Agenda Item 7EAGENDA ITEM # 7E
SEPTEMBER 26, 2011
CITY COMMISSION MEETING
STAFF REPORT
AGENDA ITEM: Adoption of Revisions to Chapter 8 Flood Hazard Areas
SUBMITTED BY: David Thompson, Assistant City Manager
Michael Griffin, CBO, CFM Interim Community Development
Director /Building Official
DATE: August 26, 2011
BACKGROUND: As recommended by the Federal Emergency
Management Agency (FEMA), attached is a strike- through and underlined
proposed ordinance with revisions to Chapter 8 Flood Hazard Areas of the
City of Atlantic Beach Code. The proposed ordinance contains the Federal
regulations governing our community participation in the National Flood
Insurance Program (NFIP) and local regulation of development in Special
Flood Hazard Areas (SFHA). The proposed ordinance is intended to assist
with our needs as related to floodplain management, land use and zoning. The
ordinance contains regulations for coastal communities with regulatory
floodways such as Atlantic Beach. The Community Rating System (CRS)
program allows discounts for flood insurance rates, for which Atlantic Beach
property owners receive a 15 percent discount.
Based on our participation in the CRS program via Chapter 44 Code of
Federal Regulations 60.3 Floodplain Management for flood -prone areas, staff
has already been required to enforce the proposed regulations. The formal
adoption of these provisions into City Code will not create additional
regulation for enforcement from what has already existed for floodplain
management.
The attached proposed ordinance has been reviewed by the State of Florida
Floodplain Management office and is recommended for adoption. The
Community Development Board heard this item August 16, 2011 and voted
unanimously to approve recommending to the City Commission for adoption.
BUDGET: No budget impact
RECOMMENDATION: Adopt Ordinance 25 -11 -42 amending Chapter 8 Flood Hazard Areas of the
City Code as recommended by the Federal Emergency Management Agency.
ATTACHMENT: STRIKE - THROUGH UNDERLINED PROPOSED ORDINANCE 25 -11 -42
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
ORDINANCE NO. 25 -11 -42
AN ORDINANCE OF THE CITY OF ATLANTIC BEACH, FLORIDA,
AMENDING CHAPTER 8 OF THE CODE OF ORDINANCES, FLOOD
HAZARD AREAS, RELATING TO FLOOD DAMAGE PREVENTION, IN
ORDER TO ADOPT, TO THE EXTENT APPLICABLE, THE
REGULATIONS AND POLICIES SET FORTH IN THE STATE OF
FLORIDA MODEL FLOOD DAMAGE PREVENTION ORDINANCE;
PROVIDING FOR STATUTORY AUTHORIZATION, FINDINGS OF
FACT, PURPOSE, AND OBJECTIVES; PROVIDING FOR DEFINITIONS;
PROVIDING FOR GENERAL PROVISIONS; PROVIDING FOR
ADMINISTRATION; PROVIDING FOR PROVISIONS FOR FLOOD
HAZARD REDUCTION; PROVIDING FOR VARIANCE PROCEDURES;
PROVIDING FOR CONFLICT AND SEVERABILITY; PROVIDING FOR
INCLUSION INTO THE CODE OF LAWS AND ORDINANCES; AND
PROVIDING FOR AN EFFECTIVE DATE.
WHEREAS, the Atlantic Beach City Commission seeks to protect the health, safety and
welfare of the citizens of Atlantic Beach; and
WHEREAS, the Commission desires to amend, to the extent applicable, the City of
Atlantic Beach's current Chapter 8, Flood Hazard Areas, of the Code of Ordinances by adopting
regulations and policies set forth in the State of Florida Model Flood Damage Prevention
Ordinance.
NOW THEREFORE, BE IT ENACTED BY THE CITY COMMISSION ON
BEHALF OF THE PEOPLE OF THE CITY OF ATLANTIC BEACH, FLORIDA:
SECTION 1. Chapter 8 of the Code of Ordinances of the City of Atlantic Beach, Florida,
Flood Hazard Areas, is hereby amended to read as follows:
"Article I. STATUTORY AUTHORIZATION, FINDINGS OF FACT,
PURPOSE AND OBJECTIVES
"Sec. 8 -1. Statutory authorization.
The Legislature of the State of Florida has delegated in Chapter 166, Florida
Statutes the responsibility of local governmental units to adopt regulations, designed
to promote the public health, safety, and general welfare of its citizenry. Therefore,
the City Commission of Atlantic Beach, Florida, does ordain as follows in this
chapter.
Sec. 8 -2. Findings of fact.
(a) The flood hazard areas of the City of Atlantic Beach are subject to periodic
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
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.
(b) 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.
Sec. 8-3. Purpose.
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 flood waters;
(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 will unnaturally divert
flood waters or which may increase flood hazards to other lands.
Sec. 8 -4. Objectives.
The objectives of this ordinance are to:
(1) Protect human life and health;
(2) Minimize expenditure of public money for costly flood control projects;
(3) Minimize the need for rescue and relief efforts associated with flooding and
generally undertaken at the expense of the general public;
(4) Minimize prolonged business interruptions;
(5) Minimize damage to public facilities and utilities such as water and gas mains,
electric, telephone and sewer lines, streets and bridges located in floodplains;
(6) Help maintain a stable tax base by providing for the sound use and development
of flood -prone areas in such a manner as to minimize flood blight areas; and
(7) Ensure that potential home buyers are notified that property is in a flood hazard
area.
Sec. 8 -5. Definitions.
Unless specifically defined below, words or phrases used in this chapter shall be
interpreted so as to give them the meaning they have in common usage and to give this chapter
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
its most reasonable application:
Accessory structure (Appurtenant structure) means a structure that is located on the
same parcel of property as the principal structure and the use of which is incidental to the use of
the principal structure Accessory structures should constitute a minimal investment, may not be
used for human habitation and be designed to have minimal flood damage potential. Examples
of accessory structures are detached garages carports storage sheds pole barns, and hay
sheds.
