support to the U.S. Army Corps
of Engineers (USACOE) for the design and implementation of Stevenson Creek
Estuary Restoration Project.
Project C.5 The Stevenson Creek Watershed Management Plan will continue to
be updated as recommended projects are implemented.
Emergency Services
Emergency Services are post-disaster mitigation measures taken during and after flooding
that helps minimize the negative impact on resident's well-being and property.
Project D.l The Emergency Management office will work in conjunction with
other City departments and Pinellas County Emergency Management to update
the City's Emergency Operation Plan as needed.
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Public Information
Public Infonnation activities advise property owners and residents about the hazards of
the floodplain through several means of advertisement and information dissemination.
Project E.l The City will utilize Channel 15, C-VIEW TV, the City of
Clearwater television station, to provide flood mitigation information and
hurricane preparedness information to the public.
Project E.2 The City will continue to provide flood mitigation information to
residents through various City publications and advertisements. These
information mailings will be targeted to repetitive loss properties.
Project E.3 The City will continue to work with neighborhoods experiencing
flooding to provide flood mitigation and procedures information.
Project E.4 The Clearwater Library system, Engineering Department and
Development Services Department will continue to make floodplain information
available to the public.
Project E.5 The City will provide information as necessary to the vanous
hurricane guides regarding flood safety information.
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Project E.6 The City will provide information as necessary to Verizon that
provides natural hazard information induding flood procedures in the telephone
book.
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Project E. 7 The City will provide additional flood information on the City's
Web site at myclearwater.com.
Project E. 8 The City will submit an application for certification as a National
Weather Service StomlReady City.
Stormwater Management Proiects
Stormwater Management Projects (See Figure 16.0) are capital improvement projects
constructed to control flooding, enhance drainage and improve stormwater quality. The
CISMC, comprised of City staff develops and maintains a master list of improvements.
This list is available in the Implementation of Mitigation Measures section of this
document. The following is a list of CISMC projects that will be overseen, or continue to
be overseen by the Public Works Administration.
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Project G.] Kapok Wetland and Hoodplain Restoration
The project included the acquisition of the Friendly Village of Kapok Mobile
Home Park and relocation of approximately 200 mobile home residents out of the
floodplain of Alligator Creek, which was completed in 2003. Hooding of the
mobile home park was recognized for its severity, frequency and number of
affected residents. The phase of the project will include the excavation of the
project site for wetland creation and also provide additional floodplain storage
volume that will serve to attenuate the peak flow rate in the downstream channel.
It will also allow for the resolution of flooding of upstream structures. The
project will re-create approximately 26-acres of land to wetland, create habitat
and provide water quality treatment in addition to providing a recreation and
educational facility.
Project G.2 Alligator Creek Channel G Drainage Improvements
The purpose of the Alligator Creek Channel G Drainage Improvements project is
to alleviate the localized erosion along the channel banks and prevent future
erosion within the project area. Currently erosion is threatening adjacent
structures located within the Fairwood Forest Condominiums. The proposed
project will consist of the construction of a new channel cross-section with gabion
walls and bottom.
The project is estimated to cost approximately $800,000 in construction.
Southwest Horida Water Management District grant for 50 percent funding has
been awarded.
This project is expected to begin construction in December 2004 with completion
in May 2005.
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Project G.3 Glen Oaks Phase I and II Stormwater and Recreation
Improvements
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City of Clearwater
Floodplain Management Plan
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This project consists of two stormwater management areas totaling approximately
17 -acres in size. The completion of this project will allow for the adjustment to
the 100-year floodplain designation. This adjustment will remove 33 structures
(78 dwelling units) from being located within the 100-year floodplain designation
on the FIRM, will create approximately seven acres of vegetated wetland habitat,
and provide water quality treatment for 1, 193-acres of tributary drainage area. In
addition, the project will reduce the rates of downstream creek erosion and
sedimentation.
The project limits consist of the existing 27 -acre Glen Oaks Golf Course parcel
bounded by Betty Lane to the west, Hillcrest A venue to the east, Court Street to
the North, and Druid Road to the South.
The project will serve the dual uses of stormwater management and recreation by
incorporating recreational uses into the overall facility, which will include
approximately six acres of dry uplands.
The design cost for this project has been approved at $649,792 and construction
costs are estimated at $6.3M. The Southwest Florida Water Management District
is cooperatively funding the design and construction of this project.
.
This project is anticipated to begin construction in December 2004 with a
completion date of December 2005.
Project G.4 2004 Pipe Liner and Drainage Improvements
This project involves the rehabilitation of approximately 3,800 linear feet of
various diameter storm pipes and replacement of approximately 3,000 linear feet
of subdrain. This $738,203 project will help stop the settling of land on private
property and city roadways at approximately 30 different areas of the City of
Clearwater.
Project G.5 Lake Bellevue Stormwater Management Project
The Lake Bellevue Stormwater Management Project consists of the expansion of
Lake Bellevue to provide additional flood storage capacity and littoral zone for
water quality improvements. The expansion requires the excavation of an area of
approximately 8 acres of unutilized areas of Ed Wright Park and Ross Norton
Park. This project includes modification of the lake outfall structure to control the
100-year flood discharge, elevating the eastern 400 feet of Dempsey Street, and
construction of a low berm through a portion of the park. The project also
includes the installation of additional 36-inch culverts under the CSX railroad to
remedy the flood protection level of service deficiencies at the adjacent streets.
Completion of this project is expected to remove 17 dwelling units from the 100-
year flood zone.
.
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This design cost for this project has been approved at $266,717 and construction
costs are estimated at $1.8M. A Florida Department of Environmental Protection
Water Advisory Panel Grant (W AP050), has been approved for 50 percent of
design and construction, up to $1 million dollars.
This project is anticipated to begin construction in August 2005 with a completion
date of March 2006.
Project G.6 Momingside Meadows Drainage Improvements
The purpose of the Momingside/Meadows Subdivisions Drainage Improvements
project is to alleviate the localized flooding along the neighborhood roadways and
private properties by sizing the existing collection system for the runoff flow
demand. The proposed project will consist of the removal and replacement of
approximately 2,900 linear feet of corrugated metal pipe with reinforced concrete
pipe. Increased conveyance will be obtained by utilizing a smoother pipe and/or
larger pipe diameter. Within the scope of this project, approximately 700 linear
feet of runoff flow will be removed from the rear lot easements and redirected to
the Flushing Avenue right-of-way.
.
Construction costs are estimated to be $575,000 and will be funded through the
Stormwater Utility Fund. It is anticipated that construction will begin in February
2005 with a completion date of August 2005.
Project G.7 Myrtle A venue Drainage Improvements
These improvements involve the reconstruction of the main north/south arterial
roadway through downtown Clearwater, including the replacement of deteriorated
and undersized storm sewer system, sanitary sewer pipes and potable water lines.
The storm sewer improvements include the construction of a new and much larger
storm sewer trunk line for the Myrtle Avenue corridor. This trunk line will serve
as the outfall for the newly constructed Prospect Lake (Town Pond). This project
will provide flood protection for the street and many businesses along the
corridor. Construction cost is $15 million and it is anticipated to be completed in
Fall of 2005.
Project G.B North Beach Drainage Improvements
This project will provide stormwater improvements at various locations at the
north end of the beach. The work will include the installation of storm grate
inlets, the removal and repair of existing collection and outfall systems. This
project will alleviate home and street flooding. This city contract called for
enlarging over Y2 mile of storm pipe and 40 new storm inlets and manholes. The
locations were at five street ends from Somerset to Gardenia at the Northeast end
of Clearwater Beach. The project cost is $626,432.
.
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Floodplain Management Plan
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Project G.9 Spring Branch Stormwater hnprovements
The improvements will consist of widening approximately 700 feet of the Spring
Branch Channel downstream of King's Highway and constructing of a stormwater
retention treatment pond. The total area of the pond will be approximately 11-
acres and will require acquisition of a 4-acre parcel from the Sunset Point Baptist
Church, and acquisition of approximately 8-10 acres of property from the Pinellas
County Board of Education. These two projects combined will remove 27
structures from the 100-year floodplain, stabilize the conveyance features, provide
treatment and attenuate the runoff in this area of the watershed.
The design and construction estimate of this project is $4,121,360. The City
anticipates design to begin by December 2004, with construction starting in
December 2005 and project completion by December 2006. The Southwest
Florida Water Management District and FDEP are cooperatively funding the land
acquisition, design and construction of this project.
.
Project G.lO Stevenson Creek Estuary Restoration Project
This project will involve the dredging of approximately 196,000 cubic yards of
sediments from the estuary, removal of exotic vegetation and replanting of native
vegetation. The project components will restore habitat, reduce odors associated
with the organic muck, improve area aesthetics, restore dissolved oxygen levels,
and help reestablish the estuary tidal flow and food chain base.
The total project cost is estimated at $7,360,987. Construction is anticipated to
begin by 2009 and completed by 2010. The USACOE is the lead agency on this
project. The Corp will manage this project and pay for 65 percent of the project
costs. The City will be responsible for the remaining 35 percent of the project
cost.
Project G.ll a Alligator Creek hnplementation Projects, Phase II
This watershed management plan makes recommendations to implement projects
that will alleviate flooding and provide improved LOS standards to the areas
within the watershed.
The Alligator Creek hnplementation Projects, Phase II, include the clearing of
Channel A between Belcher Road and N.E. Coachman Road; the widening of
Channel A in two locations, between N.E. Coachman Road and U.S. Highway 19
and between U.S. Highway 19 and Cliff Stephens Park; the replacement of bridge
spans at Old Coachman Road and N.E. Coachman Road; the installation of four
parallel box culverts under U.S. Hwy 19; the installation of larger box culverts at
the entrance road to the solid waste transfer station and the construction of an off-
line treatment pond.
.
These projects are cooperatively funded between the City of Clearwater and
Southwest Florida Water Management District's Pinellas-Anclote River Basin
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Board. The total estimated cost of these projects is $2 million, with the City's
share being $1 million.
Project G.ll b Alligator Creek hnplementation Projects, Channel "B"
Channel "B" is an urban ditch system located east of U.S. Highway 19. It routes
water through Clearwater and discharges it into Alligator Creek, which eventually
discharges into Old Tampa Bay.
The Alligator Creek Channel "B" Improvements include replacing an existing
ditch through the installation of an 8-foot by 5-foot box culvert and constructing
an associated swale system above the culvert. The swale will collect surface
runoff and provide water quality treatment before the runoff enters the culvert
through the inlets. Over the past several years several other improvements have
been made to the channel both upstream and downstream from the project area.
This project, estimated at $520,000, is a cooperatively funded project between
Pinellas County and the Southwest Florida Water Management District's Pinellas-
Anclote River Basin Board. It is proposed that the District will allocate $250,000
to fund this project.
.
Project G.l2 Palmetto Street Drainage hnprovements
This project includes the installation of approximately 1,900 linear feet of 54"
reinforced concrete pipe (RCP) along Palmetto Street between Palm Terrace and
Stevenson Creek. The project will provide flood relief for streets and homes in
the area of the Hibiscus Street Pond. Extensive flooding occurs when the storage
capacity of the Hibiscus Pond is exceeded due to inflows from an existing 54"
RCP culvert from the Highland Avenue drainage system. The existing outfall of
Hibiscus Pond is inadequate to handle the inflows from the Highland A venue
pond. The proposed culvert will divert treated stormwater from the Highland
A venue drainage system directly into Stevenson Creek. Overall, the project will
provide flood relief for two collector roads, two neighborhood streets and two
flood-susceptible private homes. In addition, the project will alleviate yard
flooding for twelve other residential properties, and will provide additional
drainage inlets on Palmetto Street along the project route. By diverting excess
flood flows away from the Hammond Branch, the project can also be expected to
reduce the rate of stream bank erosion within the Hammond Branch channel.
The cost of the design phase of this project was $126,989 and was completed in
June 2003. The construction cost for this project has been approved by the City
Council at $1,993,197 and is anticipated to be complete by December 2004. The
Southwest Florida Water Management District is cooperatively funding the
construction of this project.
.
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Floodplain Management Plan
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Implementation of Mitigation Activities
The City of Clearwater Engineering Department's Stormwater Management Division is
the main entity in charge of implementing and managing the projects and activities that
mitigate the effects of flooding. The division is comprised of 40 staff members that are
separated into two divisions. The Engineering and Management Division consists of
eight employees and is responsible for project planning, project prioritization, project
design, regulatory compliance and private development plan review. The Field
Operations Division consists of 32 employees and is responsible for street sweeping,
pond and ditch maintenance, storm collection maintenance and repair and infrastructure
inspection. The Stormwater Management Division has an annual operating budget of
approximately $1.1 million and manages approximately $6 million per year in capital
improvement projects.
The following table exhibits the list of projects identified by the CISMC. The list
provides the priority of the project established by the committee, with 1.0 being the
highest priority; the Engineering Department staff member selected as project manager;
the project classification type; project location; location's problem; total cost of project;
and the project status. In addition to existing projects, this list also provides the projects
that have been completed since the last floodplain document was approved.
.
As all of the stormwater management projects listed are approved capital improvement
projects, funding has already been identified by City Council.
*For an explanation of the abbreviations and color-coding used, please see below the
table.
.
1.02 ES F-1
Remove 33 structures! 78 dwellin
un~s from 1 OOyr floodplain
$5,400,000
Priority PM Class WS
LOCATION
PROBLEM
TOTAL COST (est.)
STATUS
1.03 ES F-1
$550,000
Preliminary design (on
old for FOOT project
008)
$575,000
ignnicant in-structure flooding and
resu~ of previous s~e development
ignnicant reduction in flood level 0
ervice basin wide
$16,688,000
oncept design being
ompleted to finalize cost
or Council review.
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Remove 8 structures/17 dwelling $2,000,000
n~s from 1 OOyr floodplain
Remove 21 structures/21 dwelling $4,157,360 Pending Competion of
n~s from 100yr floodplain Glen Oaks
1.09 ES F-1 Remove 12 structures from 100 yr $1,690,634 Project 5A
loodplain
1.10 ES F-1 $1,801,913 Project 6B (dependant
upon Glen Oaks) 2007
1.11 ES F-1 Remove 17 structures from 100 yr $2,376,418 Project 1 D 2009
loodplain
1.12 ES F-1 STC P I It St S d' t S Remove 1 structure from 100yr $544,546 n hold
a me 0 . e Imen ump I d I .
00 pain
1.13 ES F-1 STC iIIcrest Ave Overflow Remove 42 structures from 100yr $2,299,109 Project 5D
./ ypass Culvert loodplain
Flagler Dr/CSX Railroad Remove 3 structures from 100yr
1.14 ES F-1 STC orth Swale Improvements loodplain $737,241 In Design
include 1533 Clark St.
1.15 ES F-1 STC umer St Box Culverts Remove 5 structures from 100yr $1,554,761 No Action/Study Needed
Ioodplain
Bermuda Sl/Woodlawn Remove 4 structures from the 100yr
1.16 ES F-1 STC errace Storm Sewer $446,783
Re Iacement loodplain
LOCATION
PROBLEM
TOTAL COST (est.)
STATUS
.
1.20 TF
-3 Pine lias County Jurisdiction
1.21 TF
-4 (see description in WMP)
$350,000
Design w/Parsons
1.22 TF F-1
$1,100,000
Design w/Parsons
1.23 TF F-1 AGC
$40,000
Design w/Parsons
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Priority PM Class WS
LOCATION
PROBLEM TOTAL COST (est.) STATUS
$170,000 Design w/Parsons
$165,000 Design w/Parsons
$675,000 Design w/Parsons
$975,000 Design w/Parsons
$560,000 Pinellas County Road
$100,000
.
1.33 TF F-1 $464,800
1.34 TF F-1 $100,000
1.35 TF F-1 $240,000
1.36 TF F-1 $20,000
1.37 TF F-1 AGC Range RdlBelcher Rd $1,435,000
tormwater Treatment Pond
1.38 TF F-1 hannel B Improvements $330,000
1.39 TF F-1 Projects located in Pinellas County not $295,000
'ncl in $$
1.40 TF F-1 hannel D Improvements $1,817,000
1.41 TF F-1 Projects located in Pinellas County
. 1.42 TF F-1 $700,000
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1.28 TF F-1
1.24 TF F-1
City of Clearwater
Floodplain Management Plan
.
Priority PM Class WS
LOCATION
PROBLEM
TOTAL COST (est.)
STATUS
2.01 ES F-2 $1,755,000
2.02 ES F-2 STC N ~issouri Ave/Palmetto St $486,615 Includes CDS Un~s
Drainage Improvements
2.03 ES F-2 $303,382 No Action
2.04 JK $400,000 0% Design
ajor storm pipe failure imminent an
2.05 ES resent system is undersized an $814,000 Field Inspections
nder homes.
. 2.06 ES F-2 treet Flooding I Water Qual~ $620,000 USACOE working on
Feasibil~ study.
Franklin Street, Lincoln East
2.07 ES F-2 o Stevenson Creek & undersize $281,300 Collection System
iIIcrest west to Stevenson
reek
2.07 pipe w~ major stree $126,000 Collection System
1.44 TF
1.43 TF
IG~~ti; Fairwood Forest Gabion
$575,000
Design w/Parsons
2.09 F-2
$78,000
2.10 TF F-2
Public Meeting in
October
2.12 RJM F-2
pipe w~ major stree
3.00 AC C-1 ~~~ FOEP Compliance
Perm~ non-compliance
$1,008,000
No Action
4.03
F-3 CZ11802-1811ApacheTrail
$78,000
No Action
4.04
F 3 CRC 640 Countryside &
- Enterprise Road (goH course)
$65,000
No Action
.
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Priority PM Class WS
LOCATION
PROBLEM
TOTAL COST (est.)
STATUS
5.01 ES E-1 $831,636
5.02 ES E-1 $1,415,843
5.03 ES E-1 $1,500,000 0% Design, 1/2 by
residents, 1/2 C~
water
6.00 ES WQ-1 STC $7,000,000
Survey complete. CDS
6.01 ES WQ-1 $1,100,000 etail in. Agreement
Istate not yet complete.
6.03 ES WQ-1 $14,300
. IIigator Creek Watershed Pia
6.04 TF roject w~h SWFWMD and Pinella $2,216,000 Project In~iated
ounty .
6.05 WQ-1 causing $900,000
7.00 0-1 $26,000
7.03 JK 0-1 each pump station retrom & new bo $500,000
ulvert outfall
7.04 0-1 each pump station needs retrom $400,000
F-1 houses flood $250,000 ossible property
urchase
$500,000
.
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City of Clearwater
Floodplain Management Plan
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Class
F-1/Structure Flooding
F-21Street Flooding
C-1/Regulatory Compliance
F-3/Bridge Flooding
E-1/Major Erosion
WQ-11 Water Qual~
0.1/0ther
R&R1Repair and/or replace
Project Manager (PM): AC - AI Carrier; TF - Terry Finch; BB - Brian Barker; ES - Elliot
Shoeberg; RJM - Bob Maran
2002
2003
2004
2005
2006
2007
2008
2009
2010
Complete
The following table provides an implementation schedule for the actIvItIes identified
through this Plan. The table includes the project name and reference number provided in
the "Identification and Analysis of Mitigation Measures" section; the department
responsible for implementing the activity; a timetable for completion; and the current
priority of the activity. All of these projects will be funded through the operating budget
of the identified department. Capital improvements to the City's Stormwater
management systems identified are included in the above table and will not be repeated.
CtIVltv eoartment TImetable nontv
Preventive
1. Participate in the Pinellas County Local Planning and
Mitigation Strategy Engineering Annually High
2. Assist with FEMA's Project Impact Program Planning and
Engineering Ongoing High
3. Compo Plan amendment - hospitals, etc. Planning 2007 Low
4. Compo Plan amendment - mobile homes Planning 2007 Low
5. Pursue the acquisition of flood prone land Engineering Ongoing Low
6. Support implementation of TBEP' s CCMP Engineering Ongoing High
7. Re-evaluate the goals and activities of the Aoodplain
Management Plan City wide Annually High
Prooertv Protection
1. Assist with Project Impact homeowner's mitigation
grant program Engineering Ongoing High
2. Provide substantial improvement information Development
Services Ongoing Medium
3. Provide flood proofing information Development
Services Ongoing Medium
4. Assist homeowners in obtaining State flood
mitigation grants Engineering Ongoing Medium
5. Maintain flood complaint handling process Engineering Ongoing Low
6. Assistance with FEMA's FMA grant process Engineering Ongoing High
Natural Resource Protection
1. Maintain, protect and manage the City's natural areas Park and Recreation Ongoing Medium
.
A ..
De
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Activitv Deoartment Timetable Prioritv
2. City representation for dune preservation Engineering 2005 High
3. Re-creation and enhancement of wetland in the
Alligator Creek drainage basin Engineering 2005 Medium
4. Continue support of the USACOE's Stevenson Creek
Estuary Restoration Project Engineering Ongoing Low
5. Updates to the Stevenson Creek Watershed
Management Plan Engineering Ongoing Medium
Emergency Services
1. Update the Emergency Operations Plan City wide Ongoing High
Public Information
1. Utilize C-View to provide information Public Relations Ongoing Medium
2. Flood information in City publication and
advertisements Public Relations Annuall y Medium
3. Continued coordination with flood prone
neighborhoods City wide Annually High
4. Distribute updated information to Library Engineering and
Building As Needed High
5. Provide information to disaster guides Public Relations and
Engineering As Needed Medium
6. Coordinate information with Verizon Public Relations As Needed Low
7. Provide additional flood information on website IT, Engineering and
Public Relations Ongoing High
8. Certification as a NWS StormReady City Engineering and
Emergency Services 2005 Medium
High priority actIVItIes identified though the implementation schedule that are not
currently in affect, will be implemented using the operating budget of the identified City
department. Any goals and activities not immediately implemented will be re-evaluated
by the Planning Committee's annual evaluation of the Plan.
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SECTION 5.0 PLAN MAINTENANCE
Monitoring, Evaluating and Updating the Plan
The City of Clearwater has developed a method to ensure that regular review and update
of the Floodplain Management Plan occurs. The City will designate the existing
Floodplain Management Planning Committee to act as a Floodplain Management Plan
Evaluation Committee. While the existing committee members will be offered the option
of participating on the committee, any changes to the appointees will continue to result in
a quorum of members of local agencies, residents and business owners. The City's
Engineering Department is responsible for contacting committee members and
organizing the annual meeting. The meeting will be held in June of each year and
committee members will be responsible for monitoring and evaluating the progress of the
mitigation strategies in the Plan.
.
The City will review each goal and objective to determine their relevance to changing
situations in the City, as well as changes in County, State or Federal policy to ensure that
the Plan addresses current and expected conditions. The committee will also review the
risk assessment portion of the Plan to determine if this information should be updated or
modified. The parties responsible for the various implementation actions will report on
the status of their projects and will include reports on which processes worked well, any
difficulties encountered, how coordination efforts were proceeding and which strategies
should be revised.
The Engineering Department will then have three months to update and modify the Plan
before submitting it to the Committee members and the CRS Coordinator. If no changes
are necessary, the CRS Coordinator will be given a justification for this determination.
Implementation through Existing Programs
The City of Clearwater currently utilizes comprehensive land use planning, capitol
improvements planning and building codes to guide and regulate development in the
City. After the City officially adopts the Floodplain Management Plan, any newly
identified hazard mitigation strategies will be implemented.
After the adoption of the Floodplain Management Plan, the City will use this document
to continue to address flood hazards in its Comprehensive Plan and land use regulations.
The City's Planning Department will conduct periodic reviews of the Comprehensive
Plan and land use policies, analyze any plan amendments and implement these
requirements. The capitol improvement planning that occurs in the future will also
contribute to the goals of the Floodplain Management Plan.
.
The City's Development Services Department is responsible for administering the
building code throughout the City. After the adoption of the Floodplain Management
Plan, the Building Department will work with the State Building Code Office to ensure
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that the City enforces the new building code. This is to ensure that all new construction
in the City meets the identified requirements to limit the effects of flooding.
Copies of the City's Floodplain Management Plan will be catalogued and kept on hand at
all branches of the City's public library. The existence and location of these copies will
be publicized.
In addition, copies of the Plan and any proposed changes will be posted on the City's
Government website. This site will also contain contact information and direction on
where to submit comments or concerns.
