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ORDINANCH NO. 4163-80
AN ORDINANCE OF THE CITY OF CLEARWA'TER, FLORIDA,
RELATING TO EROSION AND SILTATION CONTROL; CREATING
CHAPTER 1010 CODE OF ORDINANCES, TO ESTABLISH MINIMUM
CRITERIA AND DESIGN GUIDELINES FOR ALL LAND
DEVELOPMENT PROJECTS REQUIRING A CITY BUILDING PERMIT
IN ORDER TO ACHIEVE EFFECTIVE EROSION AND SEDIMENT
CONTROL AND MINIMIZE THE IMPACT OF LAND DEVELOPMENT
ON STORM AND SURFACE WATER SYSTEMS; PROVIDING AN
EFFECTIVE DATE.
BE IT ORDAINED BY THE CITY COMMISSION 0F'THE CITY OF
CLEARWATER, FLORIDA:
Section 1. Chapter 101, Code of Ordinances, consisting of Sections 101.01
through 101.03, is created to read:
CHAPTER 101. EROSION AND SILTATION CONTROL
Section 101.01. Purpose. The purpose of this chapter is to achieve effective
erosion and sediment control within the City; minimize the impact of land alteration,
development and construction activities on storm and surface water systems; maintain
the hydrologic balance of watersheds and watercourses; protect the public health,
safety and welfare; and conserve wildlife and aquatic habitats.
Section 101.02. Definitions. As used in this chapter:
(a) "Buffer" or "buffer strip" means an area of land around the perimeter of a
site, usually vegetated and left in Its natural state during construction, that is
intended to stop the transport of soil and debris off the site during land alteration
activities. This area is usually landscaped after major site work Is completed.
-(b) "Channel" means any natural or man-made stream, ditch or other open
watercourse that conveys water.
(c) "City Engineer" means either the City Engineer or his designee.
(d) "Clearing" means the act of removing vegetation or an existing impervious
surface (such as, but not limited to, asphalt, concrete, or buildings) such that bare
earth or other erodible surface is exposed to the elements.
(e) 'tDenuded" means stripped of vegetation or other soil cover.
(f) "Detention area" :Weans an excavated area, usually on the low end of the
site, intended to temporarily store stormwater runoff generated by the new
development.
(g) "Erosion" means the wearing away of the land surface by running water,
wind, vehicular traffic or gravity.
FOR AFFIDAVIT SE-11:
ORD.
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Ord. 4163-86
a? 5/15/86
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(h) "Grubbing" means the removal of any typo of rooted vegetation from land
by digging, raking, dragging or otherwise disturbing the roots of such vegetation and
the soil in which such roots are located.
(i) "Mulch" means a natural layer of plant residue, such as straw, covering the
land surface, which conserves moisture, holds soil In place, aids in establishing plant
cover, and minimizes temperature fluctuations.
0) "Retention area" means an excavated stormwater holding area which has
no designed discharge.
(k) "Runoff" is a term generally used to describe the quantity of stormwater
that is unable to soak into the ground due to the presence of impermeable cover and
which flows overland followng a storm to a lower elevation.
(1) "Sediment" or "silts". means solid material, both mineral and organic, that is
in suspension, and is usually being transported from its site of origin by air, water or
mechanical means.
(m) "Sedimentation" or "siltation" means the process by which mineral or
organic matter is removed from its site or origin, transported, and subsequently
deposited by air, water or mechanical activities.
(n) "Sediment basin" means a temporary depression formed through
construction of a barrier or dam or by excavation, the purpose of which is to retard
the movement of and trap sediment, silt and debris during construction or other land
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alteration activities.
(o) "Swale" means a shallow channel, usually sodded and generally dry except
during and Immediately after a rainfall event, intended to transport runoff to a larger
stormwater conveyance system.
Section 101.03. Minimum Criteria and Design Guidelines.
The following erosion control standards and procedures shall apply to all. land
development projects which require a City building permit:
(a) Plan Review. All erosion control methods to be employed during
construction shall be shown on the final construction plans submitted for approval to
the Public Works Department.
(b) Clearing and Grubbing Permits. Any project requiring any clearing,
grubbing, or any form of land alteration shall be required to have a clearing and
grubbing permit prior to the commencement of such work.