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 load- bearing wall other
than a fire wall. Any walled and roofed addition which is connected by a fire wall or is separated
by independent perimeter load- bearing walls is new construction.
Appeal means a request for a review of the planning and development direGtGr's
Floodplain Administrator's interpretation of any provision of this chapter or a request for a
variance.
Area of shallow flooding means a designated AO or V- --AH Zone on a community's flood
insurance rate map (FIRM) with base flood depths from one to three (3) 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. Such flooding is characterized by ponding or sheet
flow.
Area of special flood hazard is the land in the floodplain within a community subject to a
one percent or greater chance of flooding in any given year. The term is synonymous with
"special flood hazard area ".
Base flood means the flood having a one percent chance of being equaled or exceeded
in any given year.
Base Flood Elevation means the water - surface elevation associated with the base flood.
Basement means that portion of a building having its floor subgrade (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.
Building —see Structure
any eGGUpanGy or steFage.
Coastal high hazard area means the area subject to high velocity waters caused by, but
not limited to, hurricane wave wash. The area is designated on a FIRM as Zones VI -- 30, VE or
V.
Development means any manmade change to improved or unimproved real estate,
including, but not limited to, buildings or other structures, mining, dredging, filling, grading,
paving, excavating, drilling operations, or permanent storage of materials.
Elevated building means a non - basement building built to have the lowest floor elevated
above the ground level by means of fill, solid foundation perimeter walls, pilings, columns (posts
and piers), shear walls, or breakaway walls.
Encroachment means the advance or infringement of uses plant growth, fill, excavation,
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
buildings permanent structures or development into a floodplain which may impede or alter the
flow capacity of a floodplain.
Existing Construction means for the purpose of floodplain management, structures for
which the "start of construction" commenced before March 23, 1987.
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 home 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) is
completed before March 23, 19870
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 or flooding means;
(a) Aa general and temporary condition of partial or complete inundation of normally dry
land areas from:
(1) The overflow of inland or tidal waters;
(2) The unusual and rapid accumulation or runoff of surface waters from any source.
The collapse or subsidence of land along a shore of a lake or other body of water
as the result of erosion or undermining caused by waves or currents of water
exceeding anticipated cyclical levels or suddenly caused by an unusually high
water level in a natural body of water, accompanied by a severe storm or by an
unanticipated force of nature such as flash flood or an abnormal tidal surge or by
some similarly unusual and unforeseeable event which results in flooding as
defined in paragraph (a) (1) of this definition.
Flood Boundary and Floodwav Ma (FBFM) means the official map of the
communitv on which the Federal Em ergency Management Agency (FEMA) has
delineated the areas of special flood hazard and regulatory floodways.
Flood hazard boundary map (FHBM) means an official map of a community, issued by
FEMA the Fede Gm°rrv°nnv MaR ge m°nt A genGy, where the boundaries of the areas of
special flood hazard have been defined as Zone A.
Flood insurance rate map (FIRM) means an official map of a community, on
which FEMA the Feder Emergency ManageFnen+ Agen has delineated both the
areas of special flood hazard and the risk premium zones applicable to the community.
Flood insurance study is means the official hydrology and hydraulics report provided by
FEMAt,"-re— Fzd °pra:— ErnGrgenG Manny This report contains an examination,
evaluation and determination of flood prof hazards and if appropriate, corresponding water
surface elevations or an examination evaluation, and determination of mudslide as well as
other -flood related erosion hazards The study may also contain flood profiles, as well as the
flood insurance rate map, the flood boundary - floodway map (where applicable) and other
related data and information
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
Floodplain means any land area susceptible to being inundated by water from any
source (see definition of "flooding ".
Floodplain management means the operation of an overall program of corrective and
preventive measures for reducing flood damage and preserving and enhancing where possible,
natural resources in the floodplain including but not limited to emergency preparedness plans,
flood control works floodplain management regulations and open space plans.
Floodplain Administrator is the individual appointed to administer and enforce the
floodplain regulations of the City of Atlantic Beach.
Floodplain management regulations means this ordinance and other zoning ordinances,
subdivision regulations building codes health regulations special purpose ordinances (such as
floodplain ordinance grading ordinance and erosion control ordinance and other applications
of police power which control development in flood -prone areas. This term describes Federal,
State of Florida or local regulations in any combination thereof, which provide standards for
preventing and reduction flood loss and damage.
Floodproofing means any combination of structural and non - structural additions,
changes or adiustments to structures which reduce or eliminate flood damage to real estate or
improved real property water and sanitary facilities structures and their contents.
Floodway means the channel of a river or other watercourse and the adjacent land areas
that must be reserved in order to discharge the base flood without cumulatively increasing the
water surface elevation more than one foot.
Floodway fringe means that area of the one - percent (base or 100 -year) floodplain on
either side of the regulatory floodway.
Poor- means the top surfaGe of an eRGIE)sed area "R a building ("Rduding baserneRt),
tep of slab in GonGrete slab GenstruGtien or top of weed fleering in weed fFarne Genst.___...
term dees not 'nGlude the fleer of a garage used solely fer parkiRg vehi
Freeboard is a faGtE)F of safety usually expressed 1 R feet above the base fleed elevation
(13FE). in the City of AtlantiG BeaGh, freebeard is two and one-half (2.5) . Means the
additional height usually expressed as a factor of safety in feet above a flood level for
purposes of floodplain management Freeboard tends to compensate for many unknown
factors such as wave action blockage of bridge or culvert openings and hydrological effect of
urbanization of the watershed which could contribute to flood heights greater than the heights
calculation for a selected frequency flood a floodway conditions. Freeboard for the City of
Atlantic Beach is two and one half (2.5) feet above the 100 year base flood elevation.
Free of Obstruction means any type of lower area enclosure or other construction
element will not obstruct the flow of velocity water and wave action beneath the lowest
horizontal structural member of the lowest floor of an elevated building during a base flood
event This requirement applies to the structures in velocity zones (V- Zones).