The annual review meeting of the Floodplain Management Plan Evaluation Committee
will be publicized in the newspaper and will be open to the public. The meeting will
provide the public a forum for which they can express concerns, opinions or ideas about
the Plan. The Engineering Department will publicize, host and mediate this meeting.
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References
"Alligator Creek Watershed Management Plan", City of Clearwater, July 1999.
"Clearwater Comprehensive Plan ", City of Clearwater, July 2001.
"CRS Coordinator's Manual", Federal Emergency Management Agency, National Flood
Insurance Program, Community Rating System, February 2002.
"Erosion and Siltation Control Policy", City of Clearwater, April 2003.
"Example Plans", Federal Emergency Management Agency, National Flood Insurance
Program, Community Rating System, March 2003.
"Flood Insurance Rate Maps, City of Clearwater, Community Number 125096", Federal
Emergency Management Agency, National Flood Insurance Program, October 2003.
"Flood Insurance Study, City of Clearwater", Federal Emergency Management Agency,
August 1991.
"Floodplain Management Plan", City of Clearwater, September 2001.
"Pinellas County Local Mitigation Strategy", Tampa Bay Regional Planning Council,
December 2003.
"The Local Mitigation Strategy: A Guidebookfor Cities and Counties", Florida
Department of Community Affairs, January 1999.
"NO ADVERSE IMPACT: A Toolkit For Common Sense Floodplain Management",
Association of State Floodplain Managers, September 2003.
"Repetitive Loss Detail by Community Report", Federal Emergency Management
Agency, National Flood Insurance Program, Community Rating System, July 31, 2003.
"STATE AND LOCAL MlTIGATION PLANNING how-to-guide: Getting Started",
Federal Emergency Management Agency, September 2002.
"STATE AND LOCAL MlTIGATION PLANNlNG how-to-guide: Developing the
Mitigation Plan", Federal Emergency Management Agency, April 2003.
"STATE AND LOCAL MITIGATION PLANNING how-to-guide: Understanding Your
Risks", Federal Emergency Management Agency, August 2001.
"State and Local Plan Criteria Under the Disaster Mitigation Act of 2000", Federal
Emergency Management Agency, July, 2002.
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"Stevenson Creek Watershed Management Plan ", City of Clearwater, October 2001.
"Stormwater Management Design Criteria", City of Clearwater, July 2001.
On-line Resources
Association of State Floodplain Managers, http://www.floods.org/home/default.asp
Claritas Corporation, http://www.clusterbigipl.claritas.comlclaritas/Default. isp
Climatic Diagnostics Center, http://www.cdc.noaa.gov/index.html
Department of Community Affairs, Bureau of Recovery and Mitigation,
http://www .floridadisaster .orglbrml
Emergency Management Institute, Community Rating System Resource Center,
http://training.fema.gov/EMIWeb/CRS/index.htm
Federal Emergency Management Agency, http://www .fema. gov/
Federal Emergency Management Agency, Map Service Center,
http://www.msc.fema.gov/
Florida Division of Emergency Management, http://www.floridadisaster.org/
National Climatic Data Center, http://www.ncdc.noaa.gov/oa/ncdc.html
National Oceanic and Atmospheric Administration, http://www.noaa.govlfloods.html
Pinellas County Emergency Management,
http://www.pinellascounty.orglemergency/default.htm
Tampa Bay Regional Planning Council Emergency Management Program,
http://www . tampaba ydisaster. orgl
US Census Bureau, http://www.census.gov/
US Army Corps of Engineers, http://www.usace.army.mil/
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Resolution Adopting the Floodplain Management Plan
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RESOLUTION NO. 04-16
A RESOLUTION ADOPTING THE FLOODPLAIN
MANAGEMENT PLAN; TRANSMITTING THE PLAN TO THE
FEDERAL EMERGENCY MANAGEMENT AGENCY FOR
REVIEW AS REQUIRED BY THE NATIONAL FLOOD
INSURANCE PROGRAM'S COMMUNITY RATING SYSTEM;
AUTHORIZING THE CITY MANAGER TO INITIATE
ACTIVITIES AS RECOMMENDED IN THE FLOODPLAIN
MANAGEMENT PLAN; AND PROVIDING AN EFFECTIVE
DATE.
WHEREAS, the National Flood Insurance Program (NFIP) provides federally
supported flood insurance in communities that regulate development in their floodplains,
and the Community Rating System (CRS) reduces flood insurance premiums in those
communities that do more than implement the minimum regulatory requirements; and
WHEREAS, flood prone neighborhoods in the City of Clearwater have flooded
several times over the past twenty years, resulting in property loss and hazards to public
health and safety; and
WHEREAS, the City Council adopted a Floodplain Management Plan on
September 21,2000, which updated the Repetitive Loss Plan adopted on December 11,
1991; and
WHEREAS, the Floodplain Management Plan updates the 2000 Floodplain
Management Plan in compliance with the 2002 CRS Coordinators Manual; and
WHEREAS, the Floodplain Management Plan planning committee established by
the City Council in Resolution No. 04-15 assisted in the development and review ofthe
Plan; and
WHEREAS, the Floodplain Management Plan as amended is consistent with the
Clearwater's adopted Comprehensive Plan; and
WHEREAS, adopting the Floodplain Management Plan will provide the citizens
of Clearwater access to the Flood Hazard Mitigation Assistance program funds; and
WHEREAS, various City projects, programs, operations and initiatives in the
Plan may lower flood insurance rates for City residents; now, therefore,
BE IT RESOLVED by the City Council of the City of Clearwater, Florida:
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Section 1. The Floodplain Management Plan as amended and attached hereto is
adopted.
Section 2. The Floodplain Management Plan shall be transmitted to the Federal
Emergency Management Agency for appropriate action as required under the National
Flood Insurance Program's Community Rating System.
Section 3. The City Manager is authorized to initiate activities as recommended
in the Floodplain Management Plan.
This resolution shall take effect immediately upon adoption.
PASSED AND ADOPTED
Brian J. Aungst
Mayor-Commissioner
Approved as to form:
Attest:
Leslie Dougall-Sides
Assistant City Attorney
Cynthia E. Goudeau
City Clerk
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Appendix B
Resolution Appointing the Floodplain Management Planning Committee
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RESOLUTION NO. 04-15
A RESOLUTION OF THE CITY OF ClEARWATER,
FlO~DA, APPOINTING THE 2004 Fl~
MAN4GENENT PlAN UPDATE PLANNING COMMITTee:
AND PROVIDING AN EFFEcnvE DATE_
WHEREAS, the ~I floocl IMUI1IACe Program (tlFIP~ ~ fldtrllly
suPPCJl1ld Itood inluJW'lCla ... comrnunItiB& Ihst regul." d.,.~,lI8nt in 1tJ_
floodPl.lns. and the Coonunlty RstMg Syam (CRS) l'Muon flood 1nSUrant$
tlnImiunE in thoee ~.. do ~ '*' ~ the rhnmum I9gUfMOry
~;.nd
.
WHEREAS. a credited ComITl.lnly FbMIng Sytteln (CRS) actMty iB the
prepIII'BIion and ImptementaliOn 01. ~. ~t plBn~ and
WHEREAS. the Ciy of CI88rwatsr ~ the .Fl0odpiain ~ Pfrm...
2000 IInd reGeMId CRS c:rda lor .... PWl: and
WHEREAS, tbI City of CI8erwiMBr iB required to ~ the Roodp#IIfn
~ PMn in 0f08f 10 conlliul eo recIi'I.te CRS Cf*iib for this doaJrnent; and
WHEREAS, th@ Ciy of Clserwalar.... to tubmll an upd..... Fl0odpIain
~nt.Pfsn 10 the Federal ~ ~ Agency b)' Novarooef 1,
2004. and
WHEREAS, the City of elM""" detns 10 eonauct a pf.nning pI'O(:49M that
invoto.oes the ~ ana
WNEReAS. .... City of CIIIarwBtsr dBlllir8llID ......, . ~. l''''~
plan p11W1iJ1g mrm1iII:ee mrnpoaed of ~ pn)perty owners. ~Iidera and
tensnl&. CJIMI8nJ of ~ ~ in .... ~, .nd n&ighboftIood end bu$IneM
representativel!l; now thIf'tIfoN,
Be IT RESOlVED by the City Courd of !he CiIy of ~r. AOOda:
Section 1. The 2OC)4 F~J ,.~ PWl Updat!t ~nnng commlteo
is eetabhehed and c:ont'" of the foIowing t'MI11bera:
Membera oIlhe PuOIIe:
David MscNstnN - ftoodpl8ln ~~'f owner 8I1d I'B8id8nI Md pre.... 01 ...
~~~
PIt, lI.uvfJn - ftoodpiatn properly ~, IrId ...Iid~t
RMokJtm No. 04.'6
.
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~.HHr .1IxqMn properly owner em telident
JoIm JOhony -1toodplaln tenant
I.Ik:hM G,,.saao - ~ mid....1IIf1d lender
DougLtWWsms, pnl$d_ of... ~..... NIigN)oft1ooc1l CoIIiIion
Ja,* HtIcIrMt - PfWIOwi: at the ClBsrwBlBr 8eB:lh Chamber d Commeroe
Scott W4mer . ktodpIaln ~ QrMW
City of ~ SiaIf A4embsr8::
GJrnt t. Cie)fM. Long Ringe ~.liIIfiOMtnIger. Project Manager
AI CMrlef. A8!aIant tnglneer'lIIQ 0Ired0r
Srittrt SItIIW. EnginHf1ng MlInager
T$I'l)I Finch, En\ttl'Oftlnlfttll M8nager
~ Gef'rlcXr. Building ~I
G .c. wn..~ Fn CN8f of Flnt Pnw8ntioo
.kKtlIs. LtWey CesteIN. ~n. PI"lb!1(; ~ ~
Arl K..,.. AsliltUnt PlIrkI .... R8cfWIioo .OnCtDr
_i2fLj,That lie 2004 ~. ~t PfBn t1pd8 Planning
Com ,..t..... ~ the 104&p ...... prooB88 oulned In the 2002 Cornrnunky
Rating SyBIem Cuu.~......8 Mllnull m h Pf'PIIrwtioft of . '** FlOOdptein
Management pt,n for the City or CIeII'ftIet.
Sedion 3. Th.. ttIe 2004 Floodpl8ln ~.nt PIBn will be rmiewed and
appro,*, by ttJe City Council of... CIy of CMiIrwI&r prior to be*1g BUbmhlBd 10 IIlIe
F...... E,,_~tey Management /4,gI1Itcy on Dr before November 1, 2004.
SecItan 4. 'tie reecIuUon M.llta.dect in'lmediateI)' wpon ~.
2
~!wo OoLt!o
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PASSED AND ADOPTEO this l1tb t>>Ii of ~..n. I 2004.
Apprcwod N 10 bm:
~.~~. .WU
Assistanl at)'
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C . E.&udesu
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Appendix C
Minutes from Floodplain Management Planning Committee Meetings
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City of Clearwater
Floodplain Management Planning Committee Minutes
Kick-Off Meeting
5:30 PM Wednesday July 21, 2004
Members Present
Pat Wilson - Chairperson
David MacNamee
Doug Williams
Jack Heckert
Scott Warner
Peter Heer
John Mahony
.
Staff Present
G.c. Wine
Art Kader
Gina Clayton
Terry Finch
Brian Barker
Joelle Castelli
Al Carrier
Consulting Planner
Marc Mariano
The meeting was called to order at 5 :30 PM in Room 130 of the Municipal Services
Building.
Marc Mariano, a consultant preparing the floodplain management document, reminded
everyone in attendance to sign the sign-in sheet.
Members were welcomed to the meeting and again reminded that they were appointed to
this committee by the City Council. Each of the attendees introduced themselves and
provided short background of their profession and where they live within the city.
Marc Mariano began the meeting by providing a brief history of the National Flood
Insurance Program (NFIP). It was identified that this program was established in 1968
for the purpose of floodplain identification and mapping, floodplain management and
flood insurance purposes.
.
A description of the Flood Insurance Rate Maps (FIRM) was then provided and how
FEMA uses the 1 % annual-chance-flood to map the Special Flood Hazard Areas (SFHA).
It was described how this 1 % chance flood, or 100-year flood, has a 26% (1 in 4) chance
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of occurring on these properties over the life of a 30-year mortgage. A definition and
locational description was also provided for each of the flood zone categories and their
locations within the city.
A description of the NFIP's Community Rating System (CRS) program was then
provided to the group. The group was informed that the CRS program is set up to adjust
flood insurance premium rates that reflect a reduced flood risk resulting from community
activities meeting the three goals of the program. These goals, as well as other general
facts about the CRS program were provided.
The group was then informed about why reVISIOns to the City's 2000 Floodplain
Management document are already required and how this document will be different.
This discussion included the revisions to the 2002 CRS Coordinator Manual and how a
high level of public participation and outside agency and community interaction is
required.
.
The group was told that along with floodplain management surveys sent to the residents
living in the SFHA, they would be the main means by which the city obtains public feed
back and ideas, so it is very important for this group to solicit information from their
neighbors, co-workers and friends and family pertaining to flooding issue in Clearwater
and then pass that information along to the consulting planner writing the document or
city staff.
The group was informed that participating in the following tasks would be the main point
of focus:
. Assistiing setting up the floodplain management goals of the City.
. Identifying and selecting mitigation activities and alternatives by
reviewing and offering input into this section of the document.
. Assessing the hazards located within the city by reviewing by
reviewing and offering input into this section of the document.
The committee was also informed that they will need to review the entire final document
before it is sent to the City Council for review.
Discussion regarding a listing of previous flooding episodes ensued and was documented.
The committee was informed that this is the exact type of data that will be included in the
hazard assessment section of the document and they would receive a draft of this
document a week before the next scheduled meeting.
.
Mr. Brian Barker provided a brief summary of the floodplain management projects in
which the Engineering Department is currently involved. This summary referred to
projects in the Glen Oaks section of the city, Lake Belleview and Town Lake. Ms. Terry
Finch, also of the City's Engineering Department, provided a summary of the Kapok
restoration project currently underway in eastern Clearwater.
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Mr. Mariano informed the group that the survey was just sent out to the residents and
offered the questions that were included. Mr. Mariano informed the group that the
purpose of the survey is to obtain feedback from the residents that live in these areas and
have to deal with flooding issues on a regular basis. It was noted that all of the
documented data in the world can be collected, but there will always be issues that are
overlooked and not documented. This is one of the types of data we are attempting to
obtain with this survey.
In addition, the survey will serve as a gauge by which the residents are or are not actively
participating in flood proofing their homes, when they felt the worst flooding episodes
occur and whether or not they receive flood data from any sources.
The committee appointed Ms. Pat Wilson as the Chairperson of the committee.
The next meeting date was scheduled for Wednesday, August 18, 2004. It will be held at
5:30 PM in the same location.
The meeting was adjourned at 7:15 PM.
.
City of Clearwater
Floodplain Management Planning Committee Meeting Minutes
5:30 PM Wednesday August 18, 2004
Members Present
Pat Wilson - Chairperson
David MacNamee
Doug Williams
Jack Heckert
Scott Warner
Peter Heer
John Mahony
Staff Present
Brian Barker
Joelle Castelli
Al Carrier
Consulting Planner
Marc Mariano
The meeting was called to order at 5:35 PM in Room 130 of the Municipal Services
Building.
.
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Marc Mariano, a consultant preparing the floodplain management document, reminded
everyone in attendance to sign the sign in sheet.
Attendees were asked to take out the draft hazard assessment section that they were sent
via email on August 11, 2004. Marc Mariano presented a general review of the hazard
assessment section of the document. This review touched on the most important parts of
the section and helped steer discussion of the draft section, as it may have been several
days since committee members received and reviewed this document.
Following the review, discussion ensued regarding grammatical and content issues that
member felt needed to be addressed. Members agreed that since much of the city land is
located along the Gulf of Mexico, a section should be included in the document the
describes the barrier and fill islands that make up Clearwater Beach. It was noted that
this would be accomplished.
The members discussed a desire to have a brief write-up in the Profiling Hazard Events
section that discusses the impact these hazards have on residential property.
A question was raised as to whether or not Cross Bayou, which originates in Seminole,
was also located within the city limits. After the discussion ended, Brian Barker of the
City Engineering Department clarified that Cross Bayou does not flow into the City.
.
The committee members felt that in the introduction of the document it should be made
clarified what constitutes Clearwater Beach. Mr. Mariano confirmed that it would be
noted in the beginning of the document what is meant when Clearwater Beach is
referenced and that for this documents purpose, unless otherwise noted, Clearwater
Beach will include Sand Key, Island Estates and Clearwater Beach.
Mr. David MacNamee proposed that the City attempt to be classified as a "Storm Ready
City" by FEMA. Mr. MacNamee informed the group that this classification would
provide 25 points toward the CRS classification and that as the County has already met
all of the necessary requirements for this designation that the City would just need to
formally adopt the same standards.
Mr. Mariano presented an overview of the floodplain management survey responses that
were sent to 1,100 residents located within the Special Flood Hazard Areas (SFHA).
Members were informed that over 200 surveys were received and that this amount of
participation is very encouraging. Ms. Castelli, the City's Assistant Director of Public
Communication, informed the group that anything over that is very good. This high rate
of a 10% return shows that the residents are interested in the issue of flooding and desire
information and involvement.
.
It was noted that as the survey deadline had just passed, only a general overview was
available and more definitive data would be included in the document. Mr. Mariano
provided the following details:
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. Most residents reported that flooding occurs through high tides, storm sewer
back-up and saturated ground.
. A negative fact presented by the survey is that most people still report that they
receive most of their flood information from the media and insurance groups.
This was seen as negative since just over a year ago all residents within the flood
hazard areas received brochures about from the City's Planning Department
about flooding issues. It was concluded that mailing are not the best form of
communication and maybe one of the hazard mitigation actions could be to use
the City's TV station, C-View, to show a FEMA approved video on the hazards
of flooding and how to protect your property. This video could be shown a few
times a year and was thought to be very beneficial.
. Most residents reported that most of the heavy flooding of 1 foot or above was
from identified storms.
. The overwhelming majority of respondents have flood insurance. This is very
encouragmg.
. The additional flood insurance measures installed on people's property tend to be
Sump Pumps, waterproof walls and generators.
. A handful of residents feel that dredging of the creeks and waterways could be
better and could help during episodes of heaving rain.
.
During open discussion, the group addressed the issues of requmng preventative
measures to be addressed at the time of new development. It was felt that waterfront
property, especially on the Gulf should implement flood hazard protection measures.
Some members felt that just like the city requires a mitigation plan to address additional
traffic, mitigation strategies could be required to help pay for flood hazard projects.
Some members felt that while these mitigation projects may help, it might be too costly
for development and inhibit redevelopment. It was also noted that, even though dune
stabilization construction projects may be help, there is not much that can be done to
protect residents from flooding along the beach areas except for not living on the beach.
The next meeting date was scheduled for Wednesday, September 15, 2004. It will be
held at 5 :30 PM in the same location.
The meeting was adjourned at 6:50 PM.
City of Clearwater
Floodplain Management Planning Committee Meeting
5:30 PM Wednesday September 15, 2004
.
Members Present
Pat Wilson - Chairperson
David MacNamee
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Doug Williams
Staff Present
Brian Barker
Joelle Castelli
Al Carrier
Gina Clayton
Terry Finch
Art Kader
Consulting Planner
Marc Mariano
The meeting was called to order at 5:40PM in Room 130 of the Municipal Services
Building.
Marc Mariano, a consultant preparing the floodplain management document, reminded
everyone in attendance to sign the sign-in sheet.
Attendees were asked to take out the mitigation strategies section that they were sent via
email on September 9, 2004.
.
Gina Clayton, Long Range Planning Manager, informed the group that much of what is
included in this section comes from the City's Comprehensive Plan and while comments
and suggestions are welcomed, revisions to this portion cannot be done by the consultant.
Any revisions to this section would need to be by done an amendment to the
Comprehensive Plan. Ms. Clayton did indicate that the suggestions for revising this
section are positive because it allows the Planning Department to observe inefficiencies
in the Comprehensive Plan. She noted that all the recommendations would be kept on
file and addressed during the City's EAR process next year.
Mr. Mariano pointed out that while these revisions cannot be included as part of this
version of the floodplain document, it does provide a very good starting point for the
required yearly review of the floodplain document.
.
Attendees were then asked to provide their comments and suggestions on the mitigation
sections. David MacNamee suggested that in some areas of the city like Clearwater
Beach, shell driveways should be permitted in order to allow better drainage of
rain/water. Mr. MacNamee also noted that with the increasing approval of setback
reductions on the beach, the impervious surface on much of the new beach development
and redevelopment is taking up an incredibly large amount of space and leaving little lot
area for pervious surface. His concern is that if the City continues to allow the reduction
of setbacks along the beach area, then drainage will continue to be a problem. He pointed
out that the least that could be done is to allow shell driveway in place of asphalt.
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Pat Wilson added to this topic by suggesting that maybe instead of allowing the shell
driveways a more stringent approach to setback reductions could be taken to preserve
landscaped area.
Several attendees pointed out that Policy 16.3.8 will eventually need to be revised to
include a finished floor elevation height. This height requirement is currently lacking in
the existing Comprehensive Plan.
Mr. MacNamee began discussion on the Coastal Management Section of the
Comprehensi ve Plan by requesting information on what authority is charged with
overseeing dune reconfiguration enforcement on the beaches in areas that are "private"
property. Several months ago, he had witnessed contractors altering a dune in north
Clearwater Beach and did not know whom to contact to see if this was being done
legally. He contacted the City and was informed that this was a state issue and he needed
to contact DEP.
Ms. Terry Finch, Environmental Division Manager, informed Mr. MacNamee that this is
in fact a state enforcement issue and that the inspector that is in charge of our area is out
of Sarasota.
.
Mr. MacNamee did inform Ms. Finch that he was eventually directed to the Sarasota
office, but that he was concerned about the inefficiency of this system. Discussion
ensued about the possibility of having a contact person at the City who could take calls
on dune reconfiguration and either provide a direct contact at DEP or be responsible for
contacting DEP directly to find out if what is being done is legal or not.
Ms. Wilson wanted to know how and when Policy 16.4.1 is done. This policy states that
areas of inadequate stormwater management will be identified. She was concerned that
this seemed a bit opened ended and did not state how this policy is achieve.
Mr. Al Carrier, Assistant Director of Engineering, informed Ms. Vaughn that the City has
a Capital hnprovement Committee (CIC) that meets to identify all of the projects that are
going set to begin and to identify areas of the city that need improvements. Part of this
committee is the Capital hnprovements Stormwater Management Committee (CISMC),
which meets separately and then takes their concerns to the CIC. The CISMC reviews
areas that have been identified as having deficient stormwater management facilities,
comes up with projects to alleviate these deficiencies, and then brings these projects to
the CIC.
Ms. Wilson then suggested Policy 17.1.2 should provide a list of the natural alternatives
that is speaks of. It now only suggests using natural alternatives as a goal of the
stormwater management plans.
.
Ms. Wilson asked if the city has any regulations in place that would provide a basis for
how man-made dunes are created. She asked if there are regulations that need to be
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followed on private and public property. Ms. Finch informed Ms. Wilson that there are
no such regulations as the City is not responsible for any dune locations. The land where
man-made dune production is privately-owned would be possible. This is a state
regulation that the City does not have authority over.
It was discussed that because land ownership is so unclear on North Clearwater Beach, it
is hard to regulate. Some people feel that they own the beach portions, while others think
it is the City or the State.
Mr. MacNamee suggested that Objective 19.2 is out-of-date and should be removed
during revision. This objective addresses the issue of directing density and development
away from the coastal high hazard areas. It was noted by staff that while it is true that the
city cannot tell a property owner they do not have the right to develop their property to
permitted density and that development in the coastal areas increased rapidly, this policy
is very important to have in a comprehensive plan since there are areas of the beach that
exist at low-density. Policy such as these offers terms at which the city can deny a
proposed high-density project to preserve these lower density areas.
.
Mr. Art Kader, Parks and Recreation Assistant Director, pointed out, and it was agreed,
that Policy 22.2.9 should be removed from this Plan as it is outdated and contrary to the
City's plans and will be removed from the comprehensive plan during the revision
period.