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(c) Stabilization of Denuded Areas. No disturbed area may be left denuded,
and every disturbed area must be covered by mulches such as straw, hay, filter fabric,
seed and mulch, sod, or other approved material to the extent necessary to cover
otherwise denuded areas, unless the City Engineer determines that the circumstances
do not require such covering. Within sixty (60) 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 according to the original construction plan,
whether by impervious surface or landscaping.
(d) Protection and Stabilization of Soil Stockpiles. Soil stockpiles shall be
protected at all times by onsite 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.
(e) Protection of Existing Storm Sewer Systems. During construction, all
storm sewer inlets receiving drainage from the project shall be protected by sediment
traps such as, but not necessarily limited to, secured hay bales, sod or stone, which
shall be maintained and modified as required by construction progress, and which shall
be approved by the City Engineer before installation. In no case shall sediment or
debris be allowed to enter a public right-of-way in such a manner as to create a traffic
hazard, a public nuisance or a threat to existing drainageways.
(f) Sediment Trapping Measures. Sediment basins and traps, perimeter berms,
filter fences, berms, sediment barriers, vegetative buffers and other measures
intended to trap sediment or prevent the transport of sediment onto adjacent
properties, or into storm sewer systems or existing water bodies, shall 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 Engineer 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.
(g) Sedimentation Basins. Areas of three (3) acres or more shall be required to
have temporary sedimentation basins as a positive remedy against downstream
siltation, which shall be shown and detailed on construction plans. During
development, permanent detention areas may be used in place of sedimentation basins,
provided they are maintained to the satisfaction of the City Engineer, The contractor
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.,I:;' r ? •?1'. ?? ' Imo. "n.. ? c? :'x+..?..>.: ,>.. I:; k?Y.. ..?.. _..J..e `. [:rtv
r?h7.u°si,?,??,NS?,i:l"+?T'?ki+?lJ'u?, SS:cI?.?W.B' -i3f..w:a'??.1;.w•' ".++i.:t:.try:-'n•ai?.:iL`•iN.?.'iaw.9j'x;:a •=`: ..., ,?:w:.;?:?.?T"--':?-_„-,?q.r7{?7M?stAS.ta:.r??:..Z #Tk+??Ekae
shall prohibit the discharge of silt through the outfall structure during construction of
any detention area and shall clean out the detention area before Installing nny
permanent subdrain pipe. In addition, permanent detention areas shall be totally
cleaned out and operating properly at the time of final Inspection and at the and of
any applicable 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 construction by regular removal of sediment from the basin.
(h) Working In or Crossing Waterways or Waterbodles. Land alteration and
construction shall be minimized In all waterways and in a 25-foot-wide strip .adjacent
to the water, measured from the top of the bank of the waterway. Construction
equipment and motor vehicles shall be kept out of waterways and the 25-foot buffer
area whenever possible. Barriers shall be used to prevent access by construction
equipment and motor vehicles. Where in-channel work cannot be avoided, precautions
shall be taken to stabilize the work area during land alteration, development and
construction to mimimize erosion. If the channel or buffer area is disturbed during
land alteration, it shall be stabilized within three (3) calendar days after the in-
channel work is completed. Silt curtains or other filter/siltation reduction devices
shall be installed on the downstream side of the in-channel activity to alleviate
increased turbidity. Wherever stream crossings are required, properly-sized temporary
,
culverts shall be provided and shall be removed when construction is completed. Upon
completion of construction, the area of the crossing shall be restored to a condition
reasonably equal to that which existed prior to the construction activity.
(i) Swales, Ditches and Channels. All disturbed or constructed swales, ditches
and channels leading from the site shall be sodded within three (3) days of excavation.
All interior swales • and detention areas shall be sodded prior to issuance of a
Certificate of Occupancy.
(j) Trench Excavation. The construction of underground facilities shall be
accomplished In an expeditious manner, with backfill and restoration lagging no more
than four hundred (400) feet behind excavation and installation. Where appropriate,
excavated material shall be cast onto the uphill side of any trench and shall not be
cast into any channel or channel bank.
(k) Maintenance. All erosion control devices shall be checked regularly, and
after each rainfall, and shall be cleaned or repaired as required.
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' Saction 2. This ordinance shall bo effective Immediately upon adoption.
PASSED ON FIRST READING April 17, 1986
PASSED AND ADOPTED ON
. SECOND AND FINAL READING
1986 0ay 15,
Attests
City ClerkU,
" Approved and to form
' and correctness:
f City Attorn y
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CI 9 .1 :'gyp a. t.
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RECEIVED
MAY '20 M6
CITY, CLERK
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