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 a docking or port
facility necessary for the loading and unloading of cargo or passengers, shipbuilding, ship
repair, or seafood processing facilities. The term does not include long -term storage,
manufacture, sales, or service facilities.
Hardship as related to variances for this ordinance means the exceptional difficulty
associated with the land that would result for a failure to grant the requested variance. The
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
community requires that the variance is exceptional unusual and peculiar to the property
involved Mere economic or financial hardship alone is not exceptional. Inconvenience,
aesthetic considerations physical handicaps personal preferences or the disapproval of one's
neighbors likewise cannot as a rule qualify as an exceptional hardship; all of these problems
can be resolved through other means without granting a variance even if the alternative is more
expensive or requires the property owner to building elsewhere or put the parcel to a different
use than originally intended.
Historic Structure means any structure that is:
(1) Listed individually in the National Register of Historic Places (a listing maintained by
the Department of Interior) or preliminarily determined by the Secretary of the Interior as
meeting the requirements for individual listing on the National Register:
(2) Certified or preliminarily determined by the Secretary of the Interior as contributing to
the historical significance of a register district or a district preliminarily determined by the
Secretary to qualify as a registered historic district:
(3) Individually listed on the Florida inventory of historic places, which has been
approved by the Secretary of the Interior, or
(4) Individually listed on a local inventory of historic places in communities with historic
preservation programs that have been certified either:
(a) By the Florida program as determined by the Secretary of the Interior, or
(b) Directly by the Secretary of Interior.
Highest adjacent grade means the highest natural elevation of the ground surface, prior
to construction, next to the proposed walls of a structure.
Lowest adiacent grade means the lowest elevation after completion of construction, of
the ground sidewalk patio deck support or basement entryway immediately next to the
structure.
Lowest floor means the lowest floor of the area's lowest enclosed area (including
basement) of a building. An unfinished or flood resistant enclosure, used solely for parking of
vehicles, building access, or storage in an area other than a basement, is not considered a
buildings lowest floor, provided that such enclosure is not built so as to render the structure in
violation of the nonelevation design standards of this chapter. Structures mean a walled and
roofed building that is principally above ground, a manufactured home, or a gas or liquid storage
tank.
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).
Mean sea level means the average height of the sea for all stages of the tide. It is used
as a reference for establishing various elevations within the floodplain. For purposes of this
chapter the term is synonymous with national geodetic vertical datum (NGVD).
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 also includes park trailers, travel trailers, and
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
similar transportable structures placed on a site for one hundred eighty (180) consecutive days
or longer and intended to be improved property.
Manufactured home park or subdivision means a parcel (or contiguous parcels) of land
divided into two or more manufactured home lots for rent or sale.
Market value means the building value which is the property value excluding the land
value and that of the detached accessory structure and other improvements on site (as agreed
to be between a willing buyer and seller) as established by what the local real estate market will
bear. Market value can be established by an independent certified appraisal (other than a
limited or curbside appraisal or one based on income approach), Actual Cash Value
(replacement cost depreciated for age and quality of construction of building) or adjusted tax -
assessed values.
Mean Sea Level means the average height of the sea for all stages of the tide. It is used
as a reference for establishing various elevations within the floodplain. For purposes of this
ordinance the term is synonymous with National Geodetic Vertical Datum (NGVD) of 1929, or
North American Vertical Datum (NA VD) of 1988.
National geodetic vertical datum (NGVD), as corrected in 1929, is a vertical control used
as a reference for establishing varying elevations within the floodplain.
New construction means structures for which the "start of construction" commenced on
or after the effestive —date of this nhapter March 23, 1987 The term also includes any
subsequent improvements to such structures.
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 home are to be affixed (including at a minimum the installation of utilities,
the construction of streets and either final side grading or the pouring of concrete pads)
is completed on or after March 23, 1987.
North American Vertical Datum (NAVD) of 1988 means a vertical control used as a
reference for establishing varying elevations within the floodplain.
Primary frontal dune means a continuous of nearly continuous mound or ridge of sand
with relatively steep seaward and landward slopes immediately landward and adjacent to the
beach and subiect to erosion and overtopping from high tides and waves during maior coastal
storms The inland limit of the primary frontal dune occurs at the point where there is a distinct
change from a relatively steep slope to a relatively mild slope.
Principally above ground means that at least 51 percent of the actual cash value of the
structure is above ground.
Program deficiency means a defect in the community's floodplain management
regulations or administrative procedures that impairs effective implementation of those
floodplain management regulations or of the standards required by the National Flood Insurance
Program.
Public safety and nuisance means anythinq which is injurious to safety or health of the
entire community or a neighborhood or any considerable number of persons, or unlawfully
obstructs the free passage or use in the customary manner, of any navigable lake or river, bay,
stream, canal, or basin.
Reasonably safe from flooding means base flood waters will not inundate the land or
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
damage structures to be removed from the SFHA and that any subsurface waters related to the
base flood will not damage existing or proposed building.
Recreational vehicle means a vehicle that is:
(1) built on a single chassis;
(2) 400 square feet or less when measured at the largest horizontal proiection;
(3) Designed to be self - propelled or permanently towable by a light duty truck;
and
(4) Designed primarily not for use as a permanent dwelling but as temporary
living quarters for recreational camping travel, or seasonal use.
Regulatory floodway means the channel of a river or other watercourse and the adjacent
land areas that must be reserved in order to discharge the base flood without cumulatively
increasing the water surface elevation more than a designated height.
Remedy a deficiency or violation means to bring the regulation, procedure, structure or
other development into compliance with State of Florida Federal, or local floodplain
management regulations; or if this is not possible to reduce the impacts of its noncompliance.
Ways the impacts may be reduced include protecting the structure or other affected
development from flood damages implementing the enforcement provisions of this ordinance or
otherwise deterring future similar violations or reducing Federal financial exposure with regard
to the structure or other development.