Mr. Kader also noted that Policy 26.6.1 is not relevant to this plan and should be
removed. Mr. Mariano informed Mr. Kader that he would look into that.
Ms. Wilson asked if Policy 20.1.7 addressed many of the other policies and could be used
as a catch all, which would allow the other policies to be removed from the plan. Ms.
Clayton indicated that this may be beneficial for the CRS program and Mr. Mariano
informed the committee that this would be reviewed.
Mr. Kader pointed out that Policies 21.5.4 and 21.5.6 need to be evaluated during the
EAR process. He feels the 21.5.4 may be impossible to meet since we have such a large
population in the coastal zones and the 21.5.6 should be re-worded to include the City's
Code and State Building Code.
Mr. Kader offered praise to the Engineering Department's efforts to develop projects that
serve a dual purpose of stormwater management and recreation. This statement is include
in project description G3 and Mr. Kader feels that this should be included in projects G.1,
G.5 and G.ll, as these projects will also provide an incredibly productive mix of
stormwater management and recreation.
Mr. Kader pointed out that the official name of the Town Pond is now Prospect Lake.
.
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Ms. Clayton pointed out that the official name of the Kapok Village Restoration is the
Kapok Wetland and Floodplain Restoration. Ms. Clayton also addressed the need to have
a section of the document that includes what has been completed since the last plan. Mr.
Mariano informed Ms. Clayton that this is in the final draft.
Ms. Wilson suggested that Project Fl include the showing of hurricane preparedness and
how to board up a house on video for public TV. Ms Castelli informed Ms. Wilson that
they are in the process of producing 30-minute program on hurricane preparedness that
includes a demonstration on boarding a building.
Ms Wilson suggested that an emphasis on enhancing and creating natural buffers along
the waterways is needed.
Ms. Wilson questioned if the city had a program in place to buy property in the coastal
areas to build dunes or other mitigation strategies or just create a natural setting. Ms.
Clayton then asked Engineering if there is funding in place to buy property and Mr.
Williams asked what would the selling price be, market or assessed value.
.
Mr. Carrier informed the group that there is funding available to buy a home that is put
up for sale. Many times this type of home is bought and then elevated above the required
FEMA elevation. Ms. Finch informed the group that this process is not an easy process
to accomplish due to the rising costs and level of steps involved. Ms. Clayton suggested
that this may be one of the only ways to keep people out of the flood areas.
Mr. Mariano informed the group that FEMA makes funding available to elevate or tear
down and rebuild elevated structures that have been damaged. This funding is available
through DCA and is awarded on a yearly basis. There is usually $1-2 million available
and it is fairly competitive.
The group requested that a strategy be included stating that the City will assist people in
submitting and processing these grants.
Mr. MacNamee asked if the City does a yearly review of areas that are flooded and then
creates projects to address these flooding areas or if projects are set to start in an area can
the project be expanded to include a previously unidentified flood prone area.
Mr. Carrier informed Mr. MacNamee that this is the job of the CIC and the CISMC.
However, it is hard to find an area that is flood prone unless residents inform the City of
these problems.
.
Ms. Clayton would like the Engineering Department's goals for addressing flooding
included in the document. Mr. Brian Barker, Stormwater Management Manager,
informed the group that these goals are included in the Stormwater Management Policy,
which will be in the appendix.
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Mr. MacNamee wanted to gain an understanding of how developments are reviewed by
engineers and if it is regulated and if there is a mechanism by which approved engineer
drawings are actually built. The group discussed the means by which plans are submitted
and that they have to be submitted, and sealed, by a certified engineer. It is this
engineer's responsibility to ensure that his plans are built.
Ms. Clayton addressed some formatting issues within the mitigation section that need to
be revised.
It was agreed that these revisions would be implemented and then 10 copies of the entire
document would be made available for review by the committee and staff at the Planning
Department offices.
This was the final meeting of the committee and the next meeting will be a City Council
meeting at which the document will be on the agenda for discussion and approval. This
meeting will be held at 6:00 pm on October 21,2004 in the City Council Chamber at City
Hall
The meeting was adjourned at 6:45 PM.
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Appendix D
Flood Protection Questionnaire Press Release
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For Immediate Release
August 2, 2004
Contact:
Gina Clayton
Phone: (727) 562-4587
Flood Protection Questionnaire Available at MyClearwater.com
CLEARWATER, Fla. - To better track which areas of the city flood frequently, the
City of Clearwater Planning Department is conducting a survey of homes to determine
the severity of flooding problems.
Surveys have been mailed to a random sampling of homes in the floodplain. Because
only a small amount of homes receive the survey, others who wish to report flooding can
go to www.MyClearwater.com to fill out the online Flood Protection Questionnaire. The
survey results will be kept separate, but both will be used for information gathering.
The survey can be found on the City's homepage, under the headline "Announcements."
. Residents will provide information about areas such as basements, crawl spaces, and
yards that flood, flood causes such as sewer pumps, backups, high tides, etc., and flood
protection measures taken, if any.
The survey consists of 12 questions. The City of Clearwater participates in the National
Flood Insurance Program so that properties within the City are eligible for federally
backed flood insurance. The City also participates in the Community Rating System,
which is a voluntary flood insurance rating system that seeks to: reduce flood losses,
facilitate accurate insurance ratings, and promote the awareness of flood insurance. Based
on these efforts, Clearwater has attained a Class 7 rating which provides residents living
in the floodplain a 15% discount on flood insurance.
"The City appreciates the time residents take in providing this vital feedback," said Long
Range Planning Manager Gina Clayton. "Clearwater's efforts in communicating with
residents about flood issues will assist us in updating the Floodplain Management Plan
and maintaining the City's Class 7 rating."
For more information, call (727) 562-4587.
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Appendix E
Flood Protection Questionnaire Cover Letter
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City of Clearwater
Floodplain Management Plan
Survey Letter to Floodplain Residents
July 6, 2004
Dear Clearwater Resident:
The City of Clearwater is preparing an update to it's Floodplain Management Plan and
feels that it is essential to obtain feedback from the residents living within the floodplain
areas at the earliest stage of the process. The City has created a questionnaire that is
intended to obtain general information about your property's flooding circumstances.
While there will be opportunities at upcoming public planning meetings to provide
additional information and discuss the revised plan, your participation is appreciated in
answering the questions so that we may begin to gather data about our flood prone areas.
Questionnaire participation is optional. If you decide to participate your answers will be
confidential and used only to obtain a better understanding of the effects flooding has on
our community. Upon completion of the questionnaire, please use the self-addressed
stamped envelope, also included with this correspondence, to return the questionnaire to
the City of Clearwater Planning Department by no later than Wednesday, July 28, 2004.
If you have any questions about this update, please feel free to contact me at (727) 431-
1612. Public planning meetings to discuss the update to the Floodplain Management
Plan will begin in August. At this time, meeting dates and locations are not established,
but will be advertised in local newspapers and on the City's web site at
www.myclearwater.com.
Sincerely,
Marc A. Mariano
Consulting Planner
Enclosed questionnaire
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Appendix F
Flood Protection Questionnaire
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City of Clearwater
Flood Protection Questionnaire
Property address:
Years living at this address:
1. Has your home or property ever been tlooded or had a water problem? ( )Yes () No
If "yes", please complete the entire questionnaire. If "no". please complete questions 6-11.
2. In what years did the tlood occur. and was it due to a named hurricane or tropical storm? If so, please provide the name
of the stormes).
3. Where did you get water and how deep did it get? (In feet)
( ) In basement: deep ( ) In crawl space:
( ) Over ftrst tloor: deep ( ) In yard only:
( ) Water kept out of house by sandbagging, sewer valve or other protective measure
deep
deep
4. What do you feel was the cause of your tlooding? Check all that apply to your situation.
( ) Storm sewer backup ( ) Sanitary sewer backup
( ) Sump pump failure/power failure ( ) Saturated ground/leaks in basement walls
( ) Standing water next to house ( ) Extreme high tide
( ) Overbank tlooding from River/Creek/Lake
( ) Other:
5. Have you installed any tlood protection measures on your property?
( ) Sump pump ( ) Sewer plug or standpipe
( ) Overhead sewers or sewer backup valve ( ) Waterproof walls
( ) Backup power system/generator ( ) Regraded yard to keep water away from building
( ) Other:
6. Are there any areas in your neighborhood (streets, yards, vacant lots. etc.) that consistently get tlooded during periods of heavy rain?
If yes, please describe the location of the areas by using intersections or street addresses.
7. What type offoundation does your building have?
( ) Slab ( ) Crawlspace
( ) Basement
8. Do you have flood insurance or a sewer/basement flood rider to your homeowner's insurance?
( ) Yes ( ) No
9. Have you ever received information on how to protect your family and home from Hooding?
()Yes ()No
If yes, what type of information did you receive?
10. If yes, how recently?
( ) Within the last year
( ) Between 1 and 2 years
( ) Between 2 and 5 years
( ) 5 years or more
11. From whom did you last receive information from about safeguarding your family and home from tlooding?
( ) News media ( ) Insurance agent ( ) Other non-proftt agency
( ) City of Clearwater ( ) Utility company ( ) Not sure
( ) Other government agency ( ) American Red Cross ( ) Other
Please include any additional comments you may have about flooding in your area.
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Appendix G
Flood Protection Questionnaire Results
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u u. u'.:l~l:>"Y~":I!u~~~ ~r Ilr~Pt!~J'_!"f:)!u~~~~!~~~~E!(j~!uh~~.au ~t:It~ru P!~bll!lll?
YES
NO
n _ .. n________,_"_._v...,..~,.<.,,..~...._____._.._ __
"muu_mu.}~.!".~I:I~.Yl!l:I!S did t_he"fl~odi!l~ occur?
N/A
No Flesponse
Annuall}'
1985
1989
1992
1993
1997
1998
2000
2003
2004
Was the floodin!J~Ll.e to.~..Il~m~d hurricane or tropical storm? u
N/A
YES
NO
............ .... No Response
~~.~~!..~i.~.Y-<<>'.":I.~l!t water and how deep did it get?
N/A
GARAGEJBASEMENT
IN CRAWL SPACE
OVER FIRST FLOOR
IN YARD ONLY
WATER KEPT OUT BY SANDBAGS OR OTHER PROTECTIVE MEASURES
. . .
.. .u ... ...... ..........m .._u. ... No Re~ponse
"~~l!It..~~)'o..LJ_~E!lu~~l:lth!!c.au~ <<>.fyourflooding?
N/A
,..'.'n ___ .n._.____._,_~___,____.._.m~_."_.,,'_.._,_.'___,___, ______
STORM SEWER BACKUP
SANITARY SEWER BACKUP
",.' " "'....____..._._______.__.____.____'._m.. _ __.. __ ,___
SUMP PUMP FAILUREJPOWER FAILURE
_,_...________~___"'''"...__._,___" . _'n"" .._._____.
STANDING WATER NEXT TO HOUSE
OVERBANK FLOODING
EXTREME HIGH TIDE
_ __ _u ...~___._.,_. .... ....,__ _'__U''''_'_ .n. _ , _, _ .
SATURATED GROUND/LEAKS IN BASEMENT WALLS
.._.. n..__..u..___.,_.__... _..__ _0. .~,.. '. _,... ,_"._
OTHER
..,-....---... '--"'- -
H~."E!XC?_u~llst~ll~cta!lyf.I~.~c:IP!o.t~~~~n_lllE!8s_ure.s on y~ur.llr~perty?
uumu ...n .ut-Jo Flesponse
SUMP PUMP
OVERHEAD SEWERS OR SEWER BACKUP VALVE
- ."--."._,---,,."~_._.,_.,-_.._. - .--..---
BACK UP POWER SYSTEM/GENERATOR
_"'".._.___.~" _on _....
SEWER PLUG OR STANDPIPE
WATERPROOF WALLS
REGRADED YARD TO KEEP WATER AWAY FROM BUILDING
. ..
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170
170
14
4
4
1
2
17
4
1
1
3
3
170
17
24
15
170
8
3
9
30
4
2
170
22
2
1
2
11
19
3
7
186
1
o
4
o
4
11
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OTHER
"Are'ttu:lre any areas in your neighborhood that consistently get flooded during
m________m__ m __n__ perio(;is of hea.vy rain?
No
STREETS
YARDS
VACANT LOTS
OTHER
No Response
_" .___.___.,._....____. . . .___. _. - ._~_.. .. u_.__... .._.. _
_~~~~!~~.4?!_!~~Il_~~!i~ll_d~s_)'()lJ.r!>u~lcti~!;I_hflve ?
SLAB
CRAWLSPACE
BASEMENT
Unknown
..00 you' have .fioodinsurarl-ce or-a sewerlbasementfloOd rider to YOLJhomeowner's
insurance?
10
86
69
9
1
2
58
183
33
1
7
.
YES
NO
No Response
- -HaveyoLJeVerreceivedinformation-onhowtoll'roteCt you family and home from
flooding?
YES
NO
No response
If yes, how recently?
WITHIN THE LAST YEAR
BETWEEN 1 AND 2 YEARS
BETWEEN 2 AND 5 YEARS
5 YEARS OR MORE
N/A
No Response
Fromwhomclid you last receiveinformatioll aboUt safeguarding your family and
. your home from flooding?
NEWS MEDIA
CITY OF CLEARWATER
OTHER GOVERNMENT AGENCY
INSURANCE AGENT
UTILITY COMPANY
AMERICAN RED CROSS
OTHER NON-PROFIT AGENCY
NOT SURE
OTHER
N/A
No Response
145
75
4
88
132
4
29
16
7
14
132
24
37
17
5
38
4
o
2
10
5
132
2
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Floodplain Management Plan
Appendix H
Community Development Code, Chapter 51 Flood Damage Prevention
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Clearwater Community Development Code
Chapter 51 FLOOD DAMAGE PREVENTION*
*Cross references: Buildings and building regulations, ch. 47; minimum floor elevation
for buildings constructed after February 3, 1975, ~ 47.011; restoration of electrical
service to flooded structures, ~ 47.012.
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Article I. In General
Sec. 51.01. Findings of fact.
Sec. 51.02. Purpose of chapter.
Sec. 51.03. Definitions.
Sec. 51.04. Interpretation of chapter.
Sec. 51.05. Warning and disclaimer ofliability.
Sec. 51.06. Penalties for violation of chapter.
Sec. 51.07. Lands to which this chapter applies.
Sec. 51.08. Adoption of maps and study.
Sec. 51.09. Development permit required.
Sec. 51,10. Administration, permit procedures, duties of building official.
Sec. 51.11. Variances from chapter.
Article II. Flood Hazard Reduction
Sec. 51.31. General standards.
Sec. 51.32. Specific standards.
Sec. 51.33. Streams without established base flood elevations or floodways.
Sec. 51.34. Subdivision proposals.
Sec. 51.35. Areas of shallow flooding (AO zones).
ARTICLE I. IN GENERAL
Sec. 51.01. Findings of fact.
The city commission finds and declares that:
(1) The flood hazard areas of the city are subject to periodic inundation which results
in loss of life and property, health and safety hazards, disruption of commerce and
governmental services, extraordinary public expenditures for flood protection and relief,
and impairment of the tax base, all of which adversely affect the public health, safety and
general welfare; and
(2) These flood losses are caused by the cumulative effect of obstructions in
floodplains causing increases in flood heights and velocities, and by the occupancy in
flood hazard areas by uses vulnerable to floods or hazardous to other lands which are
inadequately elevated, floodproofed, or otherwise unprotected from flood damages.
(Code 1980, ~ 146.002)
Sec. 51.02. Purpose of chapter.
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It is the purpose of this chapter to promote the public health, safety and general welfare
and to minimize public and private losses due to flood conditions in specific areas by
provisions designed to:
(1) Restrict or prohibit uses which are dangerous to health, safety and property due to
water or erosion hazards, or which result in damaging increases in erosion or in flood
heights or velocities;
(2) Require that uses vulnerable to floods, including facilities which serve such uses,
be protected against flood damage at the time of initial construction;
(3) Control the alteration of natural floodplains, stream channels and natural protective
barriers which are involved in the accommodation of floodwaters;
(4) Control filling, grading, dredging and other development which may increase
erosion or flood damage; and
(5) Prevent or regulate the construction of flood barriers which may unnaturally divert
floodwaters or which may increase flood hazards to other lands.
(Code 1980, ~ 146.003)
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Sec. 51.03. Definitions.
The following words, terms and phrases, when used in this chapter, shall have the
meanings ascribed to them in this section, except where the context clearly indicates a
different meaning:
Addition (to an existing building) means any walled and roofed expansion to the
perimeter of a building in which the addition is connected by a common loadbearing wall
other than a firewall. Any walled and roofed addition which is connected by a firewall or
is separated by independent perimeter loadbearing walls is new construction.
Appeal means a request for a review of the building official's interpretation of any
provision of this chapter or a request for a variance.
Area of shallow flooding means a designated AO or va zone on the flood insurance rate
map (FIRM) with base flood depths from one to three feet where a clearly defined
channel does not exist, where the path of flooding is unpredictable and indeterminate, and
where velocity flow may be evident.
Area of special flood hazard means the land in the floodplain within the city subject to a
one percent or greater chance of flooding in any given year. The area may be designated
on the FHBM as zone A. After detailed ratemaking has been completed in preparation for
publication of the FIRM, zone A is usually refined into zones A, AO, AI-99, va and V1-
30.
Base flood means the flood having a one percent chance of being equaled or exceeded in
any gIVen year.
Base flood elevation and BFE mean the elevation above mean sea level as shown in the
Flood Insurance Study.
Basement means that portion of a building having its floor subgrade, i.e., below ground
level, on all sides.
Breakaway wall means a wall that is not part of the structural support of the building and
is intended through its design and construction to collapse under specific lateral loading
forces without causing damage to the elevated portion of the building or the supporting
foundation system.
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Building means any structure built for support, shelter or enclosure for any occupancy or
storage.
Building official means the building official of the city within the meaning of the building
code adopted for enforcement within the city.
City engineer means the city engineer of the city.
Coastal high hazard area means the area subject to high velocity waters, including but
not limited to hurricane wave wash. The area may be designated on a FIRM as zone Vl-
30, VE or V.
Development means any manmade change to improved or unimproved real property,
including but not limited to buildings or other structures, mining, dredging, filling,
grading, paving, excavating, drilling or storage of materials.
Elevated building means a nonbasement building built to have the lowest floor elevated
above the ground level by means of fill, solid foundation, perimeter walls, pilings,
columns, posts, piers, shear walls or breakaway walls.
Elevation means elevation in relation to mean sea level.
Existing manufactured home park or subdivision means a manufactured home park or
subdivision for which the construction of facilities for servicing the lots on which the
manufactured homes are to be affixed, including at a minimum the installation of utilities,
the construction of streets, and either final site grading or the pouring of concrete pads,
was completed before December 31, 1974.
Expansion to an existing manufactured home park or subdivision means the preparation
of additional sites by the construction of facilities for servicing the lots on which the
manufactured homes are to be affixed, including the installation of utilities, the
construction of streets, and either final site grading or the pouring of concrete pads.
Flood and flooding mean a general and temporary condition of partial or complete
inundation of normally dry land areas from the overflow of inland or tidal waters or from
the unusual and rapid accumulation or runoff of surface waters from any source.
Flood hazard boundary map and FHBM mean an official map of the city, issued by the
Federal Emergency Management Agency, where the boundaries of the areas of special
flood hazard have been defined as zone A.
Flood insurance rate map and FlRM mean an official map of the city on which the
Federal Emergency Management Agency has delineated both the areas of special flood
hazard and the applicable risk premium zones.
Flood insurance study means the official report provided by the Federal Emergency
Management Agency which contains profiles, the flood boundary floodway map and the
water surface elevation of the base flood.
Floodway means the channel of a river or other water course and the adjacent land areas
that must be reserved in order to discharge the base flood without increasing the water
surface elevation by a designated height of one foot.
Floor means the top surface of an enclosed area in a building (including basement), e.g.,
top of slab in concrete slab construction or top of wood flooring in wood frame
construction. The term does not include the floor of a garage used solely for parking
vehicles.
Functionally dependent facility means a facility which cannot be used for its intended
purpose unless it is located or carried out in close proximity to water, such as but not
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limited to a boat docking or port facility, shipbuilding, or ship repair. The term does not
include long term storage, manufacture, sales or service facilities.
Habitable floor means any floor usable for living purposes, including working, eating,
sleeping, cooking or recreation, or a combination thereof, such as but not limited to
bedrooms, living rooms, laundry rooms, bathrooms, workshops, dens and studies. The
term does not include a floor used only for storage or vehicle parking purposes.
Highest adjacent grade means the highest natural elevation of the ground surface, prior to
construction, next to the proposed walls of a structure.
Lowest floor means the lowest floor of the lowest enclosed area (including a basement).
An unfinished or flood resistant enclosure, usable solely for parking of vehicles, building
access or storage in an area other than a basement area is not considered a building's
lowest floor, provided that such enclosure is not built so as to render the structure in
violation of the applicable nonelevation design requirements.
Mangrove stand means an assemblage of mangrove trees which is mostly low trees noted
for a copious development of interlacing adventitious roots above the ground and which
contain one or more of the following species: black mangrove (Avicennia nitida); red
mangrove (Rhizophora mangle); white mangrove (Languncularia racemosa); and
buttonwood (Conocarpus erecta).
Manufactured home means a structure, transportable in one or more sections, which is
built on a permanent chassis and designed to be used with or without a permanent
foundation when connected to the required utilities. The term "manufactured home" does
not include a recreational vehicle.
Manufactured home park or subdivision means a parcel or contiguous parcels of land
divided into two or more lots for rent or sale as manufactured home sites.
Market value of the structure means the appraised value of the structure, not including
land, driveways, sidewalks, landscaping, swimming pools and other similar
improvements not related to the basic structure, prior to the start of repair or
improvement or, in the case of damage, prior to the damage occurring.
Mean sea level means the average height of the sea for all stages of the tide. It is used as
reference for establishing various elevations within the floodplains. For purposes of this
chapter, the term is synonymous with National Geodetic Vertical Datum (NGVD).
New construction means structures for which the start of construction commenced on or
after December 31, 1974.
New manufactured home park or subdivision means a manufactured home park or
subdivision for which the construction of facilities for servicing the lots on which the
manufactured homes are to be affixed, including at a minimum the installation of utilities,
the site grading or the pouring of concrete pads, is completed on or after December 31,
1974.
Nonconforming structure means a structure in any area of special flood hazard within the
city which is not elevated or floodproofed to National Flood Insurance Program
standards, as set forth in 44 CFR 59 and 60.
North American Vertical Datum and NA VD, as corrected in 2003, mean a vertical control
used as a reference for establishing varying elevations within the floodplain.
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Ready for highway use, as applied to a recreational vehicle, means that the recreational
vehicle is on its wheels or jacking system, is attached to the site only by quick disconnect
type of utilities and security devices, and has no permanently attached additions.
Recreational vehicle means a vehicle which is built on a single chassis, 400 square feet or
less when measured at the largest horizontal projection, designed to be self-propelled or
permanently towable by a light duty truck, and designed primarily not for use as a
permanent dwelling but as temporary living quarters for recreational, camping, travel or
seasonal use.
Sand dunes means naturally occurring accumulations of sand in ridges or mounds
landward of the high-water line on the beach.
Start of construction, for other than new construction or substantial improvements under
the Coastal Barrier Resources Act (P. L. 97-348), means substantial improvement, and
means the date the building permit was issued, provided the actual start of construction,
repair, reconstruction or improvement was within 180 days of the permit date. The actual
start of construction means the first placement of permanent construction of a structure
on a site, such as the pouring of slabs or footings, installation of piles, construction of
columns, or any work beyond the stage of excavation or the placement of a manufactured
home on a foundation. Permanent construction does not include land preparation, such as
clearing, grading and filling; installation of streets or walkways; excavation for a
basement, footings, piers or foundations or the erection of temporary forms; or the
installation on the property of accessory buildings, such as garages or sheds not occupied
as dwelling units or not part of the main structure.
Structure means a walled and roofed building that is principally above ground, a
manufactured home, or a gas or liquid storage tank.
