HomeMy WebLinkAbout1990-34 Storm Water ManagementPreparation of this Document was aided through financial assistance
received from the State of Florida under the Local Government Land
Development Regulation Assistance Program authorized by Chapter 89-
253, Laws of Florida, and administered by the Florida Department
of Community Affairs.
ORDIHANCE NO.34-90
AN ORDINANCE OF THE VILLAGE OF NORTH PALM BEACH, FLORIDA,
FOR STORM WATER MANAGEMENT THROUGHOUT ALL AREAS of THE VILLAGE,
INCLUDING NEW AND EXISTING AREAS THAT ARE REDEVELOPED/ PROVIDING
FOR THE REPEAL OF ALL ORDINANCES OR PARTS OF ORDINANCES IN CONFLICT
HEREWITH; AND PROVIDING FOR AN EFFECTIVE DATE.
BE IT ORDAINED BY THE VILLAGE COUNCIL OF NORTH PALM,
FLORIDA:
Dection 1. Storm water management, general, is hereby
created as follows:
1. Tho storm water management system shall be designed in
accordance with accepted engineering principles for design
floods resulting from rainfall and tidal elevations
experienced in the Intracoastal Waterway for storm frequencies
as follows:
(a) Minimum street grade shall exceed calculated flood levels
resulting from a ten-year frequency storm tide plus
rainfall runoff.
(c)
(b) The finished floor of all structures shall exceed the
ono hundred -year tidal flooding and rainfall runoff
level, but in no case shall be less than eight and five -
tenths (8.5) feet above mean sea level.
Storm drainage facilities, inoluding swales, inlets and
conduits shall be designed on runoff predicted from a
throe -year intensity rainfall ourve in general use for
this area.
(d) Roadside swales within street rights -of -way shall be
constructed in accordance with approved typioal sections
for the subdivision under consideration. Swale cross
sections shall be designed to carry runoff up to the edge
of pavement, or edge of improved property adjacent to the
right-of-way. Surplus water from the swales shall be
diverted into a closed storm drainage system or other
approved means. Placement of permitted trees in a swale
will be such that, as tree growth occurs, the design and
function of the Swale are not compromised.
Open channels and outfall ditches for the purpose of
conveying storm runoff within any subdivision development
will not be allowed. However, open channels conneoting
to tidewater for the purpose of navigational access to
existing or proposed waterways will be permitted provided
they are protected by concrete bulkheads and have a
minimum width of eighty (60) feet and a minimum center
line depth of eight and zero tenths (6.0) feet.
(f) In order to minimize the degradation of water quality in
receiving bodies, all development will be provided
with landscaped areas, grassed areas or other natural
vegetated areas to receive runoff from buildings,
pavement or other impervious areas to the degree that
pollutants from these areas may be absorbed by the
vegetation or percolated into the soil. No runoff from
(0)
1
such impervious areas shall be discharged directly into
any inlet or storm sewer without first being given the
opportunity to pass through a natural vegetated area.
Ali potential areas of soil erosion shall be protected
to minimize siltation transport by flowing water.
(g) The developer/owner of any site shall be responsible for
the on -site management of storm water runoff in a manner
such that post -development runoff rates, volumes and
pollutant loads do not exceed predevelopment conditions
as per Chapters 40E-4, 40E-40 and/or 40E-41, Florida
Administrative Code.
(h) The design of the storm water management system shall
provide for protection of natural drainage features and
promote the funotions of groundwater recharge areas.
(i) where storm water retention systems are'required, any
modification to, or construction of canals shall
incorporate water and habitat quality enhancement
features such as planted littoral zones or shallow
shelves, bank slopes conducive to shoreline vegetation
and immediate vegetative stabilization of any bare ground
adjacent to the system, as appropriate.
(j) To protect and preserve water quality, Best Management
Practices (BMPs) for construction site runoff, as
contained in Chapter 4.0 of the palm Beach Qounty Zee
Areawide Waste Treatment Management Platt, shall be
employed,
2. The requirements of Section 1.1, above, shall be in effect
throughout all areas of the Village and shall pertain to all
new and existing areas that are redeveloped.
Section 2. All ordinances or parts of ordinances in
conflict herewith are hereby repealed.
Section 3.. This ordinance shall take effect immediately
upon passage.
PLACED ON FIRST READING THIS 13th DAY OF September
PLACED ON SECOND, FINAL READING AND PASSED 'THIS 27tF
September , 1990.
MAYOR
(village Seal)
^ATTEST:
C�Ke-► w
Village Clerk
, 1990.
DAY OF
This Document was prepared by Craig A. Smith & Associates for the
Village of North Palm Beach, August 1990.
ordnpb.dge
9/21/90
2