Repetitive loss means flood related damage sustained by a structure on two separate
occasions during a 10 -year period for which the cost of repairs at the time of each such flood
event on the average equals or exceeds 25 percent of the market value of the structure before
the damage occurred.
Riverine means relating to formed by or resembling a river (including tributaries)
stream, brook, ect.
Sand dunes mean naturally occurring accumulations of sand in ridges or mounds
landward of the beach.
Shallow flooding — see area of shallow flooding.
Special flood hazard area — see area of special flood hazard.
Start of construction, for other than new construction or substantial improvements under
the Coastal Barrier Resources Art (P.L. 97 -348), includes substantial improvement, and means
the date the building permit was issued, provided the actual start of construction, repair,
reconstruction, or improvement was within one hundred eighty (180) days of the permit date.
The actual start means the first placement of permanent construction of a structure (including a
manufactured home) 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; nor does it include the installation of streets and /or
walkways; nor does it include excavation for a basement, footings, piers or foundations or the
erection of temporary forms; nor does it include 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.
Structures means for floodplain management purposes, a walled and roofed building
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
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 it's before damage condition would equal or exceed 50 percent
of the market value of the structure before the damage occurred. This term also includes
"repetitive loss" structure as defined herein.
Substantial improvement means any repair, reconstruction, alteration, or improvement to
a structure, the cost of which equals or exceeds fifty (50) percent of the market value of the
structure, either (1) before the improvement or repair is started, or (2) if the structure has been
damaged and is being restored, before the damage occurred. For the purposes of this definition,
"substantial improvement" is considered to occur 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 does not, however, include any project for
improvement of a structure required to comply with existing health, sanitary, or safety code
specifications which are solely necessary to assure safe living conditions. This term does not
include any alteration of a historic structure provided that the alteration will not preclude the
structure's continued designation as a historic structure.
Substantial improved existing manufactured home parks or subdivision is where the
repair, reconstruction rehabilitation or improvement of the streets utilities and pads equals or
exceeds 50 percent of the value of the streets utilities and pads before the repair,
reconstruction or improvement commenced.
Variance is 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 hardship.
Violation means the failure of a structure or other development to be fully compliant with
the requirements of this ordinance A structure of other development without the elevation
certificate other certifications or other evidence of compliance required in this ordinance is
presumed to be in violation until such time so as that documentation is provided.
Watercourse means a lake river, creek stream wash channel or other topographical
feature on or over which waters flow at least periodically. Watercourse includes specifically
designated areas in which substantial flood damage may occur.
Water surface elevation means the height in relation to the National Geodetic Vertical
Datum (NGVD) of 1929 or the North American Vertical Datum (NAVD) of 1988, of floods of
various magnitudes and frequencies in the floodplains of coastal or riverine areas.
Sec. 8-6. Lands to which this chapter applies.
This chapter shall apply to all areas of special flood hazard within the jurisdiction of
Atlantic Beach, Florida.
Sec. 8-7. Basis for establishing the areas of special flood hazard.
The areas of special flood hazard identified by the Federal Emergency Management
Agency in its most recently published Flood Insurance Study /Flood Insurance Rate Map, dated
April 17, 1989, with accompanying maps and other supporting data, and any revision thereto,
are adopted by reference and declared to be a part of this chapter.
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AGENDA ITEM # 7E
SEPTEMBER 26, 20I 1
(2) Require copies of additional Federal State of Florida or local permits, especially
as they relate to Chapters 161.052; 320.8249; 320; 320.8359; 373.036; 380.05;
381,0065; and 553 Part IV Florida Statutes be submitted along with the
development permit application and maintain such permits on file with the
development per
known may be required, and if speG federal er state permit FequiFernents are
that GGpies ef SUGh permits be provided and maintained en file with the
(3) Notify adjacent communities and the Florida Department of Community Affairs --
Division of Emergency Management — State Floodplain Management Office, St.
Johns River Water Management District, prior to any alteration or relocation of a
watercourse, and submit evidence of such notification to the Federal Emergency
Management Agency.
(4) Notify FEMA within six months when new technical or scientific data becomes
available to the community concerning physical changes affecting flooding
conditions so that risk premium rates and flood plain management requirements
will be based on current data.
(5) Assure that maintenance is provided within the altered or relocated portion of
said watercourse so that the flood- carrying capacity is not diminished.
(6) Verify and record the actual elevation (in relation to mean sea level) of the lowest
floor (A- Zones) or bottom of the lowest horizontal structure member of the lowest
floor (V- Zones) of all new and substantially improved buildings, in accordance
with section 8 -32; JO WhiGh the new or substantially improved StFUGtUres have
(7) Verify and record the actual elevation (in relation to mean sea level) to which the
new and substantially improved buildings have been flood - proofed, in
accordance with section 8 -32.
(8) Review certified plans and specifications for compliance. When flood - proofing is
utilized for a particular building certification shall be obtained from a registered
engineer or architect certifying that all areas of the building, together with
attendant utilities and sanitary facilities below the required elevation are water
tight 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 in compliance with this Chapter.
In Coastal High Hazard Areas certification shall be obtained from a registered
professional engineer or architect that the building is designed and securely
anchored to pilings or columns in order to withstand velocity waters and
hurricane wave wash Additionally in Coastal High Hazard Areas, if the area
below the lowest horizontal structural member of the lowest floor is enclosed, it
may be done so with open wood lattice and insect screening or with non -
supporting breakaway walls that meet the standards of section 8 -32 (b) of this
ordinance;
SeGUrely aRGhered to adequately aRGhered pilings OF GOIUM116 in order to
withstand ve!GG*ty waters and hUFFOGane wave wash.
( IR Goastal hazard apeas, the lGGal fleGdplain administrator shall review plaRs fE)r
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
(10) Where Base Flood Data is utilized obtain and
maintain records of the lowest floor and floodproofing elevations for new
construction and substantial improvement in accordance with section 8 -32
(a) and (b) respectively.