Substantial damage means damage of any origin sustained by a structure whereby the
cost of restoring the structure to its before damaged condition would equal or exceed 50
percent of the market value of the structure before the damage occurred.
Substantial improvement means with respect to any property located in an area of special
flood hazard reconstruction, rehabilitation, addition or other improvement of a structure
during a one-year period, the cost of which equals or exceeds 50 percent of the market
value of the structure before the start of construction of the improvement.
For the purposes of this definition, construction is considered to have started when the
first alteration of any wall, ceiling, floor or other structural part of the building
commences, whether or not that alteration affects the external dimensions of the
structure. The term includes structures which have incurred substantial damage,
regardless of the actual repair work performed. The term does not, however, include any
project for improvement of a structure to correct existing violations of health, sanitary or
safety code specifications which have been identified by the building official and which
are the minimum necessary to ensure safe living conditions. The term does not include
any alteration of a structure listed on the National Register of Historic Places or the state
inventory of historic places, provided that the alteration will not preclude the structure's
continued designation as a historic structure on such National Register or state inventory.
Variance means a grant of relief from the requirements of this chapter which permits
construction in a manner otherwise prohibited by this chapter where specific enforcement
would result in unnecessary and exceptional hardship.
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(Code 1980, ~ 146.004; Ord. No. 5124, ~ 1, 9-5-91; Ord. No. 5265, ~ 1,9-17-92; Ord.
No. 6987-02, ~ 1,6-6-02; Ord. No. 7213-03, ~ 1, 11-20-03)
Sec. 51.04. Interpretation of chapter.
In the interpretation and application of this chapter all provisions shall be considered as
minimum requirements and deemed neither to limit nor repeal any other powers granted
under state laws.
(Code 1980, ~ 146.11)
Sec. 51.05. Warning and disclaimer ofliability.
The degree of flood protection required by this chapter is considered reasonable for
regulatory purposes and is based upon scientific and engineering considerations. Larger
floods can and will occur on rare occasions. Flood heights may be increased by manmade
or natural causes. This chapter does not imply that land outside the areas of special flood
hazard or uses permitted within such areas will be free from flooding or flood damages.
This chapter shall not be deemed to create liability on the part of the city or any officer or
employee thereof for any flood damages that may result notwithstanding reliance on this
chapter or any administrative decision made thereunder.
(Code 1980, ~ 146.12)
.
Sec. 51.06. Penalties for violation of chapter.
A failure to comply with the provisions of this chapter or any of its requirements,
including conditions and safeguards established in connection with grants of variances,
shall constitute a violation. Any person who violates this chapter or fails to comply with
any of its requirements shall, upon a finding of such violation, be fined not more than
$500.00. Each day a violation continues shall be considered a separate offense. Nothing
contained in this section shall prevent the city from taking such other lawful action as is
necessary to prevent or remedy any violation.
(Code 1980, ~ 146.13)
Sec. 51.07. Lands to which this chapter applies.
This chapter shall apply to all areas of special flood hazard within the city.
(Code 1980, ~ 146.005)
Sec. 51.08. Adoption of maps and study.
Federal Emergency Management Agency maps entitled "Flood Insurance Rate Map and
Floodway", and the accompanying study entitled "Flood Insurance Study -Clearwater",
all effective September 3, 2003, and any subsequent revisions, shall be used to provide
the database for this chapter.
(Code 1980, ~ 146.001; Ord. No. 7182-03, ~ 1, 8-21-03; Ord. No. 7213-03, ~ 1, 11-20-
03)
.
Sec. 51.09. Development permit required.
(1) A development permit shall be required in conformance with the provisions of this
chapter prior to the commencement of any development activities.
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(2) No structure or land shall be located, extended, converted or structurally altered
without full compliance with the terms of this chapter and other applicable regulations.
(Code 1980, ~ 146J)()6)
.
Sec. 51.10. Administration, permit procedures, duties of building official.
(1) Designation of building official. The building official is hereby appointed to
administer and implement the provisions of this chapter.
(2) Permit procedures. An application for a development permit shall be made to the
building official on forms furnished by him prior to any development activities, and shall
include but not be limited to plans drawn to scale showing the nature, location,
dimensions and elevations of the property; existing or proposed structures; fill; storage of
materials; drainage facilities; and the location of the foregoing. Specifically, the
following information is required:
(a) Application stage.
1. Elevation of the proposed lowest floor, including basement, of all structures.
2. Elevation to which any nonresidential structure will be floodproofed.
3. Certificate from a state registered professional engineer or architect that the
nonresidential floodproofed structure will meet the floodproofing criteria in section
51.32(2).
4. Description of the extent to which any watercourse will be altered or relocated as a
result of proposed development.
5. For all additions to or alterations of any structure, an appraisal of the market value of
the structure from an MAl (Member, Appraisal Institute) or SRPA (Senior Real Estate
Appraiser) designated appraiser may be provided, along with information showing all
costs involved in the proposed work, including but not limited to materials and labor. If
an appraisal is not provided, then the appraisal of the value of the structure as determined
by the county property appraiser will be used.
6. For all additions to or alterations of any nonconforming structure, information
showing all of the costs of the proposed work shall be provided to the building official.
7. Elevation certificate of the property showing lowest floor and grade elevations duly
certified by a state registered land surveyor.
(b) Construction stage. Provide a floor elevation or floodproofing certification after the
lowest floor is completed, or, in instances where the structure is subject to the regulations
applicable to coastal high hazard areas, after placement of the horizontal structural
members of the lowest floor. Upon placement of the lowest floor or floodproofing by
whatever construction means, or upon placement of the horizontal structural members of
the lowest floor, whichever is applicable, it shall be the duty of the permit holder to
submit to the building official a certificate of the elevation of the lowest floor,
floodproofed elevation, or the elevation of the lowest portion of the horizontal structural
members of the lowest floor, whichever is applicable, as built, in relation to mean sea
level. The certification shall be prepared by or under the supervision of a state registered
land surveyor or, when floodproofing is utilized for a particular building, the certification
shall be prepared by or under the supervision of a state registered professional engineer or
architect, and shall be certified and sealed. Any work undertaken prior to submission of
the certification shall be at the permit holder's risk. The building official shall review the
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floor elevation survey data submitted. Deficiencies detected by such review shall be
corrected by the permit holder immediately and prior to further progressive work being
permitted to proceed. Failure to submit the certification or failure to make the corrections
required hereby shall be cause to issue a stop work order for the project.
(3) Duties of the building official. The duties of the building official shall include but
not be limited to:
(a) Reviewing all development permit applications to ensure that the permit
requirements of this chapter have been satisfied;
(b) Advising applicants that additional federal or state permits may be required and, if
specific federal or state permit requirements are known, requiring that copies of such
permits are provided and maintained on file with the development permit;
(c) Notifying adjacent communities and the state assistance office for the National
Flood Insurance Program prior to any alteration or relocation of a watercourse, and
submitting evidence of such notification to the Federal Emergency Management Agency;
(d) Ensuring that maintenance is provided within the altered or relocated portion of a
watercourse so that the flood-carrying capacity is not diminished;
(e) Obtaining a certification of the actual elevation of the lowest floor, including the
basement, of all new or substantially improved structures, when certification is required;
(f) Obtaining a certification of the actual elevation to which the new or substantially
improved structures have been floodproofed, when certification is required;
(g) For coastal high hazard areas, obtaining a certification from a state registered
professional engineer or architect that the structure is designed to be securely anchored to
adequately anchored pilings or columns in order to withstand velocity waters and
hurricane wave wash;
(h) For coastal high hazard areas, reviewing plans for adequacy of breakaway walls in
accordance with section 51.32(5);
(i) When floodproofing is utilized for a particular structure, obtaining a certification
from a state registered professional engineer or architect, when certification is required;
G) Making any interpretations which may be needed as to the exact location of
boundaries of the areas of special flood hazard, for example, where there appears to be a
conflict between a mapped boundary and actual field conditions;
(k) Obtaining, reviewing and reasonably utilizing any base flood elevation and
flood way data available from a federal, state or other source whenever base flood
elevation data or floodway data have not been provided as required;
(1) Maintaining all records pertaining to the administration of the provisions of this
chapter;
(m) Promulgating administrative policies and procedures for determining eligible and
ineligible costs for construction or renovation of a structure in the floodplain, consistent
with this chapter and applicable state and federal law. Such administrative policies and
procedures shall be issued before February 1, 1990, and may be amended from time to
time thereafter as circumstances require. Copies thereof shall be provided without cost to
all applicants for building permits in any area of special flood hazard within the city. A
current copy shall be conspicuously posted in a public area of the building official's
office and a current copy shall also be filed in the office of the city clerk.
(Code 1980, ~ 146.007)
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Sec. 51.11. Variances from chapter.
(1) The building/flood board of adjustment and appeals shall hear and decide appeals
from decisions of the building official pursuant to this chapter and requests for variances
from the requirements of this chapter. A decision of the board shall be final, subject to
judicial review by common law certiorari in circuit court.
(2) Variances may be granted for the reconstruction, rehabilitation or restoration of
structures listed on the National Register of Historic Places or the state inventory of
historic places, if the proposed reconstruction, rehabilitation or restoration will not result
in the structure losing its historical designation.
(3) In passing upon such applications, the board shall consider all technical
evaluations, all relevant factors, all standards specified in other sections of this chapter;
and:
(a) The danger that materials may be swept onto other lands to the injury of others;
(b) The danger to life and property due to flooding or erosion damage;
(c) The susceptibility of the proposed facility and its contents to flood damage and the
effect of such damage on the owner;
(d) The importance of the services provided by the proposed facility to the community;
(e) The necessity of the facility to a waterfront location, in the case of a functionally
dependent facility;
(t) The availability of alternative locations not subject to flooding or erosion damage
for the proposed use;
(g) The compatibility of the proposed use with existing and anticipated development;
(h) The relationship of the proposed use to the comprehensive plan and floodplain
management program for that area;
(i) The safety of access to the property in times of flood for emergency and
nonemergency vehicles;
(j) The expected heights, velocity, duration, rate of rise and sediment transport of the
floodwaters and the effects of wave action, if applicable, expected at the site; and
(k) The costs of providing governmental services during and after flood conditions,
including maintenance and repair of public utilities and facilities such as sewer, gas,
electrical and water systems, and streets and bridges.
(4) Conditions for variances:
(a) Variances shall only be issued upon a determination that the variance is the
minimum necessary, considering the flood hazard, to afford relief; and, in the instance of
a historical building, upon a determination that the variance is the minimum necessary so
as not to destroy the historic character and design of the building.
(b) Variances shall only be issued upon a showing of good and sufficient cause, a
determination that failure to grant the variance would result in unnecessary and
exceptional hardship, and a determination that the granting of a variance will not result in
increased flood heights, additional threats to public safety, extraordinary public expense,
the creation of a nuisance or a conflict with existing local laws or ordinances.
(c) Variances shall not be issued within any designated floodway if any increase in
flood levels during the base flood discharge would result.
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(5) Upon consideration ofthe factors listed above, and the purposes of this chapter, the
board may attach such conditions to the granting of variances as it deems necessary to
further the purposes of this chapter.
(6) Any applicant to whom a variance is granted shall be given written notice
specifying the difference between the base flood elevation and the elevation to which the
structure is to be built and stating that the cost of flood insurance will be commensurate
with the increased risk resulting from the reduced lowest floor elevation.
(7) The building official shall maintain the records of all appeal actions and shall report
any variances to the Federal Emergency Management Agency upon request.
(Code 1980, ~ 146.10)
ARTICLE II. FLOOD HAZARD REDUCTION*
*Cross references: Buildings and building regulations generally, ch. 47; floodproofing
certification for the coastal construction zones, ~ 47.010.
.
Sec. 51.31. General standards.
In all areas of special flood hazard, the following standards are required, and compliance
with those standards relating to structural stability shall be certified by an engineer or
architect registered in this state:
(1) New construction and substantial improvements shall be anchored to prevent
flotation, collapse or lateral movement of the structure.
(2) Manufactured homes shall be anchored to prevent flotation, collapse or lateral
movement. Methods of anchoring may include but are not limited to use of over-the-top
or frame ties to ground anchors. This standard shall be in addition to and consistent with
applicable state requirements for resisting wind forces.
(3) New construction and substantial improvements shall be constructed with materials
and utility equipment resistant to flood damage.
(4) New construction and substantial improvements shall be constructed by methods
and practices that minimize flood damage.
(5) Electrical, heating, ventilation, plumbing, air conditioning equipment, and other
service facilities shall be located at or above the base flood elevation or shall be designed
or located so as to prevent water from entering or accumulating within the components
during conditions of flooding.
(6) New and replacement water supply systems shall be designed to minimize or
eliminate the infiltration of floodwaters into the system.
(7) New and replacement sanitary sewage systems shall be designed to minimize or
eliminate the infiltration of floodwaters into the systems and discharges from the systems
into floodwaters.
(8) Onsite waste disposal systems shall be located and constructed to avoid impairment
to them or contamination from them during flooding.
(9) Any alteration, repair, reconstruction or improvements to a structure which is in
compliance with the provisions of this chapter shall meet the requirements of new
construction as contained in this chapter.
(Code 1980, ~ 146.008(a))
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Sec. 51.32. Specific standards.
In all areas of special flood hazard, the following standards are required:
(1) Residential construction (A zone). New construction or substantial improvement of
any residential structure shall have the lowest floor, including the basement, elevated at
or above the base flood elevation. Should solid foundation perimeter walls be used to
elevate a structure, openings sufficient to facilitate the automatic equalization of flood
hydrostatic forces on exterior walls shall be provided in accordance with the standards set
forth in subsection (3) of this section.
(2) Nonresidential construction (A zone). New construction or substantial improvement
of any commercial, industrial or non-residential structure shall have the lowest floor,
including the basement, elevated at or above the base flood elevation. Structure located in
all A zones may be floodproofed in lieu of being elevated, provided that all areas of the
structure, together with attendant utilities, below the required elevation are watertight
with walls substantially impermeable to the passage of water and use structural
components having the capability of resisting hydrostatic and hydrodynamic loads and
the effects of buoyancy. A state registered professional engineer or architect shall certify
that the standards of this subsection are satisfied.
(3) Elevated buildings (A zone). New construction or substantial improvements of
elevated buildings that include fully enclosed areas formed by the foundation and other
exterior walls below the base flood elevation shall be designed to preclude finished living
space and designed to allow for the entry and exit of floodwaters to automatically
equalize hydrostatic flood forces on exterior walls.
(a) Designs for complying with this requirement shall either be certified by a state
registered professional engineer or architect or meet the following minimum criteria:
1. Provide a minimum of two openings having a total net area of not less than one
square inch for every square foot of enclosed area subject to flooding;
2. The bottom of all openings shall be no higher than one foot above grade; and
3. Openings may be equipped with screens, louvers, valves or other coverings or
devices provided they permit the automatic flow of floodwaters in both directions.
(b) Electrical, plumbing and other utility connections are prohibited below the base
flood elevation except as may be required by other codes, or where there is a more
practical location consistent with the intent of another code, and approved by the building
official.
(c) Access to the enclosed area shall be the minimum necessary to allow for parking of
vehicles (garage door), limited storage of maintenance equipment used in connection
with the premises (standard exterior door), and entry to the living area (stairway or
elevator).
(d) The interior portion of such enclosed area shall not be partitioned or finished into
separate rooms.
(4) Manufactured homes and RV requirements.
(a) New and existing manufactured home parks and subdivisions, new and existing
manufactured homes not located within a new or existing manufactured home park and
subdivision, and recreational vehicles that are located or placed or substantially improved
in either areas of special flood hazard or in coastal high hazard areas as defined in this
chapter shall conform to all requirements of 44 CFR 59 and 60, effective November 1,
.
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1989, and for the purpose of this chapter such definitions and requirements as are
contained therein are adopted in this section by reference unless specifically set forth in
this section.
(b) No floodplain management regulations will apply to a recreational vehicle if the
recreational vehicle was onsite for fewer than 180 consecutive days or was fully licensed
as a motor vehicle and ready for highway use.
(5) Floodways. Located within areas of special flood hazard are areas designated as
floodways. Because the floodway is an extremely hazardous area due to the velocity of
floodwaters and erosion potential, the following standards shall apply in any flood way:
(a) Encroachments, including fill, new construction, substantial improvements and
other developments, are prohibited unless certification, with supporting technical data, by
a state registered professional engineer is provided demonstrating that the encroachments
shall not result in any increase in flood levels during the occurrence of the base flood
discharge.
(b) All new construction and substantial improvements shall comply with all
applicable flood hazard reduction provisions of this section.
(c) The placement of manufactured homes is prohibited except in an existing
manufactured home park or subdivision; however, a replacement manufactured home
may be placed on a lot in an existing manufactured home park or subdivision provided
the anchoring standards and the elevation standards set forth in this section are met.
(6) Coastal high hazard areas (V zones). Located within the areas of special flood
hazard are areas designated as coastal high hazard areas. Because these areas have special
flood hazards associated with wave wash, the following standards are required:
(a) All buildings or structures shall be located landward of the coastal construction
control line.
(b) All buildings or structures shall be elevated so that the bottom of the lowest
supporting horizontal structural member, excluding pilings or columns, is located at or
above the base flood elevation level, with all space below the lowest supporting member
open so as not to impede the flow of water. Breakaway walls may be permitted if
designed to wash away in the event of abnormally high tides or wave action and in
accordance with subsection (6)(h) of this section.
(c) All buildings or structures shall be securely anchored on pilings or columns.
(d) All pilings and columns and the attached structures shall be anchored to resist
flotation, collapse and lateral movement due to the effect of wind and water loads acting
simultaneously on all building components. The anchoring and support system shall be
designed with wind and water loading values which equal or exceed the 100-year mean
recurrence interval or one percent annual chance flood.
(e) A state registered professional engineer or architect shall certify that the design,
specifications and plans for construction are in compliance with the provisions of
subsections (6)(b), (c) and (d) ofthis section.
(t) There shall be no fill used as structural support. Limited noncompacted fill may be
used around the perimeter of a building for landscaping or aesthetic purposes provided
the fill will wash out from storm surge, thereby rendering the building free of obstruction,
prior to generating excessive loading forces, ramping effects or wave deflection. The
building official shall approve design plans for landscaping/aesthetic fill only after the
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applicant has provided an analysis by an engineer, architect or soil scientist which
demonstrates that the following factors have been fully considered:
1. Particle composition of fill material does not have a tendency for excessive natural
compaction.
2. Volume and distribution of fill will not cause wave deflection to adjacent properties.
3. Slope of fill will not cause wave runup or ramping.
(g) There shall be no alteration of sand dunes or mangrove stands which would
increase potential flood damage.
(h) Nonsupporting breakaway walls, open wood latticework or mesh screening shall be
allowed below the base flood elevation provided they are not part of the structural
support of the building and are designed so as to break away, under abnormally high tides
or wave action, without damage to the structural integrity of the building on which they
are to be used and provided the following design specifications are met:
1. Design safe loading resistance of each wall shall be not less than ten nor more than
20 pounds per square foot; or
2. If more than 20 pounds per square foot, a state registered professional engineer or
architect shall certify that the design wall collapse would result from a water load less
than that which would occur during the base flood event, and the elevated portion of the
building and supporting foundation system shall not be subject to collapse, displacement
or other structural damage due to the effects of wind and water loads acting
simultaneously on all building components during the base flood event. Maximum wind
and water loading values to be used in this determination shall each have a one percent
chance of being equalled or exceeded in any given year or 100-year mean recurrence
interval.
(i) If breakaway walls are utilized, such enclosed space shall not be designed to be
usable for human habitation but shall be designed to be usable only for parking of
vehicles, building access or limited storage of maintenance equipment used in connection
with the premises.
(j) Prior to construction, plans for any structures that will have breakaway walls shall
be submitted to the building official for approval.
(k) Any alteration, repair, reconstruction or improvement to a structure shall not
enclose the space below the lowest floor except with breakaway walls.
(1) The placement of manufactured homes is prohibited except in an existing
manufactured home park or subdivision; however, a replacement manufactured home
may be placed on a lot in an existing manufactured home park or subdivision provided
the anchoring standards and the elevation standards set forth in this section are met.
(Code 1980, ~ 146.008(b); Ord. No. 5558-94, ~ 1,5-5-94; Ord. No. 7213-03, ~ 1, 11-20-
03)
.
Sec. 51.33. Streams without established base flood elevations or floodways.
(1) Within the areas of special flood hazard where small streams exist where base flood
data have been provided but where no floodways have been provided, the following
standards apply:
No encroachments, including fill material or structures, shall be located less than 20 feet
from the top of the stream bank unless certification by a state registered professional
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engineer is provided demonstrating that such encroachments shall not result in any
increase in flood levels during the occurrence of the base flood discharge.
(2) Within the areas of special flood hazard where small streams exist but where no
base flood data have been provided and where no flood ways have been provided, the
following standards apply:
New construction or substantial improvements of structures shall be elevated or
floodproofed to elevations established by the building official utilizing data available
from a federal, state or other source.
(Code 1980, ~ 146.008(c); Ord. No. 7213-03, ~ 1,11-20-03)
.
Sec. 51.34. Subdivision proposals.
All proposed subdivisions, including but not limited to manufactured home parks and
subdivisions and other proposed developments consisting of at least 50 lots or five acres,
or both, shall be reviewed by the city engineer to determine that the following
requirements have been or will be satisfied:
(1) All subdivision proposals shall be consistent with the need to minimize flood
damage.
(2) All subdivision proposals shall have public utilities and facilities, such as sewer,
gas, electrical and water systems, located and constructed so as to minimize flood
damage.
(3) All subdivision proposals shall have adequate drainage provided so as to reduce
exposure to flood hazards.
(4) Base flood elevation data shall be provided.
(Code 1980, ~ 146.008(d))
.
Sec. 51.35. Areas of shallow flooding (AO zones).
Located within the areas of special flood hazard are areas designated as shallow flooding
areas. Because these areas have special flood hazards associated with base flood depths
of one to three feet, where a clearly defined channel does not exist and where the path of
flooding is unpredictable and indeterminate, the following standards are required:
(1) All new construction and substantial improvements of residential structures shall
have the lowest floor, including the basement, elevated to the depth number specified on
the flood insurance rate map, in feet, above the highest adjacent grade. If no depth
number is specified, the lowest floor, including the basement, shall be elevated at least
two feet above the highest adjacent grade.
(2) All new construction and substantial improvements of nonresidential structures
shall:
(a) Have the lowest floor, including the basement, elevated to the depth number
specified on the flood insurance rate map, in feet, above the highest adjacent grade. If no
depth number is specified, the lowest floor, including the basement, shall be elevated at
least two feet above the highest adjacent grade; or
(b) Together with attendant utility and sanitary facilities, be completely floodproofed
to or above that level so that any space below that level is watertight with walls
substantially impermeable to the passage of water and with structural components having
the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy.
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Appendix I
Community Development Code, Art. 4, Div. Land Clearing and Grubbing
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DIVISION 13. LAND CLEARING AND GRUBBING
Section 4-1301. Permit required.
A land clearing and grubbing permit is required in order to clear or grub any land
in the city. No land clearing and grubbing permit shall be granted prior to
issuance of a Level One or Level Two approval in accordance with the provisions
of Article 4, Divisions 3 and 4. If no Level One or Level Two approval is required
a land clearing and grubbing permit shall be granted if the permit request is in
conformance with the provisions of this division or the terms of a prior approval.
(Ord. No. 6526-00, ~ 1,6-15-00; Ord. No. 6928-02, ~ 109,5-2-02)
.
Section 4-1302. Application/appeal.
A. An application for a clearing and grubbing permit shall be submitted to the
community development coordinator applications forms to be provided,
accompanied by the fee required by Section 4-202(E), and including the following
information:
1. A legible scaled drawing or scaled aerial photograph and a tree survey
showing property boundaries, physical or natural features, and limits of the
proposed work.
2. Purpose of clearing and/or grubbing.
3. Types of equipment to be used.
4. General description of existing vegetation, topography, and any surface
waters present.
5. Method of debris disposal.
6. Anticipated date of commencement and completion of work.
7. Methods of soil erosion and sedimentation control to be undertaken during
earthwork activities and the means and timing of soil stabilization subsequent to
the completion of the clearing and grubbing activities.