(11) Interpret Where ;n +ornro +., +c.,Y, ,S needed as + 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) the local
floodplain administrator shall make the necessary interpretation. The person
contesting the location of the boundary shall be given a reasonable opportunity to
appeal the interpretation as provided in this article.
(12) When base flood elevation data or floodway data have not been provided in
accordance with section 8 -7, then the local floodplain administrator shall obtain,
review and reasonably utilize any base flood elevation and floodway data
available from a federal, state or other source, in order to administer the
provisions of article III.
(13) All records pertaining to the provisions of this chapter shall be maintained in the
office of the local floodplain administrator shall be open for public inspection and ..
Coordinate all change requests to the FIS FIRM and FBFM with the requester,
State of Florida and FEMA.
Sec. 8 -23. Development permit -- Established.
A development permit shall be required in conformance with the provisions of this
chapter prior to the commencement of any development activities.
Sec. 8 -24. Same -- Application procedure.
Application for a development permit shall be made to the
dir-estor Floodplain Administrator on forms furnished by him or her prior to any development
activities, and may include, but not be limited to, the following plans in duplicate drawn to scale
showing the nature, location, dimensions, and elevations of the area in question; 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 in relation to mean sea level of the proposed lowest floor (including
basement) of all StFUGtures buildings
(2) Elevation in relation to mean sea level to which any nonresidential structure will
be floodproofed;
(3) Certificate from a registered professional engineer or architect that the
nonresidential floodproofed structure will meet the floodproofing criteria in section
8- 32(b);
(4) Description of the extent to which any watercourse will be altered or relocated as
a result of proposed development; and
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
Elevation in relation to mean sea level of the bottom of the lowest horizontal
structural member of the lowest floor and provide a certification form a registered
engineer or architect indicating that they have developed and /or reviewed the
structural designs specifications and plans of the construction and certified they
are in accordance with accepted standards of practice in Coastal High Hazard
Areas.
(b) Construction stage.
members f the lo west fteeF. 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 Floodplain Administrator a certification
of the NGVD or NAVD 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. Said certification shall be
prepared by or under the direct supervision of a registered land surveyor or professional
engineer and certified by same. When floodproofing is utilized for a particular building,
said certification shall be prepared by or under the direct supervision of a professional
engineer or architect and certified by same. Any work undertaken prior to submission of
the certification shall be at the permit holder's risk. The planning and developm
tsr Floodplain Administrator shall review the 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 survey or failure to make said corrections required hereby, shall be cause to
issue a stop -work order for the project.
Sec. 8 -25. Variance procedures.
(a) The board of adjustment as established by the Gity City Commission shall hear and
decide appeals and requests for variances from the requirements of this chapter.
(b) The City Commission shall hear and decide appeals when it is
alleged there is an error in any requirement, decision, or determination made by the
Floodplain Administrator in the enforcement or
administration of this chapter.
(c) Any person aggrieved by the decision of the City Commission or
any taxpayer may appeal such decision to the Circuit Court of the State of Florida.
(d) Variances may be issued for the reconstruction, rehabilitation or restoration of structures
listed on the National Register of Historic Places or the State Inventory of Historic Places
without regard to the procedures set forth in the remainder of this section, except for
section 8- 25(h)(1) and (4), and provided the proposed reconstruction, rehabilitation, or
restoration will not result in the structure losing its historical designation.
(e) In passing upon such applications, the board of appeals shall consider all technical
evaluations, all relevant factors, all standards specified in other sections of this chapter,
and:
(1) The danger that materials may be swept onto other lands to the injury of others;
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
(2) The danger of life and property due to flooding or erosion damage;
(3) The susceptibility of the proposed facility and its contents to flood damage and
the effect of such damage on the individual owner;
(4) The importance of the services provided by the proposed facility to the
community;
(5) The necessity of the facility to a waterfront location, in the case of a functionally
dependent facility;
(6) The availability of alternative locations, not subject to flooding or erosion
damage, for the proposed use;
(7) The compatibility of the proposed use with existing and anticipated development;
(8) The relationship of the proposed use to the comprehensive plan and floodplain
management program for that area;
(9) The safety of access to the property in times of flood for ordinary and emergency
vehicles;
(10) The expected heights, velocity, duration, rate of rise and sediment transport of
the flood waters and the effects of wave action, if applicable, expected at the site;
and
(11) 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.
(f) Upon consideration of the factors listed above, and the purposes of this chapter, the
City Commission —may attach such conditions to the granting of
variances as it deems necessary to further the purposes of this chapter.
(g) Variances shall not be issued within any designated floodway if any increase in flood
levels during the base flood discharge would result.
(h) Conditions for variances:
(1) Variances shall only by 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, a determination that the variance is the minimum
necessary so as not to destroy the historic character and design of the building.
(2) Variances shall only be issued upon (i) a showing of good and sufficient cause,
(ii) a determination that failure to grant the variance would result in exceptional
hardship; and (iii) a determination that the granting of a variance will not result in
increased flood heights, additional threats to public safety, extraordinary public
expense, create nuisance, cause fraud on or victimization of the public, or conflict
with existing local laws or ordinances.
(3) 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.
(4) The Floodplain Administrator shall maintain
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AGENDA ITEM # 7E
SEPTEMBER 26, 2011
(i) 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.
Any alteration repair, reconstruction or improvements to a building that is not in
compliance with the provisions of the ordinance shall be undertaken only if said
nonconformity is not furthered extended, or replaced;
All applicable additional Federal State of Florida and local permits shall be obtained
and submitted to the Floodplain Administrator along with the application for development
permit Copies of such shall be maintained on file with the development permit. State of
Florida permits may include but not be limited to, the following:
(1) St Johns River Water Management District: in accordance with Chapter 373.036
Florida Statutes Section (2) (a) — Flood Protection and Floodplain Management;
(2) Department of Community Affairs: in accordance with Chapter 380.05 F.S. Areas of
Critical State Concern and Chapter 553 Part IV F.S. Florida Building Code;
(3) Department of Health: in accordance with Chapter 381.0065 F.S. Onsite Site
Sewage Treatment and Disposal Systems; and
(4) Department of Environmental Protection Coastal Construction Control Line: in
accordance with Chapter 161.053 F.S. Coastal Construction and Excavation;
(1) Standards for Subdivision Proposals and other new Proposed Development (including
Manufactured homes):
(1) Such proposals shall be consistent with the need to minimize flood damage;
(2) Such shall have public utilities and facilities such as sewer, gas electrical, and water
systems located and constructed to minimize or eliminate flood damage; and
(3) Such proposals shall have adequate drainage provided to reduce exposure to flood
hazards.
(m) When proposed new construction and substantial improvements are partially located in
an area of special flood hazard the entire structure shall meet the standards for new
construction.
(n) When proposed new construction and substantial improvements are located in multiple
flood hazard risk zones or in a flood hazard risk zone with multiple base flood elevation,
the entire structure shall meet the standards for the most hazardous flood hazard risk
zone and the highest base flood elevation.
Sec. 8 -32. Specific standards.
In all A -Zone areas of special flood hazard where base flood elevation data have been
provided (Zones AE, AI - 30, A (with base flood elevations) and AH) as set forth in section 8 -7 er
seG tiOn 8 23(k) the following provisions are required in addition to those set forth in Section 8-
31:
(a) Residential construction. New construction or substantial improvement of any residential
StFUGtUreresidential structure (including manufactured home) shall have the lowest floor,
including basement, elevated no lower than the two and one half feet (2.5') above base
flood elevation. Should solid foundation perimeter walls be used to elevate a structure,
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
openings sufficient to facilitate the unimpeded movements of flood waters shall be
provided in accordance with standards of section 8- 32(c).
(b) Nonresidential construction. New construction or substantial improvement of any
commercial, industrial, or nonresidential structure shall have the lowest floor, including
basement, elevated no lower than the level of the base flood elevation. Structures
located in all A Zones may be floodproofed in lieu of being elevated provided that all
areas of the structure below the required elevation are water tight with walls substantially
impermeable to the passage of water, and use structural components having the
capability of resisting hydrostatic and hydrodynamic loads and the effect of buoyancy. A
registered professional engineer or architect shall certify that the standards of this
subsection are satisfied. Such certification shall be provided to the affiGial as set forth in
seG t i en 8-2 along with the corresponding engineering data and the operational and
maintenance plans shall be provided to the Floodplain Administrator
(c) Enclosures below the Lowest Floo[Qev ted "v#d#W New construction or substantial
improvements that include fully enclosed areas formed by
foundation and other exterior walls below the lowest floor base fleed elevatioR shall be
designed to preclude finished living space and designed to allow for entry and exit of
floodwaters to automatically equalize hydrostatic flood forces on exterior walls.
(1) Designs for complying with this requirement must either be certified by a
professional engineer or architect or meet the following minimum criteria:
(2a) Provide a minimum of two (2) openings on different sides of each enclosed area
having a total net area of not less than one square inch for every square foot of
enclosed area subject to flooding;
(3b) The bottom of all openings shall be no higher than one foot above adjacent
interior grade (which must be equal to or higher in elevation than the adjacent
exterior grade) and
(4s) Openings may be equipped with screens, louvers, valves or other coverings or
devices provided they permit the automatic flow of floodwaters in both directions.
(54) Electrical, plumbing, and other utility connections are prohibited below the base
flood elevation.
(62) Access to the enclosed area shall be the minimum necessary to allow for parking
of vehicles (garage door) or limited storage of maintenance equipment used in
connection with the premises (standard exterior door) or entry to the living area
(stairway or elevator).
(73) The interior portion of such enclosed area shall not be partitioned or finished into
separate rooms.
(d) Standards for Manufactured Homes and Recreational Vehicles
All manufactured homes that are placed or substantially improved within Zon
Al 30 AH and AE on sites outside of an existing manufactured home park or
subdivision in a new manufactured home park or subdivision in an expansio to
an existing manufactured home park or subdivision or in an exist
manufactured home park or subdivision on which a manufactured home has
incurred "substantial damage" as the result of a flood the lowest floor be
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
elevated on a permanent foundation to no lower than two and one half (2.5) feet
above the base flood elevation and be securely anchored to an adequately
anchored foundation system to resist floatation collapse and lateral movement.
All manufactured homes to be placed or substantially improved in an existing
manufactured home park or subdivision that are not subject to these provision of
paragraph 4 (a) of this Section must be elevated so that either:
(a) The lowest floor of the manufactured home is elevated to no lower
than two and one -half feet above the base flood elevation, or
(b) The manufactured home chassis is supported by reinforced piers or
their foundation elements of at least an equivalent strength that are no
less than 66 inches in height above the grade and securely anchored to
an adequately anchored foundation system to resist flotation, collapse,
and lateral movement.
All recreational vehicles must be either:
(a) Be on the site for fewer than 180 days,
(b) Be fully licensed and ready for highway use (a recreational vehicle is
ready for highway use if it is on its wheels or lacking s system, is
attached to the site only by quick disconnect type utilities and security
devices and has not permanently attached additions), or
(c) Meet all the requirements for new construction including anchoring
and elevation standards in accordance with Section 8 -32.
e4 Adequate drainage paths around structures shall be provided on slopes to guide water
away from structures with Zone AH.
Standards for waterways with established Base Flood Elevations but without Regulatory
Floodways.
Located within the areas of special flood hazard established in Section 8 -7 of this
ordinance where streams exist for which base flood elevation data has been provided by
the Federal Emergency Management Agency without the delineation of the regulatory
floodway (A Zones AE and Al -30) the following provisions in addition to those set forth in
Section 8 -32 (a) through (e), shall apply:
(1) Until a regulatory floodway is designated no new construction, substantial
improvements or other development including fill shall be permitted within the
areas of special flood hazard unless it is demonstrated that the cumulative effect
of the proposed development when combined with all other existing and
anticipated development will not increase the water surface elevation of the base
flood more than one foot at any point in the community.