8. No tree statement, no tree removal permit required or tree removal permit
required.
B. A denial of a clearing and grubbing permit may be appealed in the manner
provided in Article 4 Division 5.
(Ord. No. 6526-00, ~ 1,6-15-00)
.
Section 4-1303. Criteria for issuance.
In determining whether or not to issue a permit to clear or grub land, the
community development coordinator shall consider:
A. The need for vegetation removal on the property for purposes of land
surveying or land preparation for development or other economic uses.
B. Whether visual access is necessary to comply with the tree survey
requirements in Section 4-1302.
C. Whether the applicant has filed a "no tree verification" form or "no tree
removal permit required verification" form stating that there are no protected trees
on the site or that protected trees exist but do not need to be removed for
construction purposes.
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D. The applicant has provided protective barriers around all protected trees on
the site.
E. Whether the applicant has provided soil erosion and sedimentation control as
required in Article 3, Division 7.
(Ord. No. 6526-00, ~ 1, 6-15-00)
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Appendix J
Erosion and Siltation Control Policy
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City of Clearwater
Florida
Erosion and Siltation
Control Policy
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Requirements for ALL construction
sites regardless of type or size of
construction activity
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EROSION AND SILTATION CONTROL POLICY
The following Erosion and Siltation Control Standards and procedures shall apply to all
physical improvement projects, which are subject to the rules and regulations of the City of
Clearwater.
1. SITE PLAN REVIEW: All erosion and siltation control methods to be employed
during construction shall be shown on the final construction plans submitted for approval to
the City.
2. LAND CLEARING AND GRUBBING: All projects that will denude soil (i.e., one
that requires grass and brush removal or asphalt, concrete and building removal prior to
actual construction) or that will involve ground alteration such as excavation shall be
required to have a grubbing and clearing permit prior to any such work (per Part 1, Article 4,
Division 1301, Community Development Code).
.
3. STABILIZATION OF DENUDED AREAS: No disturbed area may be denuded for
more than thirty (30) calendar days unless otherwise authorized by the City. During inactive
construction periods, denuded areas shall be covered by mulches such as straw, hay, filter
fabric, seed and mulch, sod, or some other permanent vegetation. Within sixty (60) calendar
days after final grade is established on any portion of a project site, that portion of the site
shall be provided with established permanent soil stabilization measures per the original site
plan, whether by impervious surface or landscaping.
4. PROTECTION AND STABILIZATION OF SOIL STOCKPILES: Fill material
stockpiles shall be protected at all times by on-site drainage controls which prevent erosion
of the stockpiled material. Control of dust from such stockpiles may be required, depending
upon their location and the expected length of time the stockpiles will be present. In no case
shall an unstabilized stockpile remain after thirty (30) calendar days.
5. PROTECTION OF EXISTING STORM SEWER SYSTEMS: During construction,
all storm sewer inlets in the vicinity of the project shall be protected by sediment traps such
as secured hay bales, sod, stone, etc., which shall be maintained and modified as required by
construction progress, and which must be approved by the City before installation.
6. SEDIMENT TRAPPING MEASURES: Sediment basins and traps, perimeter berms,
filter fences, berms, sediment barriers, vegetative buffers and other measures intended to
trap sediment and/or prevent the transport of sediment onto adjacent properties, or into
existing water bodies, must be installed, constructed or, in the case of vegetative buffers,
protected from disturbance, as a fIrst step in the land alteration process. Such systems shall
be fully operative and inspected by the City before any other disturbance of the site begins.
Earthen structures including but not limited to berms, earth filters, dams or dikes shall be
stabilized and protected from drainage damage or erosion within one week of installation.
.
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7. SEDIMENTATION BASINS: Areas of 3 acres or more shall be required to have
temporary sedimentation basins as a positive remedy against downstream siltation and will
be shown and detailed on construction plans. During development, permanent detention
areas may be used in place of silt basins, provided they are maintained to the satisfaction of
the City. The contractor will be required to prohibit discharge of silt through the outfall
structure during construction of any detention area and will be required to clean out the
detention area before installing any permanent subdrain pipe. In addition, permanent
detention areas must be totally cleaned out and operating properly at final inspection and at
the end of the one year warranty period. When temporary sedimentation basins are used,
they shall be capable at all times of containing at least one (1) cubic foot of sediment for
each one hundred (100) square feet of area tributary to the basin. Such capacity shall be
maintained throughout the project by regular removal of sediment from the basin.
.
8. WORKING IN OR CROSSING W ATERW A YS OR W A TERBODIES: Land
alteration and construction shall be minimized in both permanent and intermittent
waterways and the immediately adjacent buffer of 25 feet from top of bank of the waterway.
Construction equipment and vehicles shall be kept out of waterways and the buffer area
whenever possible, and barriers shall be used to prevent access. Where in-channel work
cannot be avoided, precautions must be taken to stabilize the work area during land
alteration, development and/or construction to minimize erosion. If the channel and buffer
area are disturbed during land alteration, they must be stabilized within three (3) calendar
days after the in-channel work is completed.
Silt curtains or other filter/siltation reduction devices must be installed on the downstream
side of the in-channel alteration activity to eliminate impacts due to increased turbidity.
(See Index #609 & 610). Wherever stream crossings are required, properly sized temporary
culverts shall be provided by the contractor and removed when construction is completed.
The area of the crossing shall be restored to a condition as nearly as possible equal to that,
which existed prior to any construction activity.
9. SWALES, DITCHES AND CHANNELS: All swales, ditches and channels leading
from the site shall be sodded within three (3) days of excavation. All other interior swales,
etc., including detention areas will be sodded prior to issuance of a Certificate of
Occupancy.
10. UNDERGROUND UTILITY CONSTRUCTION: The construction of underground
utility lines and other structures shall be done in accordance with the following standards:
a. No more than 400 lineal feet of trench shall be open at anyone time;
b. Wherever consistent with safety and space consideration, excavated material
shall be cast to the uphill side of trenches. Trench material shall not be cast
into or onto the slopes of any stream, channel, road ditch or waterway.
.
c.
Storm sewer inlets in the vicinity shall be protected.
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11. MAINTENANCE: All erosion and siltation control devices shall be checked
regularly, especially after each rainfall and will be cleaned out and/or repaired as required.
12. COMPLIANCE: Failure to comply with the aforementioned requirements may result
in a fine and/or more stringent enforcement procedures such as (but not limited to) issuance
of a "Stop Work Order". (Part 1, Article 7, Section 101, Community Development Code)
City of Clearwater Standard Detail Drawings No. 601-607 are examples of accepted
methods that may be used or required to control erosion and siltation.
13. TEMPORARY GRAVEL CONSTRUCTION ENTRANCE & EXIT
Definition - A stone stabilized pad located at points of vehicular ingress and egress on a
construction site.
Purpose - To stabilize entrances to the construction site and reduce the amount of sediment
transported onto public roads by motor vehicles or runoff.
.
Conditions Where Practice Applies - Wherever traffic will be leaving a construction site
and moving directly onto a public road or other paved area.
Planninl! Considerations - Construction entrances provide an area where mud can be
removed from construction vehicle tires before they enter a public road. If the action of the
vehicle traveling over the gravel pad is not sufficient to remove most of the mud, then the
tires must be washed before the vehicle enters a public road. If washing is used, provisions
must be made to intercept the wash water and trap the sediment before it is carried off-site.
Construction entrances should be used in conjunction with the stabilization of construction
roads to reduce the amount of mud picked up by construction vehicles.
Desil!n Criteria -
Aggregate Size - FDOT No.1 Coarse Aggregate (1.5 - 3.5 inch stone)(4 -9 cm) should be
used. Wood chips may be used for single family residential construction, provided that they
can be prevented from floating away in a storm.
Entrance Dimensions - The aggregate layer must be at least 6 inches (15 cm) thick. It must
extend the full width of the vehicular ingress and egress area. The length of the entrance
must be at least 50 feet (20 m). The entrance must widen at its connection to the roadway in
order to accommodate the turning radius of large trucks. (See Index # 601).
14. DEWATERING
. Definition - Lowering the water table by means of pumping.
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Purpose - To allow the construction of structural and stormwater improvements by
removing water from excavation areas and allowing construction by conventional "dry"
methods.
Planninl! Considerations - The major planning consideration in dewatering is disposal of
removed water. Volume, quality, and topography are the factors governing the method and
destination of removed water. Discharge from well-point dewatering is relatively clear
except for the initial discharge after installation or inactivity. Water pumped from a sump
hole is thoroughly sediment laden and must always be treated. Turbid water must either be
filtered before leaving the site or must be impounded onsite and allowed to settle. In flat
terrain it is sometimes more economical to impound relatively clean water rather than pipe it
long distances to a receiving water body.
.
Soecifications - The two most common methods of dewatering used in Horida are well-
point systems and sump pumps. A well-point system consists of one or more rows of small
2" (5 cm) collector pipes, which are jetted vertically into the ground near the proposed
excavation. The small pipes are connected by a larger 6" (15 cm) manifold pipe, which is
connected to the pump and discharge line. The sump method is simply a hole in the ground
with a pump drawing all of the water flowing into the hold. Excess water is conveyed to the
sump by open ditches or perforated pipes embedded in sand or gravel.
Sumos and Ditches - The water table is lowered by ditching and conveying water to a
lowered sump hole. Water pumped from a sump hole is usually heavily laden with
sediments. Water flowing over disturbed and saturated ground detaches and transports all
sizes of soil particles into the sump pit to be sucked up by the pump. Saturated liquid soil
(mud) is also drawn into the pump. The discharged water must be treated before release into
a receiving water body or stormwater system. Placing haybales around the pump intake or
outlet is not sufficient filtration by itself. Turbid water must either be impounded long
enough for effective settling of fines, or filtered through a temporary filter or sediment tank.
Initially the water may percolate freely into the ground, however, this will diminish as the
fine particles settle and clog the surface layer of soil. In situations which preclude the use of
filtration or settlement facilities, and turbid water is discharged directly into a water body, a
suitably designed floating turbidity barrier must be used. Note that this method does not
remove any sediments, it merely allows for dilution to lower the turbidity level.
Horizontal Wells - This system also consists of a series of ditches leading to a sump hole
or pump. The ditches are filled with sand or gravel surrounding a perforated pipe. A
geotextile may also be used to prevent excessive migration of fines into the system. The
discharged water must be treated before release as described below.
.
Well-ooint Systems - The well-point system is the preferred system for dewatering and
should be used whenever possible. The initial discharge yields the sediments displaced by
the installation of the small collector pipes. This can be directed into the excavation, a small
settling or filtration facility, or larger temporary impoundment. Thereafter the water is
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generally clear ground water and may be discharged into a receiving water body provided
that there is suitable conveyance.
Maintenance -
1. Any water impoundment must be inspected daily to prevent failure of dikes, berms,
or control structures. Minor problems should be repaired at once. Major problems
will require a redesign and plan modification.
2. Any filtration device must be inspected and cleaned frequently. The discharge
should be monitored daily and whenever the pumps are started. Inspection and
maintenance of the system are best performed when the facility is dry. The first
signs of diminished performance should be an alarm that maintenance is required. If
the facility will no longer drain itself, the untreated water must be pumped back to
its source, rather than by-passing the facility and discharging to the water body or
stormwater system.
3. Floating turbidity barriers shall be maintained as per FLOATING TURBIDITY
BARRIER
.
15. FLOATING TURBIDITY BARRIER
Definition - A floating geotextile material which minimizes sediment transport from a
disturbed area adjacent to or within a body of water.
Purnose - To provide sedimentation protection for a watercourse from up-slope land
disturbance where conventional erosion and sediment controls cannot be used, or from
dredging or filling within the watercourse.
Conditions where Practice Aoolies - Applicable to non-tidal and tidal watercourses
where intrusion into the watercourse by construction activities has been permitted and
subsequent sediment movement is unavoidable.
Planninl! Considerations - Soil loss into a watercourse results in long-term suspension of
sediment. In time, the suspended sediment may travel large distances and affect
widespread areas. A turbidity curtain is designed to deflect and contain sediment within a
limited area and provide enough residence time so that soil particles will fallout of
suspension and not travel to other areas.
.
Turbidity curtain types must be selected based on the flow conditions within the water body,
whether it be a flowing channel, lake, pond, or a tidal watercourse. The specifications
contained within this practice pertain to minimal and moderate flow conditions where the
velocity of flow may reach 5 feet (1.5 m) per second (or a current of approximately 3 knots).
For situations where there are greater flow velocities or currents, a qualified engineer and
product manufacturer should be consulted.
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Consideration must also be given to the direction of water movement in channel flow
situations. Turbidity curtains are not designed to act as water impoundment dams and
cannot be expected to stop the flow of a significant volume of water. They are designed and
installed to trap sediment, not to halt the movement of water itself. In most situations,
turbidity curtains should not be installed across channel flows.
In tidal or moving water conditions, provisions must be made to allow the volume of water
contained within the curtain to change. Since the bottom of the curtain is weighted and
external anchors are frequently added, the volume of water contained within the curtain will
be much greater at high tide verses low tide and measures must be taken to prevent the
curtain from submerging. In addition to allowing slack in the curtain to rise and fall, water
must be allowed to flow through the curtain if the curtain is to remain in roughly the same
place and maintain the same shape. Normally, this is achieved by constructing part of the
curtain from a heavy woven filter fabric. The fabric allows the water to pass through the
curtain, but retains the sediment particles. Consideration should be given to the volume of
water that must pass through the fabric and sediment particle size when specifying fabric
permeability.
.
Sediment which has been deflected and settled out by the curtain may be removed if so
directed by the on-site inspector or the permitting agency. However, consideration must be
given to the probable outcome of the procedure - will it create more of a sediment problem
by resuspension of particles and by accidental dumping of the material by the equipment
involved? It is, therefore, recommended that the soil particles trapped by a turbidity curtain
only be removed if there has been a significant change in the original contours of the
effected area in the watercourse. Regardless of the decision made, soil particles should
always be allowed to settle for a minimum of 6 - 12 hours before their removal by
equipment or before removal of a turbidity curtain.
It is imperative that the intended function of the other controls in this chapter, to keep
sediment out of the watercourse, be the strategy used in every erosion control plan.
However, when proximity to the watercourse makes successfully mitigating sediment loss
impossible, the use of the turbidity curtain during land disturbance is essential. Under no
circumstances shall permitted land disturbing activities create violations of water quality
standards.
Desien Criteria
1. Type I configuration (See Index # 609) should be used in protected areas where
there is no current and the area is sheltered from wind and waves.
2.
Type II configuration (See Index # 609) should be used in areas where there may be
small to moderate current running (up to 2 knots or 3.5 feet (1 m) per second) and/or
wind and wave action can affect the curtain.
.
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3. Type III configuration (See Index # 609) should be used in areas where considerable
current (up to 3 knots or 5 feet (1.5 m) per second) may be present, where tidal
action may be present, and/or whether the curtain is potentially subject to wind and
wave action.
4. Turbidity curtains should extend the entire depth of the watercourse whenever the
watercourse in question is not subject to tidal action and/or significant wind and
wave forces. This prevents silt-laden water from escaping under the barrier,
scouring and resuspending additional sediments.
5. In tidal and/or wind and wave action situations, the curtain should never be so long
as to touch the bottom. A minimum I-foot (30-cm) "gap" should exist between the
weighted lower end of the skirt and the bottom at "mean" low water. Movement of
the lower skirt over the bottom due to tidal reverses or wind and wave action on the
flotation system may fan and stir sediments already settled out.
6.
In tidal and/or wind and wave action situations, it is seldom practical to extend a
turbidity curtain depth lower than 10 to 12 feet (3 to 4 m) below the surface, even in
deep water. Curtains which are installed deeper than this will be subject to very
large loads with consequent strain on curtain materials and the mooring system. In
addition, a curtain installed in such a manner can "billow up" toward the surface
under the pressure of the moving water, which will result in an effective depth,
which is significantly less than the skirt depth.
.
7. Turbidity curtains should be located parallel to the direction of flow of a moving
body of water. Turbidity curtains should not be vlaced across the main flow of a
significant body of moving water.
8. When sizing the length of the floating curtain, allow an additional! 0 - 20% variance
in the straight line measurements. This will allow for measuring errors, make
installing easier and reduce stress from potential wave action during high winds.
9. An attempt should be made to avoid an excessive number of joints in the curtain; a
minimum continuous span of 50 feet (15 m) between joints is a good "rule of
thumb."
10. For stability reasons, a maximum span of 100 feet (30 m) between anchor or stake
locations is also a good rule to follow.
11.
The ends of the curtain, both floating upper and weighted lower, should extend well
up into the shoreline, especially if high water conditions are expected. The ends
should be secured firmly to the shoreline to fully enclose the area where sediment
may enter the water.
.
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12. When there is a specific need to extend the curtain to the bottom of the watercourse
in tidal or moving water conditions, a heavy woven pervious filter fabric may be
substituted for the normally recommended impervious geotextile. This creates a
"flow-through" medium, which significantly reduces the pressure on the curtain and
will help to keep it in the same relative location and shape during the rise and fall of
tidal waters.
13. Typical alignments of turbidity curtains can be seen in (Index # 610). The number
and spacing of external anchors may vary depending on current velocities and
potential wind and wave action; manufacturer's recommendations should be
followed.
14. Be certain that the type, location, and installation of the barrier is as shown on the
approved plan and permit. Additional permits may be required in navigable
waterways, especially when the barrier creates an obstruction.
16. CONSTRUCTION SPECIFICATIONS
Materials
.
1.
Barriers should be a bright color (yellow or "international" orange are
recommended) that will attract the attention of nearby boaters.
2. The curtain fabric must meet the minimum requirements.
3. Seams in the fabric shall be either vulcanized welded or sewn, and shall develop the
full strength of the fabric.
4. Floatation devices shall be flexible, buoyant units contained in an individual
floatation sleeve or collar attached to the curtain. Buoyancy provided by the
floatation units shall be sufficient to support the weight of the curtain and maintain a
freeboard of at least 3 inches (8 cm) above the water surface level. (See Index #
609).
5.
Load lines must be fabricated into the bottom of all floating turbidity curtains. Type
II and Type III must have load lines also fabricated into the top of the fabric. The
top load line shall consist of woven webbing or vinyl-sheathed steel cable and shall
have a break strength in excess of 10,000 pounds (4.5 t). The supplemental (bottom)
load-line shall consist of a chain incorporated into the bottom hem of the curtain of
sufficient weight to serve as ballast to hold the curtain in a vertical position.
Additional anchorage shall be provided as necessary. The load lines shall have
suitable connecting devices, which develop the full breaking strength for connecting
to load lines in adjacent sections (See Index # 609, which portray this orientation).
.
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6. External anchors may consist of 2 x 4 (5 x 10 cm) or 2 - 1/2 inch (6 cm) minimum
diameter wooden stakes, or 1.33 pounds/linear foot (2 kglm) steel posts when Type I
installation is used; when Type II or Type III installations are used, bottom anchors
should be used.
7. Bottom anchors must be sufficient to hold the curtain in the same position relative to
the bottom of the watercourse without interfering with the action of the curtain. The
anchor may dig into the bottom (grappling hook, plow or fluke-type) or may be
weighted (mushroom type) and should be attached to a floating anchor buoy via an
anchor line. The anchor line would then run from the buoy to the top load line of the
curtain. When used with Type III installations, these lines must contain enough
slack to allow the buoy and curtain to float freely with tidal changes without pulling
the buoy or curtain down and must be checked regularly to make sure they do not
become entangled with debris. As previously noted, anchor spacing will vary with
current velocity and expected wind and wave action; manufacturer's
recommendations should be followed. See orientation of external anchors and
anchor buoys for tidal installation in Index # 610.
Installation
.
1.
In the calm water of lakes or ponds (Type I installation) it is usually sufficient to
merely set the curtain end stakes or anchor points (using anchor buoys if bottom
anchors are employed), then tow the curtain in the furled condition out and attach it
to these stakes or anchor points. Following this, any additional stakes or buoyed
anchors required to maintain the desired location of the curtain may be set and these
anchor points made fast to the curtain. Only then, the furling lines should be cut to
let the curtain skirt drop.
2. In rivers or in other moving water (Type II and Type III installations) it is important
to set all the curtain anchor points. Care must be taken to ensure that anchor points
are of sufficient holding power to retain the curtain under the expected current
conditions, before putting the furled curtain into the water. Anchor buoys should be
employed on all anchors to prevent the current from submerging the floatation at the
anchor points. If the moving water into which the curtain is being installed is tidal
and will subject the curtain to currents in both directions as the tide changes, it is
important to provide anchors on both sides of the curtain for two reasons:
a.) Curtain movement will be minimized during tidal current reversals.
.
When the anchors are secure, the furled curtain should be secured to the upstream
anchor point and then sequentially attached to each next downstream anchor point
until the entire curtain is in position. At this point, and before unfurling, the "lay" of
the curtain should be assessed and any necessary adjustments made to the anchors.
Finally when the location is ascertained to be as desired, the furling lines should be
cut to allow the skirt to drop.
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3. Always attach anchor lines to the flotation device. not to the bottom of the curtain.
The anchoring line attached to the floatation device on the downstream side will
provide support for the curtain. Attaching the anchors to the bottom of the curtain
could cause premature failure of the curtain due to the stresses imparted on the
middle section of the curtain.
4. There is an exception to the rule that turbidity curtains should not be installed across
channel flows; it occurs when there is a danger of creating a silt buildup in the
middle of a watercourse, thereby blocking access or creating a sand bar. Curtains
have been used effectively in large areas of moving water by forming a very long-
sided, sharp "V" to deflect clean water around a work site, confine a large part of the
silt -laden water to the work area inside the "V" and direct much of the silt toward the
shoreline. Care must be taken, however, not to install the curtain perpendicular to
the water current.
5. See Index # 610 for typical installation layouts.
6.
The effectiveness of the barrier can be increased by installing two parallel
curtains, separated at regular intervals by 10' (3 m) long wooden boards or lengths
of pipe.
Removal
1. Care should be taken to protect the skirt from damage as the tmbidity curtain is
dragged from the water.
2. The site selected to bring the curtain ashore should be free of sharp rocks, broken
cement, debris, etc., so as to minimize damage when hauling the curtain over the
area.
3. If the curtain has a deep skirt, it can be further protected by running a small boat
along its length with a crew installing furling lines before attempting to remove the
curtain from the water.
Maintenance
1. The developer/owner shall be responsible for maintenance of the filter curtain for the
duration of the project to ensure the continuous protection of the watercourse.
2.
Should repairs to the geotextile fabric become necessary, there are normally repair
kits available from the manufacturers; manufacturer's instructions must be followed
to ensure the adequacy of the repair.
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3. When the curtain is no longer required as determined by the inspector, the curtain
and related components shall be removed in such a manner as to minimize turbidity.
Sediment shall be removed and the original depth (or plan elevation) restored before
removing the curtain. Remaining sediment shall be sufficiently settled before
removing the curtain. Any spoils must be taken to an upland area and stabilized.
Sheet Flow Avvlication: Silt Fence
This sediment barrier uses standard strength or extra strength synthetic filter fabrics. It is
designed for situations in which only sheet or overland flows are expected. (See Index #
607).
1. The height of a silt fence shall not exceed 36 inches (90 cm). Higher fences may
impound volumes of water sufficient to cause failure of the structure.
2. The filter fabric shall be purchased in a continuous roll cut to the length of the
barrier to avoid the use of joints. When joints are necessary, filter cloth shall be
spliced as described in Figure 6.
3.
Posts shall be spaced a maximum of 10 feet (3 m) apart at the barrier location and
driven securely into the ground a minimum of 12 inches (30 cm). When extra
strength fabric is used without the wire support fence, post spacing shall not exceed
6 feet (1.8 m).
4. A trench shall be excavated approximately 4 inches (10 cm) wide and 4 inches (10
cm) deep along the line of posts and upslope from the barrier.
5. When standard strength filter fabric is used, a wire mesh support fence shall be
fastened securely to the upslope side of the posts using heavy duty wire staples at
least 1 inch (25 mm) long, tie wires, or hog rings. The wire shall extend into the
trench a minimum of 2 inches (5 cm) and shall not extend more than 36 inches (90
cm) above the original ground surface.
6. The standard strength filter fabric shall be stapled or wired to the fence, and 8 inches
(20 cm) of the fabric shall be extended into the trench. The fabric shall not extend
more than 36 inches (90 cm) above the original ground surface.
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Floodplain Management Plan
DIVERSION RIDGE REQUIRED
WHERE GRADE EXCEEDS 2%
GRt.~~R
~
EXISTING PAVED
ROADWAY
FILTER FABRIC
SECTION A - A
SPILLWAY
NOTE:
USE SANDBAGS, STRAW BALES
OR OTHER APPROVED METHODS
TO CHANELlZE RUNOFF TO BASIN
AS REQUIRED.
/
/
"-
\
SEDIMENT BARRIER \
(STRAW BALE TYPE SHOWN
\
SUPPLY WATER TO WASH
~:E~ IF NE~SSAR, I
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S I I t
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~ II t "-
)(~~ I~I
L.---- DIVERSION RIDGE
w
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FLOW
1
2"-3" COURSE
AGGREGATE
MIN. 6" THICK
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PLAN
NOTES:
1. THE ENTRANCE SHALL BE MAINTAINED IN A
CONDITION THAT WILL PREVENT TRACKING OR
FLOWING OF SEDIMENT ONTO PUBLIC
RIGHTS-OF-WAY. THIS MAY REQUIRE TOP
DRESSING, REPAIR AND/OR CLEAN OUT OF ANY
MEASURES USED TO TRAP SEDIMENT.
2. WHEN NECESSARY, WI1EELS SHALL BE CLEANED
PRIOR TO ENTRANCE ONTO PUBLIC RIGHT-OF WAY.
3. WHEN WASHING IS REQUIRED. IT SHALL BE DONE
ON AN AREA STABILIZED WITH CRUSHED STONE
THA T DRAINS INTO AN APPROVED SEDIMENT TRAP
OR SEDIMENT BASIN.
REV.
CITY OF CLEARWATER, FLORIDA
PUBLIC WORKS ADMINISTRATION
ENGINEERING
TEMPORARY EROSION
CONTROL
DIVERSION BERM
DAlE
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DRA* BY
....C.
0lEQCED BY
B.G.
GNED BY
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Floodplain Management Plan
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J :\00083\00083 I 26.00\DOC\Reports\CLWFM P I 0-13.doc
.
City of Clearwater
Floodplain Management Plan
I
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THE GrouD. Inc.
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City of Clearwater
Floodplain Management Plan
FILTER FABRIC \
MATERIAL
~~ii
__ I "II.
__-1-i-r1-r=+=m1 II '.
--n1'I' I I I ~
-r-If: I I I I I I I .1 .
'~~":"'llll'''''l
.-'''' I " 1 l~+-++' 'I I ~,
--.- '100' " ,: Ill)..'
__4.-....-+-. .-+- . -+--t-t=~-
_.~'-r" r J ti I I .. i" I .J.----
-r...,....ri'""iI1- 1'-+' I I ," m31' I 1 t+~---
-- 1 I' 'I H.-t--+--r-~It-+ .-...-
f 'r:.''::~ 1 I I i I ii, 1.1-Lj,J-I.!.-l -
'. -"1 I I I I I I riil 1 ,_yo-
\-4- I I I I t .Ll.._1 .~
,,1 I I 'i _J--"""""
. 4-'- "J---
2 MIN. ~n_4' _, L-,L.L-..J-- .
L tit. I .w..::t:v
,_ )- i..:-
~~~;
SPACING OF POSTS
TO BE 6-10 FEET APART
BACKRLLED TRENCH
FOR ADDITIONAL STRENGTH
FILTER FABRIC MATERIAL CAN
BE ATTACHED TO A 6-INCH (MAX)
MESH WIRE SCREEN WHICH HAS
BEEN FASTENED TO THE POSTS
.
FILTER FABRIC
MATERIAL SECURELY
I" ASTENEO TO THE
POSTS OR IF USED
THE WIRE MESH
ATTACHING TWO SILT FENCES
\
. . [J---U-
~^l
WOOD OR I I
STEEL POST I
"'l
I
I
t--------l
I
10 INCHES I
(MIN) I
! ,
L \j
\.1
____'I
APPROXlMA TEL Y 8
INCHES OF FILTER
FABRIC MATERIAL
MUST EXTEND INTO
A TRENCH AND BE
ANCHORED WITH
COMPACTED
BACKFILL MATERIAL
c__ .....-
~--.,......
PLACE THE ENO
POST OF THE
SECOND FENCE
INSIDE THE END
POST OF THE
FIRST FENCE
RUNOFF
( [If'-~-
ROTATE BOTH
POSTS AT LEAST
180 DEGREES IN
A CLOCKWISE
DIRECTION TO
CREATE A TIGHT
SEAL WITH THE
FABRIC MATERIAL
DIRECTION OF RUNOFF WATERS
~
~ ~
DRIVE BOTH
POSTS ABOUT 10
INCHES INTO THE
GROUND AND
BURY FLAP
aJ-/;","-
.
11[\I.
Do\1E
DESCRlPlION
ORA" BY
BVO
0lEtICED BY
B,G.
DESIGNED BY
CITY OF CLEARWATER, FLORIDA
PUBLIC WORKS ADMINISTRATION
ENGINEERING
INSTALLING A RL TER
FABRIC SILT FENCE
DAlE
7 02
INDEX NO.
7
1Df'3
APP.
~ Clearwater
u~
J 18
THE GrouD. Inc.
J :\00083\00083 I 26.00\DOC\Reports\CL WFM P I 0-13.doc
.
.
.
City of Clearwater
Floodplain Management Plan
1. Set Stokes
6' Max.
-
~~
3. Staple Filter Material To Stokes
And Extend It Into The Trench
.JJ. 1m l{J
. /' 't
,r" ...1 ,.,,~~',' -.,
l..L!'),,, &/ m....--- ~\l;.,
'''~Ii'1'1-...:: ,.G ./ 51!
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:>.... ~l;l'~ I.'~.i'u ~I!o;,
.....I'I~..."~ It't.
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....e
..."-- v
----
o
I
P 0
h R'.I ~
) l ~ 4
~ ~ " /
i i 1)
I I l:
o
2. Excavate a 4" x 4" Trench
Upscole Along The Line Of Stokes
4. Bockfill And Compact The
Excavated Soil
,/ft ~ffi ~/.
..' . ,-' I II
~ .' I __h. \!.~
..~- """....:: ~rr'
'-:;~ l fa!
.." ,~Il:
, 21,:
",r 5. ~I
uJ
Sheet Flow Installation
(Perspective View)
o
o
Points A Should Be Higher Than Point B
Drainage Installation
(Front Elevation)
REV.
DATE
DESlRPlIDN
~ Clearwater
c~
CITY OF CLEARWATER, FLORIDA
PUBUC WORKS ADMINISTRATION
ENGINEERING
INSTALLING A FILTER
FABRIC SILT FENCE
AP9.
ORA'" BY
M.C.
lH:ClCED BY
B.G.
BY
DATE
7 02
INDEX NO.
6 7
201'3
119
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.
.
.
EXTRA STRENGTH FILTER FABRIC ~
NEEDED WITHOUT WIRE MESH SUPPORT ~
!?II
II
III
III
III
II I
City of Clearwater
Floodplain Management Plan
STEEL OR ~
WOOD POST III
II I
I I I
II
II I
II I
I I
I I I
! I
FLOW
::e----
FLOW
-
FLOW
-
--
-
---
---- 10' MAX. SPACING WITH
WIRE SUPPORT FENCE
6' MAX SPAONG WITHOUT
WIRE SUPPORT FENCE
STEEL OR
WOOD POST
36" HIGH MAX.
PONDING HT.
/FILTER FABRIC
A IT ACH SECUREL Y
TO UPSTREAM
SIDE OF POST
RUNOFF
T
12" MIN.
~
\.. , S. TREND<
WITH COMPACTED
BACKFILL
STANDARD DETAIL
TRENCH WITH NATIVE BACKFILL
PONDING HT.
RUNOFF
9" MAX.
(RECOMMENDED)
STORAGE HT.
T-
~ --1
'. B"
\ l
~GRAVEL
12" MIN.
ALTERNATE DETAIL
TRENCH WITH GRAVEL
NOTES:
1. INSPECT AND REPAIR FENCE AFTER EACH STORM EVENT AND REMOVE SEDIMENT
WHEN NECESSARY.
2. REMOVED SEDIMENT SHALL BE DEPOSITED TO AN AREA THAT WILL NOT
CONTRIBUTE SEDIMENT OFF-SITE AND CAN BE PERMANEN1L Y STABILIZED.
3. SILT FENCE SHALL BE PLACED ON SLOPE CONTOURS TO MAXIMIZE PONDING
EFFICIENCY.
REV. DATE
DESCRIPTION
~.. Clearwater
0~
120
CITY OF CLEARWATER. FLORIDA
PUBLIC WORKS ADMINISTRATION
ENGINEERING
INSTALLING A FlL TER
FABRIC SILT FENCE
DRA. BY
N.B.
0lEQ(tJ) BY
B.G.
N'P. IlESIQlED BY
DATE
7 02
INDEX NO.
7
30f'3
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.
.
.
City of Clearwater
Floodplain Management Plan
~
A
~Jt
~.,.
PLAN VIEW
ATTACH FILTER FABRIC
SECURELY TO 2"x 4" WOOD
FRAME, OVERLAPPING
FABRIC TO NEXT STAKE
-t
w
:><:
Ci
>-
Q:
<
Q:
o
CL
~
~
TOP FRAME NECESSARY
FOR STABiLiTY
2"x 4" WOOD FRAM/ PONDING HT.
4 SIDES OF 0.1.
.
18" MAX.
._._~:~A_X. j . _-----..
-- - .~_.-~---....-
! - ...----.--_ . .. I.. . ~ -
i 12" MIN. ~ r . "'1. !
I .,,\. f
J -, ---~~~-~~-V..:~. DROP INLET ~~~
r'.! . . ~
I . ~'.
SECTION A-A
NOTES:
1. DROP INLET SEDIMENT BARRIERS ARE TO BE USED FOR SMALL. NEARLY LEVEL DRAINAGE AREAS.
(LESS THAN 5%)
2. USE 2"x 4" WOOD OR EQUIVAlENT METAL STAKES. (3 FT. MIN. LENGTH)
3. INSTALL 2"x 4" WOOD TOP FRAME TO INSURE STABILITY.
4. THE TOP OF THE FRAME (PONDING HEIGHT) MUST BE WELL BELOW THE GROUND ELEVATION
DOWNSLOPE TO PREVENT RUNOFF FROM BYPASSING THE INLET. A TEMPORARY DIKE MAY BE
NECESSARY ON THE DOWNSLOPE SIDE OF THE STRUCTURE.
REV.
DAlE
IlEsalIPlIllN
~Clearwater
I.'~
121
CITY OF CLEARWATER. flORIDA
PUBLIC WORKS ADMINISTRATION
ENGINEERING
TEMPORARY SEDIMENT r;f2
BARRIER AT DROP INLET INOEX NO.
APP.
ORA" BY
No""
OlECICED BY
B.G.
BY
lOf2
THE GrouD. Inc.
J :\00083\00083 I 26.00\DOC\Reports\CL WFMPI 0-13.doc
.
.
.
City of Clearwater
Floodplain Management Plan
2" x 4" WOOD FRAME
-.....
~ .../ "'"
I """ ,/',
~, .........
1.5. MAX. '!, ,.' '..
.'.............. ....""/.. ............. I
~ 1'", .... /" ........, i
I I...., ' ........11
i ! ....:>....... /' i'
i ! ....' ,." ,"''''''''>.... ......" _ . ./.,;:..~ ~........j I,~
':,' <, ~~ . ,/ .~$> '> I'
I I ....... .... ...... " . ,'" <1'-:......>... ,....,; ..'~ I I
I .....,~ ........~~~...~~ /"" <"-~~<..;v .,...... .,.," II I
II I ......... ....~~~ ,"...... ...,'" ~. ::'.......,. "... ',,/ I'" J' MIN.
) '-. ,,'~', "'," /,....<,'>' ..../ I I
1I """ -'~~';~~,J .... ~,-s.""'>' ..././....,../... ~I )~
~ ......... ...~~::--...I ~ "'".... ,/
....,....., .......'":..1. J..........' /,,,,,
.... 1" ......-1 "
/,1"
FABRrc'::fcii:."Ws :: J
~
Isometric View
FABRIC ~ ~:~AK:)
I I
I I
: ~
____ I I
-!-_~.
I I . 12" MIN.
J'l t
-~
Elevation of Stoke and
Fabric Orientation
Specific AODlication
This method of inlet protection is applicable where the inlet drains in a relatively flat area (slope na
greater than 5%) where the inlet sheet of overlandflows (not exceeding 1 c.f.s.) are typical. The
method shall not apply to inlets receiving concentrated flows, such as in street or highway medians.
CITY OF CLEARWATER, FLORIDA
PUBUC WORKS ADMINISTRATION
ENGINEERING
TEMPORARY SEDIMENT
BARRIER AT DROP INLET
REV.
DRAWN BY
NaY<>
QiEQCED BY
B.G.
CESIClNED BY
DAlE
7 02
INDEX NO.
608
2OF2
DAlE
IlESCRIP1ION
APP.
~. Clearwater
u~
]22
THE GrouD. Inc.
J :\00083\00083 I 26.00\OOC\Repons\CL WFM P I 0-13.doc
.
.
.
City of Clearwater
Floodplain Management Plan
5/8 IN. POl VPROPYlENE Ra'E
1/4 IN. liE ROPE
DEPlH ACCORDING TO NEED
NYLON REINFORCED VINYL
1/4 IN. OIAIN
ALL SEAMS HEAT SEALED ~
(BLOW-UP OF SHAO<LE CCHtECTlON) 0
1YPE I
GALVANIZED 124 SAFETY HOOK
18 (OR 22) OZ. VINYL COVERED NYLON SEAL
PVC SLOT-CONNECTOR~
TOP LOAD UNE
5/18 VINYl.. COAlED CABLE
FOLDS ~y 6 FEET
SlRESS BAND
5/16 IN. OIA1N
BAlLAST a: lOAD UNE
STRESS PlA'IE
1YPE n
REV. DAlE
CITY OF' CLEARWATER. F'LORIDA
PUBLIC WORKS ADMINISTRATION
ENGINEERING
FLOAllNG TURBIDITY
BARRIERS
TYPE I AND TYPE II
ORA'" BY
BVD
awl BY
B.G.
BY
DAlE
7
INDEX NO.
DESCRP1IDN
N'P.
1(1'2
; Clearwater
'l~~
123
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J:\OOO83\OOO83 I 26.00\DOC\Reports\CLWFMPI 0-13.doc
.
.
.
City of Clearwater
Floodplain Management Plan
nPE III
22 OZ NYlON REINFORCED VINYl
PVC SlOT - CONNECTOR
124 SAFETY HOOK
:5/16 VINYl COAllNG CABLE
(ON BOlli SIDES OF aJRTAlN
TO REDUCE STRAIN)
ORJENTAllON MiEN INSTALLED
(11DAL SllUAllON - 1lPE II)
NOlE: ANCHORING Willi BUOYS,
AS SHOWN. ~ ALl
VERllCAL FORCES FROM THE
aJRTAlN. HENCE. THE aJRTAIN
WIll NOT SINK FROM WIND OR I
aJRRENT lOADS. " ......
~/
AUTOMA llC FLASHING
:/ UGHT (ON AT DUSK-
ATIACH lINES OFF AT DAWN) 100'
TO SHACKLE ON CENTER SHALl BE
USED IN NAVIGABLE
I CHANNElS ONlY
" ......
STANOARD CONTAINMENT
SYSTEMS UGHT BUOY
REV. DAlE
CITY OF CLEARWATER. FLORIDA
PUBLIC WORKS ADhollNISTRATION
ENGINEERING
FLOAllNG TURBIDITY
BARRIER
TYPE III
DESCRP1ION
DR". BY
BVO
a<ED BY
B.G.
N'f'. E5IGNED BY
~ Clearwater
u~
124
THE GrouD. Inc.
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.
City of Clearwater
Floodplain Management Plan
TYPICAL LAYOUlS
STREAMS. PONDS. AND LAKES (PROlEClED AND NON-11DAL)
.-,
ANa-tOR PT.
-+
STAKE OR ANa-tOR
EVERY 100' (TYPICAL)
SHORElINE
~ F1lL AREA
· THIS DISTANCE IS VARIABlE
SHORELINE
ANa-tOR PT.
llDAL WAlERS AND/OR HEAVY' '*D AND WA~ AClION
.
..,.- ~
.,,- --
..--
--
EBB S- FlOOD
-
-
-
-
-
~ ~..-.
-
~ --'
EXIS11NG
CAUSEWAY
-
-
· THIS DISTANCE IS VARIABLE
ANaiOR ell
ANaiOR BUOY
BARRIER MOVEMENT
DUE TO 11DAL aiANGE
~ ALL AREA
SHOREUNE ./
ANCHOR PT.
.
REV.
DAlE
DESCRPllllN
t'RA.. BY
BVO
a<ED BY
B.G.
ESGNED BY
CITY OF CLEARWATER, FLORIDA
PUBLIC WORKS ADMINISTRATION
ENGINEERING
TYPICAL INSTALLATION r~2
LA YOU TS OF INDEX NO.
FLOATING 1URBIDITY
BARRIERS
1 (F 1
_.
~ Clearwater
u~
125
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.
.
.
City of Clearwater
Floodplain Management Plan
Strow Bales Are To Be Placed 4 Inches
In The Soil. Tightly Abutting With No
Gap. Stoked And Backfilled Around The
Entire Outside Perimeter.
B ~
= = = =
~
0 0
------=::::: A A
0 0
--=:.
- 0
~ 0
= = = =
~
o
o
------
=--------
---
~
---.: Area Inlet
with Grate
PLAN VIEW
L Stoked Strow Bale
- I
I
I
Runoff Water ~__
with sedime~t :
.... ......:.// I
-....................... V-,",
.......:.;....:..:..::.....:....:::..:. /l
.----.-----:::..-.----- L__
! I
U
-1
I
l. ..'.
I ..,~
, ..
!I ~~~. ~.
.. .
S CTION
. ".. .
......
.. ',.
A-A
This method of inlet protection is applicable where the inlet drains a relatively flat area (slopes no
greater than 5%) where sheet or overland flows (not exceeding 0.5 cfs) are typical. The method
shall not apply to inlets receiving concentrated flows, such os stree or highway medians.
REV. DAlE
CITY OF CLEARWATER. FLORIDA
PUBLIC WORKS ADMINISTRATION
ENGINEERING
1EMPORARY STRAWBALE rTE
SEDIMENT BARRIER INDEX NO.
AT STORM DRAIN
DROP INLET
ORA. BY
!.l.C.
[CKED 8Y
B.G.
8Y
DESCRlPlION
N'P.
1 CF 1
~ Clearwater
;~-~
126
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.
.
.
City of Clearwater
Floodplain Management Plan
~~
/"'~ /'
/~-/
~ct.. '.... "
?'". ./ "...... '
=-...."
. "')J::J "
~:
~\6"~
Bales Must Be Tightly
Abutting With No Gaps
,. Excovate the Trench
:~ Clearwater
~~
Binding Wire
or Twine
/ ," x 2" Stoke
Staked and Entrenched
50 Ib (opprox.) Straw Bale
~ Compacted Soil to
I (Prevent Piping
, ~ediment Laden
Runoff
H\ 1((..............
JLL iLl] --,.;~.:~:.,.,~;;;:;:::~--
U=rS" Min.
Properly Installed Strow Bole
(Cross-Section)
2.
Angle First Stoke
Toward Previously
Laid Bale
//
3. Backfill and Compact the
Excavated Soil
CITY OF CLEARWATER. FLORIDA
PUBLIC WORKS ADt.4INISTRATION
ENGINEERING
REV.
DRA" BY
Novo
BY
B.G.
B'(
1 CF ,
TEMPORARY STRAWBALE
SEDIMENT BARRIER
DAl[
7 0
INDEX NO.
DAl[
DESCRP1ION
_.
127
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.
.
.
City of Clearwater
Floodplain Management Plan
J'MIN.
Staked and Tren<:hed
Silt F' ence
~
4"
T'rP
l~L
f
'-
II
Wiro Reinforced Sloked ond Trenched
Silt fence
r
DOUBLE ROW STAKED SILT FENCE
REV.
DESCRlpnON
~ Clearwater
~~
128
ORA..... BY
Novo
CHECKED BY
8.S.
4PP. DESIGNED BY
CITY OF CLEARWATER. FLORIDA
PUBLIC WORKS ADI.4INISTRATION
ENGINEERING
, "ATr
TEMPORARY STRAWBALE ' I':':Y?~
SEDIMENT BARRIER 61~
, or 1
THE GrouD. Inc.
J :\00083\00083 I 26.00\DOC\Reports\CL WFMP I 0-13.doc
City of Clearwater
. Floodplain Management Plan
.
.
Ie ,. ~;""'... ...,......!"II
!f!li iqJ!tm'ilii~ liiii U :i nil ~ Uti l:Lql !n Iii; ;1,'fUt'i
il'hh ~il J.",~ Ifllill II II Ifn e ~~i~ lill :!l ' t f Ifli &
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City of Clearwater
Floodplain Management Plan
Appendix K
Stormwater Design Criteria
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THE GrouD. Inc.
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City of Clearwater
. Floodplain Management Plan
CITY OF CLEARWATER
DEPARTMENT OF PUBLIC WORKS
STORM DRAINAGE DESIGN CRITERIA
INTRODUCTION
This manual is a guide to assist Engineers in the design of stormwater systems in the City of
Clearwater. In general these standards are a combination of requirements set by the
Southwest Florida Water Management District, and requirements set by the City of
Clearwater, Public Works Department. This manual does not propose to itemize the
requirements of the Southwest Florida Water Management District, but to highlight and
detail the requirements of the City of Clearwater. Where design standards of applicable
regulatory agency's vary, the more restrictive or higher standard will apply. The Designer is
required to be familiar with the current design requirements of the Southwest Florida Water
Management District. The appropriate Southwest Florida Water Management District storm
water permit and other applicable regulatory agency permits will be required prior to any
final construction permit approval by the City of Clearwater.
.
The Designers attention is called to the City of Clearwater requirement that all development
and redevelopment will require provisions for storm water management. In particular,
redevelopment will be required to provide storm water management facilities in accordance
with the regulations herein.
For the purpose of administering these stormwater management regulations, redevelopment
is defined as the alteration of buildings, parking, or other landform features of a property
which necessitates the Community Development Code review process. Redevelopment of
property for which no stormwater management facilities exists will be required to provide
such facilities in accordance with the methodology contained herein, notwithstanding that
the circumstances of the redevelopment may not result in an increase of storm water runoff.
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City of Clearwater
Floodplain Management Plan
STORMWATER MANAGEMENT
DESIGN CRITERIA
1. GENERAL:
All construction shall comply with the City of Clearwater Contract Specifications and
Standards. All storm water facility designs must be designed and certified by a Florida
Registered Engineer.
Record drawings shall be submitted and certified by a Florida Registered Engineer before
final acceptance of project.
Desil!l1 FreQuencv
(a) - 10 Year - storm systems, culverts
(b) - 25 Year - channels and detention areas with outfalls
(c) - 50 Year - detention areas without outfalls
(d) - 1 00 Year - detention areas without outfalls which when capacity is exceeded
overflow onto private property
.
Runoff Coefficients:
Ponds, lakes and detention area (wet or dry)
1.00
Buildings, paved areas, and other impervious areas
0.95
Turfblock
0.45
Green or pervious areas
0.20
Design coefficients shall be obtained by using the above coefficients on a weighted run off
method for both pre-development and post -development.
2. STORM DRAINAGE:
Detention areas must be built before storm sewers are installed. Slopes shall not be steeper
than four to one (4 : 1) and shall be protected from erosion by sod.
Time of Concentration
.
Time of concentration to first inlet on a system shall be determined by using velocity of
runoff chart. (Chart attached). A minimum time of 15 minutes to first inlet shall be used.