(2) Development activities which increase the water surface elevation of the base
flood by more than one foot may be allowed provided that the developer or
applicant first applies — with the community's endorsement- for a conditional
FIRM revision and receives the approval of the Federal Emergency
Management Agency (FEMA).
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
Standards for waterways with establ Base Flood Elevations and Floodways.
Located within the areas of special flood hazard established in Section 8 -7 of this
ordinance are areas designated as floodways. Since the floodway is an
extremely hazardous area due to the high velocity of flood waters which carry
debris potential projectiles and have significant erosion potential, the following
provisions in addition to those set forth in Section 8 -32 (a) through (e)e# —th+s
ofd# tee, shall apply:
(1) Prohibit encroachments including fill new construction substantial
improvements and other developments within the regulatory floodway unless
certification (with supporting technical data) by a registered professional
engineer is provided through hydrological and hydraulic analyses performed in
accordance with standard engineering practice demonstrating the
encroachments would not result in anV increase in flood level during occurrence
of the base flood discharge.
(2) Development activities including new construction and substantial
improvements within the requlatorV floodway that increase the base flood
elevation may be allowed provided that the developer or applicant first applies —
with the community's endorsement- for a conditional FIRM revision, and receives
the approval from FEMA.
(3) When fill is proposed in accordance with the permit issued by the Florida
Department of Health within the requlatorV floodway the development shall be
issued only upon demonstration bV appropriate engineering analyses that the
proposed fill will not increase the water surface elevation of the base flood in
accordance with Section 8 -32 (g)(1).
(h) For all structures located seaward of the Coastal Construction Control Line (CCCL), the
lowest floor of all new construction and substantial improvement shall be elevated to no
lower than the 100 -year flood elevation established by the Florida Department of
Environmental Protection or by FEMA in accordance with section 8 -7, whichever is
higher. All non - elevation design requirements of Section 8 -32 shall apply.
(e) Coastal high hazard areas (V Zones). Located within the areas of special
flood hazard established in section 8 -7 are areas designated as coastal
high hazard areas designated as Zones V1 -30 VE, or V (with BFE)
Thes d with wa wash
tFiCa�- Ctrca-Jr�r wa ,
therefore The following provisions shall apply:
(1) Meet the standards of Section 8 -24 -add- Section 8 -31 and Section 8 -32 (except
(2) All buildings or structures shall be elevated so that the bottom of the lowest
supporting horizontal member (excluding piles or columns) is located no lower
than the two and one -half feet above the base flood elevation level, whether or
not the structure contains a basement. with all spaGe below the lowest supporting
member open so as not te impede the flow of wateF. Open lattiGe woFk GF
deGOrative sGreeRing may be permitted for aesthetiG purposes only and must
designed to wash away in the event of abnormal wave aGtiC)R in aGGOrdanGe with
oGtion 8 32 (e) (8)
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
(3) All new construction b u il dings OF S Fes and substantial improvements
in Zones V1 -30, VE, and V (with BFE) shall be securely anchored on
pilings or columns.
(4) The AR pilings apA or columns foundation 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 (one
percent annual chance flood). Wind loading values will be those required by the
applicable State of Florida or local if more stringent than those of the State of
Florida, building standards.
5) For all buildinas located seaward of the C oastal Construction Control Line (CCCL
the bottom of the lowest horizontal structural member of the lowest floor of all new
construction and substantial improvements shall be elevated to the 100 -year flood
elevation established by the Florida Department of Environmental protection or the base
flood elevation plus two and one -half feet whichever is the higher. All non - elevation
design requirements of this section shall apply.
(6) A registered professional engineer or architect shall se#+€y develop or review that
the structural design, specifications and plans for the construction and shall
certify that the desiqn and methods of construction to be used are in see
accordance with accepted standards of practice for meeting with the provisions
contained in seGfion Q 32(()(2) (3) and (4` .,f this Ghaptef
M The elevation (in relationship to mean sea level) must be obtained of the bottom
of the lowest horizontal structural member of the lowest floor (excluding pilings
and columns) of all new and substantially improved structures. The Floodplain
Administrator shall maintain a record of all such information.
All new construction and substantial improvements shall be located landward of
the reach of the mean high tide.
(9) There shall be no fill used as structural support. Noncompacted fill may be used
around the perimeter of a building for landscaping /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 Floodplain Administrator -plannoRg and development direGto
shall approve design plans for landscaping /aesthetic fill only after the applicant
has provided an analysis by an engineer, architect, and /or soil scientist, which
demonstrates that the following factors have been fully considered:
a. Particle composition of fill material does not have a tendency for
excessive natural compaction;
b. Volume and distribution of fill will not cause wave deflection to adjacent
properties; and
C. Slope of fill will not cause wave run -up or ramping.
(10) When fill is proposed in accordance with the permit issued by the Florida
Department of Health in costal high hazard areas the development permit shall
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
be issued only upon demonstration by appropriate engineering analyses that the
proposed fill will not increase the water surface elevation of the base flood nor
cause any adverse impacts to the structure on site or other properties by wave
ramping or deflection.
1( 1) There shall be no alteration of sand dunes or mangrove stands which would
increase potential flood damage.