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City of Clearwater
Floodplain Management Plan
3. STORM SEWERS. INLETS. AND STREET DESIGN PERTAINING TO
WATER FLOW
Unless specifically approved by the City Engineer, reinforced concrete pipe shall be used in
all easements and street rights-of- way. Minimum size shall be 15" diameter. Design
frequency - 10 year storm. Mannings Roughness coefficient for storm pipe:
(a) RCP
15" - 30" inclusive
36" - 48" "
54" - up
N
0.013
0.012
0.011
(b) CMP or Aluminum
Asphalt coated
0.023
0.018
(c) PVC Storm Drain Pipe
0.009
The slopes for culverts used as storm sewers shall produce a velocity within the following
limits:
.
Maximum
CMP 10 f.p.s.
RCP 12 fp.s.
Minimum
2 fp.s.
2 fp.s.
Standard hydraulic gradient elevation shall be minimum of 1.0 foot below throat of inlet or
manhole.
Minimum Culvert Size:
(a) - Pipe - 15"
(b) - Box Culvert - 3' x 3'
Maximum length of pipe without access structure:
(a) - (15" - 18") Pipe - 350 ft.
(b) - (24" - 36") Pipe - 400 ft.
(c) - (42" & cover & all box culverts) - 500 ft.
4. INLETS AND MANHOLES:
Vertical throat opening for inlets shall be 5".
. Inlets and manholes will be designed so as not to have standing water when not functioning.
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City of Clearwater
Floodplain Management Plan
All inlets to have manhole lids in accordance with City standards.
Inlets are not to be placed in curb return.
Pipes are to be cut flush with inside wall of inlet.
Subdrain shall enter structure a minimum of one foot above invert and 2' 6" below top of
structure.
When pipe diameter exceeds 30", inlets shall not be used as junction boxes, limit 3 pipes per
inlet.
For design purposes inlet capacity should be assumed as follows:
5" Throat
Grate Inlet *
(No Wing Type *
(Single Wing Type
(Double Wing Type
- 4 CFS
- 4 CFS
- 6 CFS
- 8 CFS
* - Subject to City Engineer's approval only.
. Standard inlet wings shall be a minimum of four feet in length as per City Standards.
5. STREET DESIGN:
Generally gutter water should not be carried for distances exceeding 600 feet.
Except as where impractical, channeling water across intersections will not be allowed.
Inlet Spacing
Normal Grades - .5% up to 2% - 600 ft.
Steep Grades - greater than 2% - 400 ft.
Where grades exceed 2%, a 6' wing will be required on the inlet. Grades less than 0.5% are
subject to City Engineer's approval only. A minimum of 0.5% grade shall be required for
asphalt drives and parking lots. Right-of-way shoulders shall be sodded three feet behind
curb and remainder, graded, seeded, and mulched. Mulch to be dry or green per F.D.O.T.
current standard.
6. HEADWALLS:
.
All inlet and outlet pipes shall be provided with a headwall, mitred end section, or flared end
section. Headwalls shall be reinforced concrete. Pinned Sand/Cement bag structures built
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in accordance with City of Clearwater specifications may be permitted only for temporary
use. All outlets shall have an appropriate apron to prevent erosion.
City of Clearwater
Floodplain Management Plan
7. CHANNELS AND SWALES:
ROU2hness Coefficient - for a channel with maintained vegetation is .030 to .035.
Normal channel depth shall not be within 10% of critical depth. When velocities exceed
maximum allowable values energy dissipators shall be provided. Plans shall include
undeveloped areas, pre- development drainage, and pre-development discharge at key
design points such as channels, existing ponds, sloughs, etc. Also post-development
calculations for storm runoff and proper detention shall be determined.
Type of Soil
in Flow Line
Maximum Allowable
Velocity (f.p.s.)
.
Fine Sand
Sandy Loam
Silt Loam
Firm Loam
Fine Gravel
Stiff Clay
Coarse Gravel
Hardpan
1.5
1.8
2.0
2.5
2.5
3.8
4.0
6.0
Major channels (Q greater than 30 CFS) shall have a five foot bottom width. Drainage
swales normally will not be permitted along rear lot lines.
Swales shall be vegetated and designed for a 50 year storm.
8. STORM WATER DETENTION:
This policy is to insure that runoff will not be increased beyond its present state by
development. It is also intended to protect the quality of receiving waters in the City from
additional pollution resulting from new development. The design frequency shall be a 25
year storm based on rainfall intensity graph for the Clearwater area. The duration may be
obtained from the Rational method for areas up to 10 acres. Design variations may be
considered for areas less than one acre. The runoff coefficient differential DELTA C is
obtained by subtracting pre-development coefficient from post -development coefficient.
.
For projects greater than 10 acres, systems design must incorporate the U.S. Department of
Agriculture Soil Conservation Service Modified Unit Hydrograph, or equivalent as
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Floodplain Management Plan
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determined by the City Engineer, in conjunction with a SCS Type II Florida Modified
rainfall distribution curve.
In the case of redevelopment of land upon which no stormwater attenuation or water quality
feature exists, or upon which the existence of such features do not meet the standards
applicable at the time of redevelopment, the redeveloper will be required to provide facilities
in a manner similar to an original developer and in proportion to the extent to which the site
plan of the property is affected or disturbed by the redevelopment. In the methodology for
calculating stormflow from property undergoing redevelopment, the pre-development
volume of runoff will be calculated by the use of a Weighted Runoff Coefficient taken from
the following table:
PROPERTY DESCRIPTION*
WEIGHTED COEFFICIENT OF RUNOFF**
Undergoing redevelopment and not
contributing to an existing flooding
problem ***
1/2 Actual
Undergoing redevelopment and
contributing to an existing flooding
problem
Undergoing redevelopment and
contributing to an existing flooding
problem for which an attenuating
stormwater manage-ment project is
under construction
.20
1/2 Actual
* City Engineer shall be the determining authority of the Property Description
** In no case shall the coefficient be less than .20
** To be applied only to area of property undergoing alteration
*** Situation wherein property damage occurs in a 25 year - 24 hour storm
The City of Clearwater standards relative to the provision of water-quality features are, by
this reference, the same as the Southwest Florida Water Management District's, excepting
that where SWFWMD may rule that no water quality features are required, the City's
standard shall require the provision of treatment of 1/2 inch of rainfall as applied over the
entire area of a development project and 1/2 inch as applied over the portion of the site plan
undergoing alteration in the case of redevelopment.
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City of Clearwater
Floodplain Management Plan
t(Sec.)
~
The design hydrograph is an isosceles
triangle with a time of concentration
equal to one half of the duration.
Detention design shall incorporate
a minimum time of concentration of
one hour & a 25 year storm intensity.
The outfall shall be restricted to
accommodate the pre-development flow
with appropriate overflow facilities
for larger volumes. Detention ponds
will require OS of freeboard.
Q ----------
~Q = ~CIA
Time of
Concentration
Duration
Volume of detention may be established by multiplying time of concentration times DELTA
Q providing the outlet control structure (weir, pipe, etc.) is designed to restrict other than
pre-development Q. An outfall design allowing less than the pre-developed Q to pass is
acceptable if storage is provided.
. Discharge to Lake or Wetland
In situations where the pre-developed Q abuts a lake or wetland, the developer may store
additional runoff above that required for water quality treatment in the wetland subject
provided that the following conditions are met:
Wetland with positive outfall has the capacity to store
a 25 year design storm.
Wetland with no outfall has the capacity to store a 50
year design storm.
Wetland has sufficient capacity to absorb additional runoff.
All areas on or off site contributing to a wetland shall be included in the design. Runoff
discharging directly to the wetland shall be transmitted via grassed swales. Runoff from lots
abutting a wetland shall be collected in an interceptor swale designed to drain dry in less
than 24 hours.
The maximum design high water elevation of the wetland shall be one foot below the lowest
floor elevation around the wetland or one foot below the flow line of the nearest adjacent
road, whichever is lower. The design wetland elevation shall be determined by the inflow
and outflow hydrograph method.
.
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The impact to the wetland system will be taken into consideration when reviewing these
applications. Those areas directly outfalling tidal salt water basins will be reviewed for
water quality impacts only.
Dry Detention Systems
City of Clearwater
Floodplain Management Plan
Dry detention systems are those that under non storm conditions are dry, ie., has a grassed
bottom and side slopes that can be mowed. These systems shall be designed with no steeper
than 4:1 side slopes, preferably no deeper than three feet deep and drain dry within 24 hours
or less. The side slopes and bottom shall be sodded. Drawdown may be accomplished by
the use of underdrain according to City specifications or by percolation if the soil conditions
permit. At least one soil boring showing soil profile and the seasonal high water table shall
be provided with the site plan. The soil boring shall be located at the center of the proposed
detention area.
Wet Detention Systems
.
Wet detention/retention systems are those that under non storm conditions are designed to
have a standing pool of water. The design shall be in accordance with City Details. All wet
systems shall incorporate a vegetated littoral shelf over 35% of the areal cover of the pond
under normal conditions. Drawdown may include an underdrain system, natural percolation
or slow bleed down system. Underground vaults are not allowed as water quality facilities
and are permitable for water quantity storage only as specifically allowed by the City
Engineer.
Detention Pond Walls
The use of vertical walls on the sides of detention ponds or side slopes steeper than 4: 1
are discouraged and will not be permitted except as may be specifically approved due to
reason of undue hardship to the developer. In no circumstance will vertical walls on
detention ponds be permitted adjacent to rights-of-ways, along the boundaries of adjacent
parcels of land, on more than two sides of a detention pond, or any side of a pond serving
only as a water quality facility.
9. SUBMITTALS
In addition to submitting complete plans and specifications, the Engineer shall also
submit the following:
A. - Drainage calculations or computations including hydro-graphs for any
detention areas, retention ponds, complete with cross sections.
.
B. - A scale map or plat showing each subdivision drainage basin, as an aid for
review of the proposed work. A minimum of 50 feet of topographical survey
shall be required adjacent to the perimeter of the proposed site.
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c. - Profile of hydraulic gradient for storm pipe system.
City of Clearwater
Floodplain Management Plan
D. - All pertinent information of adjoining properties affected by stormwater from
site such as finish floor elevations of buildings, streets, channel or receiving
waters to the final outfalL All adjacent property draining onto the proposed site is
to be shown on the site plan.
Before project is accepted by the Public Works Department, a Registered Engineer must
submit written verification that the project was constructed in accordance with approved
construction plans.
10. ATTACHMENTS:
Rainfall - Intensity/Duration - Clearwater. This Rainfall Intensity Graph shall be used
for 10, 25, and 50 year storms.
Velocitv of Runoff - for use in determining intensity for above grade runoff.
Draina2e Desi2n Computations - suggested for working out drainage computations
showing required information for submittal to City of Clearwater for approval.
.
.
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Appendix L
Stormwater Management System Policy
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City of Clearwater
Floodplain Management Plan
CITY OF CLEARWATER
PUBLIC WORKS ADMINISTRATION DEPARTMENT
STORMWATERMANAGEMENT SYSTEM POLICY
Guidance Manual
Declaration and Intent:
.
. The waters of the City of Clearwater are among its basic resources and as such,
should be managed to conserve and protect these natural resources and their scenic
beauty to achieve the full beneficial use of the resource for the citizens and visitors of
the City. This manual is intended to provide water policy guidance for the
development and implementation of programs, projects, and rules and plans relating
to City water resources. This document shall not constitute "standards" or "criteria"
for which resource decisions on individual programs or projects must be made; rather
this document is intended only to be a reference guide. Specific storm drainage
design shall continue to be developed in accordance with the City Design Criteria,
codified by City ordinance. Specific goals, objectives, and policies that guide project
implementation are clearly defined by the City's National Pollutant Discharge
Elimination System (NPDES) permit, the City Comprehensive Plan Drainage Policies
(Goals No. 16 and 17), and State Water Policy and Law.
Policy Guidelines:
It shall be the policy of the Public Works Administration Department that:
I.
General Surface Water Protection and Mana2ement - The Public Works
Administration (PW A) Department shall provide an effective stormwater
management program to minimize adverse impacts on the City natural
systems, property and public health, safety and welfare for the citizens of
Clearwater. Inadequate management of stormwater increases stormwater flows
and velocities, contributes to erosion and sedimentation, overtaxes the carrying
capacity of streams and other conveyances, disrupts the functions of natural
systems, undermines floodplain management and flood control efforts in
downstream communities, reduces ground water recharge, threatens public
health and safety, and is the primary source of pollutant load to Clearwater's
natural coastal water resources. As a result, water quality is degraded and
beneficial use of the resource is lost.
.
. Effective Stormwater Management shall require Maintenance and Operation
by the City of Clearwater of drainage infrastructure, consisting of City-owned
land and land on which the City has an easement or right-of-way, for purposes
of maintaining water flow to prevent flooding of private property only.
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City of Clearwater
Floodplain Management Plan
.
. PW A surface water management programs shall protect, preserve and restore
the quality, quantity and environmental values for existing and new water
resource drainage systems to the maximum extent practicable.
. PW A stormwater management projects shall maintain, to the maximum extent
practicable, during and after construction, the pre-development stormwater
characteristics of the site; to reduce stream channel erosion, pollution,
siltation, sedimentation, and flooding; to reduce pollutant loading that
diminish beneficial uses; to reduce the loss of freshwater by encouraging
stormwater reuse, and to address stormwater management on a watershed
basis, thereby providing cost effective water quality and quantity solutions to
specific watershed problems.
. All operation and maintenance activities undertaken by PW A in City
stormwater systems, all capital improvement projects developed by PW A, and
private development projects which are reviewed in PW A within City
stormwater systems shall conform to the requirements of State Water Policy
as required by the City NPDES MS4 Permit.
. All storm water related maintenance and capital improvements shall conform
to the specific goals, objectives, and policies contained within the City
Comprehensive Plan, with particular attention being given to compliance with
prescribed Levels of Service which have been established to determine the
availability of facility capacity and demand created by new or redevelopment.
. Effective stormwater management shall require maintenance and operation of
drainage infrastructure dedicated to the City of Clearwater for purposes of
maintaining flow to prevent flooding of private property only.
. When determining the impact on water resources of the City in the
development of all stormwater related projects by PW A, staff shall consider
the impact of the facilities on water quality, fish and wildlife, environmentally
sensitive lands, reasonable-beneficial uses of water, recreation, navigation,
saltwater or pollution intrusion, and factors related to erosion and
sedimentation, public health, safety, and welfare to minimize adverse impacts.
. Stormwater facility project development shall encourage interagency
cooperation and alternate funding sources for implementation whenever
feasible.
II.
Stormwater Mana2ement Implementation The Public Works
Administration Department shall fully develop stormwater programs and
capital improvement projects with implementation success in mind.
Inappropriate implementation of stonnwater management programs and projects,
and the management of project construction, nwnitoring, reporting and related
pennit or agreement conditions can lead to ineffective and costly project delays
or imposed penalties.
.
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. The construction and operation of City stormwater facilities which manage or
store surface waters, or other facilities which drain, divert, impound, discharge
into, or otherwise impact waters in the State, and the improvements served by
such facilities, shall be consistent with all State and regional permitting
requirements.
. All storm water facilities project development shall meet applicable design or
performance standards, with particular attention being given to whether
adequate provisions exist for the continued satisfactory operation and
maintenance of the planned facilities after construction has been completed.
. All stormwater facilities and related improvements must provide adequate
provision to avoid increased damage to off-site properties, water resources,
natural systems or the public caused by: (I) floodplain development,
encroachment or other alteration; (2) retardant, acceleration or diversion of
flowing water; (3) reduced natural attenuation; (4) lack of adequate
maintenance access; (5) facility failure; or (6) other actions that could
adversely affect off-site water flows or levels.
. All storm water facility repairs shall be performed in a manner that does not
exacerbate existing stormwater problems.
. Erosion and sediment control plans detailing appropriate methods to retain
sediment on-site shall be required for all land disturbing activities. Sediment
control plans shall be fully implemented and maintained during construction.
. Where conflicts may reasonably be expected to exist between public and
private stormwater facilities during commercial site plan review, resolution of
those conflicts shall be resolved by the Capital Improvements Stormwater
Management Committee.
. There shall be within PW A, a Capital Improvements Stormwater Management
Committee that shall meet at least quarterly and be made up of at least two
representatives from ESM, Production, Public Services, Construction
Inspection, and the Public Works Administration Controller. The purpose of
this Committee is to consider significant operational issues, address policy
changes needed to facilitate stormwater management for the City that need to
be recommended to the Public Works Administrator, and to establish capital
project recommendations to the Public Works Administrator annually, by
January, each year, to be included into the department operating budget.
. Stormwater system management in Clearwater shall be categorized as either
Stormwater Maintenance Operation or Stormwater Capital Improvements.
Stormwater Maintenance Operation shall be funded as a line item while
Stormwater Capital Improvements shall be funded as discrete projects based
on annual prioritization through the annual watershed management planning
and evaluation process, subject to recommendation by the Capital
Improvements Stormwater Management Committee annually, and approved
by the Public Works Administrator.
City of Clearwater
Floodplain Management Plan
.
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. Administration of the Stormwater System shall be facilitated by a geographic
information system database that shall be created and maintained by
Engineering with direct input by Public Services.
. A rainfall, water quality, and flow monitoring network shall be installed and
maintained by Engineering for the purposes of model calibration, monitoring
system response, and permit program compliance (NPDES & Tampa Bay
Estuary Program).
. Engineering shall maintain a current and calibrated hydrologic/hydraulic
model for the monitoring of existing conditions the evaluation of proposed
alternative solutions to stormwater problems.
City of Clearwater
Floodplain Management Plan
III.
Stormwater Maintenance Operation - The establishment of these
maintenance policies for Public Services is critical to the overall effectiveness
of unit operation and accountability, and will serve as a guide to meeting the
compliance requirements of NPDES to further enhance the present MS4
system operation and maintenance programs.
.
. NPDES Permit Compliance: Procedures for maintenance of roadways and
stormwater runoff shall operate in compliance with NPDES, MS4 Permitting.
. Stormwater Ponds: Lake/Pond maintenance operation shall be restricted to
City owned systems or those portions of systems owned by the City only, and
shall be limited to only those controls needed to satisfy an immediate
problem, system operation, or to comply with provisions of agreement to
remove silt and/or nuisance or exotic plant species where all appropriate
licenses, permits, or exemptions have first been obtained. PW A shall not be
responsible for maintenance of private lakes or ponds. All repair work shall
be recorded on appropriate forms.
. Conveyance Systems: Shall not be enlarged or enhanced from the existing
condition without prior approval from Engineering. Repairs and installation
of equivalent pipe(s) shall be limited to a maximum of 200 feet in length and
up to 24 inches in maximum diameter, no deeper than 5 feet (Sub-drain and
storm pipes). Ditches, swales, and channel creeks shall be maintained within
their original design parameters through silt removal and ditch bank grading
on a frequency of no less than once every five years. Ditch cleaning and
cutting shall occur twice a year. Stormwater pipe cleaning by machine such as
Vactor and hand rods shall be on a continuous basis.
. Inlets, Curbs and Gutters: Street sweeping operations shall occur on all
residential streets twice a year. Some areas of the City may be addressed
more frequently than others at the discretion of the Public Works
Administrator. Street sweeping all City main arterials shall occur on a
continuous basis. Curbs and gutters shall be maintained in accordance with
"As-Built" conditions with replacement being completed as maintenance by
Public Service crews for run-lengths less than 200 feet. All ADA ramps are to
.
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.
.
IV.
.
City of Clearwater
Floodplain Management Plan
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be maintained throughout the City with proper grade slope and landing.
Design of inlets, catch basin boxes, and silt boxes shall be within these
established maintenance guidelines. Whenever possible, inlets and catch
basins shall not be installed within sidewalks.
. Paved and Unpaved Streets: Maintenance and operational reporting shall be
reported, as defined under Stormwater Management Implementation
guidelines. Litter control shall be provided by Public Services on only those
streets that maintain an active "Adopt-A-Street" or an "Adopt-A- Pond"
Program.
. Drainage Easements: Maintenance and operation of City lakes and streams
rights-of-way and easements and associated City stormwater facilities shall be
the responsibility of Public Services.
. Citizen Support: Public Services shall be the point of first contact by citizen
response requests to investigate stormwater problems in Clearwater. Public
Services shall record and respond to all citizen requests for inspection of a
problem within 48 hours of receipt (Attachment A: Form). Response shall
either include a maintenance resolution or follow-up request in writing to
ESM for further investigation as a potential candidate to capital improvement.
. Stormwater Certification:. All PW A employees working with stormwater
and drainage shall be certified in sedimentation and erosion control.
Furthermore, it shall be a requirement that all Public Services stormwater
personnel are "C" licensed and/or sedimentation erosion control certified
stormwater technicians within two years of hire.
Stormwater Capital Improvements - The City Comprehensive Plan requires
that stormwater management be implemented in the most cost effective and
efficient manner possible. For that reason, the City has developed a
Watershed Management Action Plan, intended to not only prevent existing
water resource problems (Quantity & Quality) from becoming worse, but
also to reduce existing flooding problems, to improve existing water quality,
and to preserve or restore the values of City natural ecosystems. Therefore,
all stormwater related problems that are not defined as Stormwater
Maintenance and Operation shall be considered as a Stormwater Capital
Improvement and shall be prioritized (Attachment B: Priority) and funded
in accordance with the City Watershed Management Action Plan annually.
This shall be accomplished upon recommendation by the Capital
Improvements Stormwater Management Committee and approved by the
Public Works Administrator, City Manager and City Commission.
. All projects received by ESM shall be evaluated and ranked according to the
problem classification established by the City Watershed Management Action
Plan and included in the project database for quarterly review by the Capital
Improvements Stormwater Management Committee. Category Code and
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Watershed Basin shall sort all projects provided to the Committee for their
review and approval.
. Implement project development and construction in accordance with
Committee recommendations and appropriate City approvals.
City of Clearwater
Floodplain Management Plan
V. EMERGENCY PROVISIONS - There shall come from time to time, those
situations which result from unforeseen circumstances that shall require
PW A staff the flexibility to accommodate resolution of an immediate
problem. Implementation of any project relative to this section shall be
recommended by the Capital Improvements Stormwater Management
Committee and approved by the Public Works Administrator, whenever:
.
. The Florida Department of Environmental Protection has declared a shoreline
emergency, consistent with Chapters 62B-33.014 or 62B-49.009.
. A project requires immediate action to protect life and property, provided that
EITHER condition exists:
=> The condition of any storm water management system, dam,
impoundment, reservoir, appurtenant work, or works is so dangerous
to the safety of life or property as not to permit time for the issuance
and enforcement of an order relative to maintenance or operation; OR
=> The condition of passing or imminent floods that threaten the safety of
any stormwater management system, dam, impoundment, reservoir,
appurtenant work, or works; AND
THE FOLLOWING GUIDELINES ARE ALSO TRUE:
. There are no operational changes appropriate or available to alleviate the
emergency.
. The project will not result in the creation of any new lands or permanent
structures that did not exist before the emergency.
. Project construction is minimized to only that which is absolutely necessary to
prevent the imminent collapse of a structure or ameliorate circumstances that
threaten human safety or life.
. An after-the-fact permit shall be required for all work completed that clearly,
is not temporary in nature.
Public Works Administrator
City Engineer
.
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City of Clearwater
Floodplain Management Plan
CITIZEN COMPLAINT/PROJECT REVIEW PROCESS
1. Citizen Call in Complaint
2. Complaint to Transportation and Drainage
Go To 2.
Go To 3.
3. Transportation and Drainage Determine Go To 5.
Complaint is a Maintenance Issue.
4.
Transportation and Drainage Determines
Complaint is not a Maintenance Issue
Resolve Maintenance Issue
Complaint and Citizen Response Form
submitted to ESM.
5.
6.
ESM and Production inspect Problem Site.
Problem Determined to reqUIre R&R
Solution.
9. Problem Determined to reqUIre ESM
Solution.
7.
8.
.
.
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Stop
Go To 7.
Go To 8.
153
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City of Clearwater
Floodplain Management Plan
.
Appendix M
Clearwater Comprehensive Plan, Stormwater Subelement
.
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City of Clearwater
Floodplain Management Plan
Stormwater Management Sub-Element
The following summarizes the Stormwater management Sub-Element
.