(12) All new construction and substantial improvements shall have the space below
the lowest floor either free of obstruction or constructed with nonsupporting
breakaway walls, 4= lattice work or deseFative insect screening intended to
collapse under the wind and water loads without causing collapse, displacement
or other structural damage to the elevated portion of the foundation or supporting
foundation system. For the purpose of this section, a breakaway wall shall have a
design safe loading resistance of not less than 10 and no more than 20 pounds
per square foot Use of breakaway walls which exceed a design safe loading
resistance of 20 pounds per square foot (either by design or when so required by
State of Florida or local codes) may be permitted only if a registered engineer or
architect certified that the designs proposed ' shall be allowed below the basee
flood elevation provided they are not part of the structural support of the building
and are designed so as to breakaway, under abnormally high tides or wave
action, without damage to the structural integrity of the building on which they are
to be used _
a. No selid wall shall be allewed; and
h Matermal shall nnnsist of lattine or mesh snreeni _ g only
(13) if aesthetic Gat ii ^e work OF SGreening enclosed space
shall not be designed to be used for human habitation, but shall be
designed to be used only for parking of vehicles, building access, or
limited storage of maintenance equipment used in connection with the
premises. Such space shall not be finished, partitioned into multiple rooms
or temperature - controlled.
(14) Prohibit the placement of manufactured homes (mobile homes), except in an
existing manufactured home (mobile home) park or subdivision. A replacement
manufactured home may be placed on a lot in an existing manufactured home
park or subdivision provided the anchoring standards of section 8- 31(b), and the
elevation standards of section 8 -32(a) are met.
Sec. 8 -33. Standards for StFeGm A -Zones without established base flood elevations and /eF or
regulatory floodways.
Located within the areas of special flood hazard established in section 8 -7, where sma
there exist A Zones streams exist but where no base flood data have been provided or
where no floodways have been provided, the following provisions apply:
(a) Require standards of Section 8 -32 be enforced. base flead elevation data
then the local obtawn, Fev;ew, and reasonably
utilize
any base
flood elevatweR and floodway data available frern a federal,
state, E)F
other GE)UFGe
AGENDA ITEM # 7E
SEPTEMBER 26, 2011
(b) Require that all new subdivision proposals and other proposed
developments (including proposals for manufactured home parks and
subdivisions) greater than 50 lots or 5 acres, whichever is lesser, include
within such proposals base flood elevation data. Standards set forth in
Section 8 -32 shall apply. flood
f material or st ructures , sh be permitted unless oortif atkm by o
registered professional engineer is provided dernORstrating that the
su ti
_eleya� on o b ase flood mere than one (1) feet at any point
within the GOFnrnunity. The e aerfif should be supported
by t8GhRiGal d'ca that GOnfl&r.m.1s; idraulin onnipoorinn
prim
(c) The Floodplain Administrator shall obtain, review, and reasonably utilize any
base flood elevation and floodway data available from a Federal, State of Florida,
or any other source, in order to administer the provisions of this ordinance. When
such data is utilized, provisions of Section 8 -32 shall apply. The Floodplain
Administrator shall:
a) Obtain the elevation (in relation to the mean sea level) of the lowest
floor (including the basement) of all new and substantially improved
structures.
b) Obtain, if the structure has been floodproofed in accordance with the
requirements of Section 8 -32, the elevation in relation to the mean sea
level to which the structure has been floodproofed, and
c) Maintain a record of all information.
111 SpeGial floed hazard areas without base flood elevation and floodway data,
ReW GonStFUGtiOR and substantial of existing StFUGWres shall have
the lowest floor of the lowest enGlesed area (iRGluding baserneRt) elevated no
less than two (2) feet above the highest adjaGent grade at the buildirlg—&--
(d) Notify, in Riverine situations, adjacent communities, the Florida Department of
Community Affairs- NFIP Coordinating Office, and the St. Johns River Water
Management District prior to any alteration or relocation of a watercourse, and
submit copies of such notifications to FEMA. A minimum finished floor elevation
of one (1) feet above the GFGWR of the read of fthhe npearies-st. adjaGent roadway shall
be maintained in all fleed zones.
(e) Assure that the flood carrying capacity within the altered or relocated portion of
any watercourse is maintained. , '
dUGtwerk —etG. shall —be— allowed below the base fleed elevation plus the
f) Manufactured homes shall be installed using methods and practices that
minimize flood damage. They must be elevated and anchored to prevent
floatation, collapse, and lateral movement. Methods of anchoring may include,
but are not limited to, use of over - the -top or frame ties to the ground anchors.
This requirement is in addition to applicable State of Florida and local anchoring
requirements for resisting wind forces.
AGENDA ITEM # 7E
SEPTEMBER 26, 20I 1
(g) When the data is not available from any source, in accordance with standards set
forth in Section 8 -32 the lowest floor of the structure shall be elevated to no
lower than three feet above the highest adiacent grade. Standards set forth in
Section 8 -32 shall apply.
Sec. 5 -34. Standards for subdivision proposals.
(a) All subdivision proposals shall be consistent with the need to minimize flood damage.
(b) All subdivision proposals shall have public utilities and facilities such as sewer, gas
electrical and water systems located and constructed to minimize flood damage.
(c) All subdivision proposals shall have adequate drainage provided to reduce exposure to
flood hazards;
(d) Base flood elevation data shall be provided for subdivision proposals and other
proposed development (including manufactured home parks and subdivisions) which is
greater than the lesser of fifty (50) lots or five (5) acres.
Sec. 5 -35. Standards for areas of shallow flooding (AO Zones).
Located within the areas of special flood hazard established in section 8 -7, are areas
designated as shallow flooding areas. These areas have special flood hazards associated with
base flood depths of one to three (3) feet where a clearly defined channel does not exist and
where the path of flooding is unpredictable and indeterminate; therefore, the following provisions
apply:
(a) All new construction and substantial improvements of residential structures in all
AO Zones shall have the lowest floor, including 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
basement, shall be elevated, at least tw —, three 3 I feet above the highest
adjacent grade.
(b) All new construction and substantial improvements of nonresidential structures
shall:
(1) Have the lowest floor, including 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
basement shall be elevated at least +w—i=, 1hree 3 _L_J feet above the
highest adjacent grade; or
(2) Together with attendant utility and sanitary facilities be completely
floodproofed no less than one foot to er 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.
(3) Adequate drainage paths around structures shall be provided on slopes
to auide water awav from structures.
(4) Fully enclosed areas below the lowest floor that are subiect to flooding
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