Stormwater Management
· The City of Clearwater needs to continue to monitor the stormwater management
utility fee rate structure and amend it as required to remain competitive and maintain
an adequate funding source to provide revenue for flood control, maintenance,
retrofitting, and treatment of stormwater. In addition to the hydraulic improvements,
this would improve the quality of stormwater discharging into surface waters, and
will complement the measures proposed in the Surface Water Improvement and
Management (SWIM) program and the Tampa Bay National Estuary Program to
improve surface water quality standards.
· The City of Clearwater needs to take advantage of any altemati ve funding
opportunities that may become available from any State agency with regard to
watershed management and/or general stormwater improvements.
· The City of Clearwater needs to continue to reduce flooding problems and strive for
abatement of flood damage to houses and streets.
· The City of Clearwater needs to continue to coordinate stormwater management
improvement efforts with Pinellas County and other incorporated areas adjacent to
Clearwater City limits for both water quality and attenuation.
· The City of Clearwater needs to continue to maintain, correct deficiencies and
improve, where necessary, current levels of service. Maintenance and improvement
of the City stormwater management system must be recognized as a service provided
by the City on a regular and continuous basis.
· The City of Clearwater needs to continue to prepare stormwater management plans
which will identify and prioritize the implementation of programs to improve and
enhance stormwater quality and quantity.
· Natural and man-made wetlands need to be utilized for stormwater storage and
protected as natural resources. Wetlands provide a natural wildlife habitat and
groundwater recharge functions, which are pivotal characteristics of the natural and
urbanized environment. Such features are firmly established within Clearwater's
quality of life values.
· The City of Clearwater must continue to obtain appropriate permits from all
environmental regulatory agencies prior to implementation of water resource projects.
· The City of Clearwater needs to research and develop new methods that are
technically, environmentally, and economically viable of treating stormwater runoff
before final discharge to improve and enhance local surface waters.
· The city needs to proceed forward in its planning, design and engineering of the
proposed downtown lake which has been included in the City's twenty year
Downtown Redevelopment Plan. The proposed lake will serve as a basin for
stormwater attenuation and water quality management, as well as enhancing the
aesthetic beauty of the downtown area.
.
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City of Clearwater
Floodplain Management Plan
· The City of Clearwater needs to continue to participate in the National Flood
Insurance Program's Community Rating System (NFIP/CRS). Clearwater has been an
active participant since 1990.
STORM WATER
16. GOAL - PROVIDE THE MOST COST EFFECTIVE AND EFFICIENT
PROVISION OF STORMWATER MANAGEMENT INCLUDING THE
IMPROVEMENT AND ENHANCEMENT OF STORMWATER QUALITY
DISCHARGING INTO LOCAL RECEIVING WATERS, AND PROVIDE
MAXIMUM PRACTICAL PROTECTION TO PERSONS, PROPERTY, AND
THE NATURAL ENVIRONMENT.
16.1 Objective - To maintain adequate levels of service for existing and future
populations through the year 2010.
.
Policies
16.1.1 The following Level of Service standards have been established for the City of
Clearwater and shall be used in determining the availability of facility capacity and the
demand created by new development and shall be applied to all new development,
redevelopment, and for all City facilities through 2010. Service Level of Service
Standards Stormwater Management Design storm facilities 10 - year storm frequency for
all new street development using the rational design method. 25 - year storm frequency
with positive outfall for major storm systems with basin time of intensities controlling the
duration. * 50 - year storm frequency when no outfall and discharge is to street right -of-
way.*
100 - year storm frequency when no outfall and discharge is across private property. *
* Design standards for stormwater quality treatment/storage quantity shall conform to the
current SWFWMD requirement [Presently being the SCS Unit Hydrograph design
method, using the design storm frequency and a twenty-four (24) hour duration for sites
ten (10) acres or more, and the rational design method for sites under ten (10) acres].
16.2. Objective -The City of Clearwater shall continue to develop watershed
management plans which should seek to identify, evaluate and implement the most
cost effective and cost efficient programs for stormwater management, including
stormwater quantity and quality. These plans should also address any projects
included in the Pinellas County Stormwater Management Plan (SWMP) for the
implementation of all stormwater management, as well as recommended funding
sources.
Policies
.
16.2.1 Coordinate and cooperate with appropriate local, State, regional, and Federal
agencies implementing the Pinellas County and City of Clearwater stormwater
management plans.
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City of Clearwater
Floodplain Management Plan
16.2.2 Continue to Provide a stormwater management system throughout the City that
will afford the most economically feasible protection to residents and property.
16.2.3 All stormwater management improvements should seek to meet applicable goals,
guidelines, and regulations established to provide flood protection and pollution
abatement.
16.2.4 Participate in interlocal agreements to study and evaluate stormwater quality and
stormwater runoff management issues.
16.2.5 Coordinate and cooperate with Southwest Florida Water Management District
policies and regulations.
16.2.5 Continue to require new development to detain water on site and control quantity,
quality, and rate of flow being released into the receiving drainage systems.
16.3 Objective - Lower highwater profiles during storm events, as necessary, to
reduce house flooding occurrences and to lessen the resulting adverse effects on
public health, the natural environment, public and private property.
.
Policies
16.3.1 Continue to provide a program of regular maintenance to the stormwater
management system to ensure maximum efficiency and performance. Ensure that
stormwater management plans include measures to remove trash, sedimentation and other
debris which impede flow and incorporate structural and non-structural measures to
reduce or eliminate the discharge of oil, grease, heavy metals, and other suspended
particles into the stormwater management systems.
16.3.2 Natural and man-made wetlands shall be considered as a means to provide
stormwater management wherever possible and shall be maintained for hydrologic
purposes. The efficiency of natural and man-made systems to convey stormwater runoff
shall be protected through the provision of routine water quality maintenance schedules
overseen by city inspections.
16.3.3 Continue to provide multiple use facilities, such as recreational open space uses,
with open channel stormwater management systems, when appropriate.
16.3.4 Development and redevelopment activities shall comply with all stormwater
management design standards and criteria.
16.3.5 Structural Development shall be prohibited where it is determined that such
development will have an adverse impact on stormwater storage areas, increase flood
prone areas, significantly increase rates of runoff, or cause other unfavorable drainage
conditions. Both man-made and natural systems shall be treated on an equal basis as a
sensitive preservation area; no distinction shall be made between a natural system and a
man-made or man altered hydrologic system.
16.3.6 Prohibit new building, development or construction that will result in building(s)
constructed within/or over stormwater retention/detention ponds, streams or channels. All
wetlands, streams, channels, or other hydrologic features, whether wetlands, ponds or
bodies of water having intrinsic hydrologic, biologic and zoological functions with no
distinction made in regard to its status to whether it is man-made or natural shall be
.
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considered for a Preservation Land Use Plan classification to ensure protection from
development.
16.3.7 Continue active participation and cooperation with the National Hood Insurance
Program and the Horida Emergency Management Agency for the purpose of recognizing
flood prone areas, and establishing abatement programs that endeavor toward a reduction
in damages and losses due to flooding.
16.3.8 Continue the established requirement of a twenty-five foot setback from the tops
of a bank rom all wetlands whether natural or man-made, and require finished floor
elevations in areas adjacent to lakes, bays, creeks, the Gulf of Mexico, Tampa Bay and
Old Tampa Bay, and other flood prone areas.
City of Clearwater
Floodplain Management Plan
16. 4 Objective Continue the implementation of the most cost effective and efficient
plan to reduce the occurrence of street flooding where safety issues and traffic
problems exist as prioritized and set forth in the Capital Improvement Element, and
listed in the stormwater management plans.
.
Policies
16.4.1 Identify areas where inadequate stormwater management easements exist, and
obtain proper access to stormwater management channels, structures and appurtenances
for maintenance purposes. 16.4.2 Improve all street stormwater management systems
where deficiencies exist.
16. 5 Objective - Protect and enhance the quality of receiving waters by the use of
"Best Management Practices" in accordance with the adopted watershed
management plans.
Policies
16.5.1 The use of "Best Management Practices" shall be required before, during, and
after construction activities to prevent water pollution resulting from erosion and
siltation.
.
16.5.2 Vegetated swales, sodding, and appropriate landscaping will be required as
components of the drainage system for natural filtration before final discharge into
receiving waters.
16.5.3 Monitor major stormwater management outfalls and receiving water bodies to
identify the quality of stormwater runoff and the impact on receiving bodies.
16.5.4 Maximize water recharge potential in designing stormwater management
improvements by utilizing natural wetland areas for stormwater storage.
16.5.5 Coordinate stormwater management improvements with other local governments
to assist in solving stormwater management problems of an extraterritorial nature.
16.5.6 Continue to Identify impaired bodies of water and prioritize them for improvement
and enhancement.
16.5.7 Water resource projects shall be consistent with the policies of the Conservation
Element and with adopted watershed management plans.
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City of Clearwater
Floodplain Management Plan
16.5.8 All stormwater management plan projects of the City of Clearwater shall comply
with the Aorida Surface Water Improvement and Management (SWIM) program and the
National Estuary Program.
16.5.9 The City of Clearwater shall continue to upgrade and retrofit City-owned drainage
system facilities and include stormwater treatment for water quality in accordance with
the proposed stormwater management plan.
16. 6 Objective - Continue to Provide sound fiscal management of the stormwater
management systems to include maintenance, operation, and construction in
accordance with the watershed management plans and concurrent with its
implementation.
Policies
16.6.1. Operation and maintenance of the stormwater management systems may be
financed through revenues supporting the City's general fund or as otherwise funded as a
utility operation.
16.7 Objective - Provide economic development incentives that promote water
resource protection and enhancement.
.
Policies
16.7.1 Methods of financing stormwater management system improvements and new
stormwater infrastructure construction should be evaluated to determine the most feasible
and equitable arrangement, both city-wide and in local problem areas.
16.7.2 The City of Clearwater shall continue to seek and be on notice of financial support
for system improvements through grant programs administered by appropriate State and
Federal agencies.
16.7.3 The City of Clearwater shall pursue a system of regional stormwater management
which is both economically and environmentally sound.
17. GOAL - DISCHARGES OF STORMWATER SHALL BE MANAGED TO
PROVIDE FLOOD PROTECTION FOR THE CITIZENS OF THE CITY OF
CLEARWATER AND TO PRESERVE, PROTECT, AND ENHANCE THE
WATER QUALITY OF RECEIVING WATERBODIES.
17.1 Objective - The protection, restoration, and enhancement of water quality
associated with stormwater runoff will be considered a function of the City's overall
stormwater management plans.
.
Policies
17.1.1 The City shall incorporate water quality protection and enhancement criteria into
the City stormwater management plans.
17.1.2 The use of natural alternatives, the conservation of natural storm water
management systems, and the protection and improvement of the quality of receiving
waters shall be a goal of the City's stormwater management plans.
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17.1. 3 Management plans shall continue to be developed on an ongoing basis for
waterbodies with known or suspected water quality problems in the City to include
Tampa Bay, Clearwater Harbor, Stevenson Creek, Allen's Creek, and Alligator Creek.
17.1.4 The City shall systematically and timely prepare watershed or waterbody specific
management plans for waterbodies within the City. Such plans shall include both water
quality and flood control considerations and recommended funding sources.
17.1.5 The City shall implement all City-approved watershed management plans.
17.1.6 All City stormwater management plan projects within watersheds of The City shall
comply with applicable SWIM Plans for that waterbody or watershed.
17.1. 7 The City shall continue to coordinate with and supplement the County's surface water
monitoring program.
City of Clearwater
Floodplain Management Plan
.
.
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City of Clearwater
Floodplain Management Plan
.
Appendix N
Application for Non-Substantial DamagelImprovement Review
.
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City of Clearwater
Floodplain Management Plan
City of Clearwater
Development Services Department
100 South Myrtle Avenue, Clearwater, FL 33756
Phone (727)-562-4567 Fax (727) 562-4576
NON-SUBSTANTIAL DAMAGE/IMPROVEMENT REVIEW
Parcel Number:
Property Address:
Owner's Name:
Co-Owner's Name:
Owner's Mailing Address:
Owner Phone Number:
FIRM Panel:
Flood Zone:
BFE:
.
Lowest Floor Elevation (excluding garage):
I am attaching an appraisal report of my property, or
I am not submitting an appraisal report of my property
I accept the County's Estimated Market Value.
Initials
Initials
Initials
I accept the attached estimated cost of construction as a fair cost of repair or improvement for my home.
Initials
SIGNATURES:
Owner:
Date:
Co-Owner:
Date:
Contractor:
Date:
.
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City of Clearwater
Floodplain Management Plan
SUBSTANTIAL IMPROVEMENTIDAMAGE
NOTICE TO PROPERTY OWNERS
Rebuilding your home after the stonn?
Adding on, renovating or remodeling your home?
Here is information YOU need to know about the 50% Rule.
If your home or business is below the 100-year flood elevation, Clearwater has flood
damage prevention regulations that may affect how you remodel, renovate, or add on to
your building. If your home or business sustained structural and or interior damage, these
regulations may affect how you rebuild. These laws are required by the National Flood
Insurance Program to protect your lives and investment from future flood damages. Your
community must adopt and enforce these laws in order for federally-backed flood
insurance to be made available to community residents and property owners.
Inform yourself and save time, aggravation, and money. Please read the following
information.
.
Substantial Dama2e means damage of the origin sustained by a structure whereby the
cost of restoring the structure to its before damaged condition would equal or exceed 50
percent of the market value or replacement cost of the structure before the damage
occurred. (Note: the cost of the repairs must include all costs necessary to fully repair the structure to its before-damage
condition. )
Substantial Improvement means any reconstruction, rehabilitation, addition, or other
improvement of a structure, the cost of which equals or exceeds 50 percent of the market
value of the structure before the "start of construction" of the improvement.
If a building is "substantially damaged" or "substantially improved", it must be brought
into compliance with Clearwater's flood damage prevention regulations, including
elevating the building to or above the 100-year flood elevation.
Clearwater, following National Flood Insurance Program requirements, has the
responsibility to determine "substantial damage" and "substantial improvement" and has
implemented the following procedure to do so:
1. Development Services will estimate Market Value by using the tax assessment
value of your structure (excluding the land).
.
If you disagree with this estimate of Market Value, you may hire a state
licensed appraiser and submit a comparable property appraisal for the
depreciated value of the structure.
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2. You must submit to Development Services a detailed and complete cost
estimate for the addition, remodeling, reconstruction, or repair of all damages
sustained by your home, prepared and signed by a licensed general contractor.
The contractor and you must sign separate reconstruction or improvement
affidavits indicating that the costs estimate submitted includes all dama2es or
all improvements to your home, not just structural.
City of Clearwater
Floodplain Management Plan
Development Services will evaluate the cost of improvements or repairs and
determine if they are fair and reasonable. For damage repairs, pre-storm
prices and rates will be utilized. The cost of improvements or repairs does not
include items not considered a permanent part of the structure. (i.e., Plans.
surveys, permits, sidewalks, pools, screens, gazebos. fences. etc.) (See attached copy.)
.
3. If your home is in the designated flood zone, then an Elevation Certificate
must be submitted to determine the lowest flood elevation. Garages and
carports are not considered the "lowest floor".
4. Substantially damaged or substantially improved structures with the lowest
floor below the 100-year flood elevations are required to be elevated to or
above that level. Likewise, all electrical and mechanical equipment (heating
and cooling, etc.), bathrooms, and laundry rooms must be elevated to or above
the 100-year flood level. Only parking, building access, and limited,
incidental storage is allowed below the flood level. Non-residential buildings
may be "flood-proofed" instead of being elevated.
If the lowest floor, electrical and mechanical, equipment, laundry and
bathroom are already above the 100-year flood elevation, the building can be
repaired and reconstructed without further modifications.
5. Building plans must be prepared to show how the building is to be elevated.
These plans must be prepared and certified by a registered professional
engineer or architect.
6. Following a Presidential disaster declaration, the Small Business
Administration may make loans available for both homes and businesses for
purposes of elevating the structure to or above the l00-year flood elevation.
Proof of "substantial damage" from Clearwater Development Services is
required.
ITEMS TO BE INCLUDED
All structural elements including:
.
Spread or continuous foundation footings and pilings
Monolithic or other types of concrete slabs
Bearing walls, tie beams and trusses
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Wood or reinforced concrete decking or roofing
Floors and ceilings
Attached decks and porches
Interior partition walls
Exterior wall finishes (e.g., brick, stucco, or siding) including painting and
decorative moldings.
Windows and doors
Re-shingling or re-tiling a roof
Hardware
City of Clearwater
Floodplain Management Plan
All interior finish elements, including:
Tiling, linoleum, stone, or carpet over sub-flooring
Bathroom tiling and fixtures
Wall finishes, e.g., drywall, painting, stucco, plaster, paneling, marble, or other
decorative finishes.
Kitchen, utility, and bathroom cabinets
Built-in bookcases, cabinets, and furniture
Hardware
.
All utility and service equipment, including:
HV AC equipment
Repair or reconstruction of plumbing and electrical services
Light fixtures and ceiling fans
Security systems
Built-in kitchen appliances
Central vacuum system
Water filtration, conditioning or re-circulation systems
ALSO:
Labor and other costs associated with demolishing, removing or altering building
components
Overhead and profit
ITEMS TO BE EXCLUDED
Plans and specifications
Survey costs
Permit fees
.
Debris removal (e.g., removal of debris from building or lot, dumpster rental, transport fees to
landfill and landfill tipping fees), and clean-up (e.g., dirt and mud removal, building dry out, etc.).
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Items not considered real property such as: throw rugs (carpeting over finished floors), furniture,
refrigerators, stove not built-in, etc.
City of Clearwater
Floodplain Management Plan
Outside improvements, including:
Landscaping
Sidewalks
Fences
Yard lights
Swimming pools
Screened pool enclosures
Sheds
Gazebos
Detached structures (including garages)
Landscaping irrigation systems
ITEMS REQUIRED TO DETERMINE
SUBSTANTIAL DAMAGE:
.
APPLICANTS MUST SUBMIT THE FOLLOWING (Make sure you have extra copies for your
ftles)
1. Completed application
2. Detailed cost of improvement/reconstruction estimate and affidavit, signed by
a general contractor and a copy of his license certificate.
3. Elevation certificate
4. Current photos, or photos before and after the storm (if available)
5. Existing floor plan drawing (if available)
6. Owner's reconstruction improvement affidavit signed and dated.
7. Contractor's reconstruction improvement affidavit signed and dated.
.
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City of Clearwater
Floodplain Management Plan
GUIDELINES TO COMPLETE THE ATTACHED
RECONSTRUCTION IMPROVEMENT COST ESTIMATE
Reconstruction/Repair = Percentage of item that must be repaired or reconstructed.
(Example: The home has 20 windows, only 10 were damaged and being replaced; ratio should equal 50%)
ITEMS COST RECONIREPAIR OFFICIAL
RATIO OF USE
WORK
LABOR + MATERIALS
Concrete, Form, ETC $4,500.00 40%
Carpentry Material (r) $9,004.00 100%
Doors/Windows. Shutters $2.046.00 50%
.
.
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City of Clearwater
Floodplain Management Plan
ARCHITECTIENGlNEER
RECONSTRUCTIONIIMPROVEMENT AFFIDA VIT
Parcel #:
/
/
/
/
/
Property Address:
Architect Name:
License #:
Address:
Phone:
I have reviewed the contractor's list of work to be done with the plans prepared by my
office. The list accurately reflects the scope of work indicated on my plans and
specifications. The proposed estimated cost is in line with current average industry
standards for the work reflected in my plans and specifications.
See Attached Itemized List
.
Total Labor and Materials
Overhead & Profit
$
$
Total
$
AFFIDA VIT
STATE OF FLORIDA
COUNTY OF PlNELLAS
PERSONALLY APPEARED before me, the undersigned authority,
who, being duly sworn, deposes and says that he/she has read, understands, and agrees to
comply with all of the aforementioned conditions.
Architect/Engineer's Signature
Date
SWORN TO AND SUBSCRIBED before me this
A.D.
day of
Notary Public-State of Florida
.
Commission Expiration Date
ESTIMATED COST OF RECONSTRUCTION/IMPROVEMENT
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City of Clearwater
Floodplain Management Plan
Parcel #
Property Address:
/
/
/
/
/
This Cost Estimate of Reconstruction/Improvement must be prepared and signed by a licensed General Contractor
COST RECONIREPAIR OFFICIAL
ITEMS RATIO OF WORK USE
LABOR + MATERIALS
Concrete Form ETC
Carnentrv Material (roul!h)
Caroentrv labor (roUl!h)
Roofing
Insulation & Weather Strin
Exterior Finish (stucco)
Doors. Windows & Shutters
Lumber Finish
Caroenter labor (fmish)
Hardware (finish)
Hardware (roul!h)
Cabinets (built-in)
Floor coverinl! Ctile/rul!)
Plumbinl!
Showerrrubrroilet
Electric al
Light Fixtures
Built-in Annliances
HVAC
Paint
Demolition and Removal
Overhead and Profit
TOTAL
(PLEASE ATTACH ANY ADDITIONAL INFORMATION)
Contractor Name:
Contractor Lie.
Address:
Phone #:
Signature:
Date:
CONTRACTOR
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Floodplain Management Plan
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RECONSTRUCTIONIIMPROVEMENT AFFIDAVIT
Parcel #:
/
/
/
/
/
Property Address:
Contractor Name:
License #:
Address:
Phone:
I attest that I, or a member of my staff, personally inspected the above mentioned
property and produced the attached itemized list of repairs, reconstruction and/or
remodeling. This list is submitted for a Substantial Damage or Improvement Review.
These damageslimprovements are ALL OF THE DAMAGES/IMPROVEMENTS
sustained by this structure, and that all additions, improvements or repairs proposed on
the subject building are included in this estimate.
I understand that I am subject to enforcement and penalties if an inspection of the
property reveals that I have made repairs or improvements NOT INCLUDED ON THE
ATTACHED LIST. This includes any non-conforming or illegal structures/additions, or
repairs made to the existing structure without having presented plans for such work. I
understand that any permit issued by the City of Clearwater pursuant to this affidavit does
not authorize the reconstruction, repair or maintenance of any illegal additions, fences,
sheds, or non-conforming uses or structures on the subject property.
See Attached Itemized List
Total Labor and Materials
Overhead & Profit
$
$
Total
$
AFFIDA VIT
STATE OF FLORIDA
COUNTY OF PINELLAS
Before me this day personally appeared
who, being duly sworn, deposes and says that he/she has read, understands, and agrees to
comply with all of the aforementioned conditions.
Contractor's Signature
Date
SWORN TO AND SUBSCRIBED before me this
day of
Commission Expiration Date
Notary Public-State of Florida
OWNER
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City of Clearwater
Floodplain Management Plan
RECONSTRUCTIONIIMPROVEMENT AFFIDA VIT
Parcel #:
/
/
/
/
/
Property Address:
Contractor Name:
License #:
Address:
Phone:
I attest that I, or a member of my staff, personally inspected the above mentioned
property and produced the attached itemized list of repairs, reconstruction and/or
remodeling. This list is submitted for a Substantial Damage or Improvement Review.
These damages/improvements are ALL OF THE DAMAGES/IMPROVEMENTS
sustained by this structure, and that all additions, improvements or repairs proposed on
the subject building are included in this estimate.
I understand that I am subject to enforcement and penalties if an inspection of the
property reveals that I have made repairs or improvements NOT INCLUDED ON THE
ATTACHED LIST. This includes any non-conforming or illegal structures/additions, or
repairs made to the existing structure without having presented plans for such work. I
understand that any permit issued by the City of Clearwater pursuant to this affidavit does
not authorize the reconstruction, repair or maintenance of any illegal additions, fences,
sheds, or non-conforming uses or structures on the subject property.
See Attached Itemized List
Total Labor and Materials
Overhead & Profit
$
$
$
Total
AFFIDA VIT
STATE OF FLORIDA
COUNTY OF PINELLAS
Before me this day personally appeared
who, being duly sworn, deposes and says that he/she has read, understands, and agrees to
comply with all of the aforementioned conditions.
Date:
Owner's Signature
Co-Owner's Signature
SWORN TO AND SUBSCRIBED
before me this
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City of Clearwater
Floodplain Management Plan
Notary Public-State of Florida
Commission Expiration Date
172
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