[HISTORY: Adopted by the Common Council of
the City of Oswego 6-27-1994 by L.L. No. 6-1994; amended in its entirety 10-23-2023 by L.L. No.
3-2023. Subsequent amendments noted where applicable.]
The Common Council of the City of Oswego finds that the potential
and/or actual damages from flooding and erosion may be a problem to
the residents of the City of Oswego and that such damages may include
destruction or loss of private and public housing, damage to public
facilities, both publicly and privately owned, and injury to and loss
of human life. In order to minimize the threat of such damages and
to achieve the purposes and objectives hereinafter set forth, this
chapter is adopted.
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:
A.
Regulate 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.
B.
Require that uses vulnerable to floods, including facilities which
serve such uses, be protected against flood damage at the time of
initial construction.
C.
Control the alteration of natural floodplains, stream channels, and
natural protective barriers which are involved in the accommodation
of floodwaters.
D.
Control filling, grading, dredging and other development which may
increase erosion or flood damages.
E.
Regulate the construction of flood barriers which will unnaturally
divert floodwaters or which may increase flood hazards to other lands.
F.
Qualify for and maintain participation in the National Flood Insurance
Program.
The objectives of this chapter are to:
A.
Protect human life and health.
B.
Minimize expenditure of public money for costly flood control projects.
C.
Minimize the need for rescue and relief efforts associated with flooding
and generally undertaken at the expense of the general public.
D.
Minimize prolonged business interruptions.
E.
Minimize damage to public facilities and utilities such as water
and gas mains, electric, telephone, sewer lines, streets and bridges
located in areas of special flood hazard.
F.
Help maintain a stable tax base by providing for the sound use and
development of areas of special flood hazard so as to minimize future
flood blight areas.
G.
Provide that developers are notified that property is in an area
of special flood hazard.
H.
Ensure that those who occupy the areas of special flood hazard assume
responsibility for their actions.
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 its most reasonable
application.
A structure used solely for parking (two-car detached garages
or smaller) or limited storage, represent a minimal investment of
not more than 10% of the value of the primary structure, and may not
be used for human habitation.
A request for a review of the local administrator's interpretation
of any provision of this chapter or a request for a variance.
A designated AO, AH or VO Zone on a community's Flood Insurance
Rate Map (FIRM) with a one-percent-or-greater annual chance of flooding
to an average annual depth of one to three feet where a clearly defined
channel does not exist, where the path of flooding is unpredictable
and where velocity flow may be evident. Such flooding is characterized
by ponding or sheet flow.
The land in the floodplain within a community subject to
a one-percent-or-greater chance of flooding in any given year. This
area may be designated as Zone A, AE, AH, AO, A1 through A30, A99,
V, VO, VE, or V1 through V30. It is also commonly referred to as the
"base floodplain" or "one-hundred-year floodplain." For purposes of
this chapter, the term "special flood hazard area (SFHA)" is synonymous
in meaning with the phrase "area of special flood hazard."
The flood having a one-percent chance of being equaled or
exceeded in any given year.
That portion of a building having its floor subgrade (below
ground level) on all sides.
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.
See "structure."
Has the same meaning as "basement."
An area within a SFHA, landward of a V1 through V30, VE,
or V zone, or landward of an open coast without mapped coastal hazard
areas. In a Coastal A Zone, the principal source of flood must be
astronomical tides, storm surges, seiches, or tsunamis, not riverine
flooding. During the base flood conditions, the potential for breaking
wave height shall be greater than or equal to 18 inches (457 mm).
The inland limit of Coastal A Zone is: (a) the limit of moderate wave
action if delineated on a FIRM; or (b) designated by the authority
having jurisdiction.
An area of special flood hazard extending from offshore to
the inland limit of a primary frontal dune along an open coast and
any other area subject to high-velocity wave action from storms or
seismic sources. The area is designated on a FIRM as Zone V1 through
V30, VE, VO or V.
An enclosed area beneath the lowest elevated floor, 18 inches
or more in height, which is used to service the underside of the lowest
elevated floor. The elevation of the floor of this enclosed area,
which may be of soil, gravel, concrete or other material, must be
equal to or above the lowest adjacent exterior grade. The enclosed
crawl space area shall be properly vented to allow for the equalization
of hydrostatic forces which would be experienced during periods of
flooding.
Structures or facilities that produce, use, or store highly
volatile, flammable, explosive, toxic and/or water-reactive materials;
Hospitals, nursing homes, and housing likely to contain occupants
who may not be sufficiently mobile to avoid death or injury during
a flood;
Police stations, fire stations, vehicle and equipment storage
facilities, and emergency operations centers that are needed for flood
response activities before, during, and after a flood; and
Public and private utility facilities that are vital to maintaining
or restoring normal services to flooded areas before, during, and
after a flood.
Any reconstruction, rehabilitation, addition, or other improvement
of a structure that equals or exceeds 50% of the market value of the
structure at the time of the improvement or repair when counted cumulatively
for 10 years.
Any man-made change to improved or unimproved real estate,
including but not limited to buildings or other structures, mining,
dredging, filling, paving, excavation or drilling operations or storage
of equipment or materials.
A non-basement building:
Built, in the case of a building in Zones A1 through A30, AE,
A, A99, AO, AH, B, C, X, or D, to have the top of the elevated floor,
or in the case of a building in Zones V1 through 30, VE, or V, to
have the bottom of the lowest horizontal structure member of the elevated
floor, elevated above the ground level by means of pilings, columns
(posts and piers), or shear walls parallel to the flow of the water;
and
Adequately anchored so as not to impair the structural integrity
of the building during a flood of up to the magnitude of the base
flood.
In the case of Zones A1 through A30, AE, A, A99, AO, AH, B,
C, X, or D, "elevated building" also includes a building elevated
by means of fill or solid foundation perimeter walls with openings
sufficient to facilitate the unimpeded movement of floodwaters.
In the case of Zones V1 through V30, VE, or V, "elevated building"
also includes a building otherwise meeting the definition of "elevated
building," even though the lower area is enclosed by means of breakaway
walls that meet the federal standards.
The federal agency that administers the National Flood Insurance
Program.
An official map of the community published by the Federal
Emergency Management Agency as part of a riverine community's Flood
Insurance Study. The FBFM delineates a regulatory floodway along watercourses
studied in detail in the Flood Insurance Study.
An examination, evaluation and determination of the flood
hazards and, if appropriate, corresponding water surface elevations,
or an examination, evaluation and determination of flood-related erosion
hazards.
An official map of a community, issued by the Federal Emergency
Management Agency, where the boundaries of the areas of special flood
hazard have been designated as Zone A but no flood elevations are
provided.
An official map of a community, on which the Federal Emergency
Management Agency has delineated both the areas of special flood hazard
and the risk premium zones applicable to the community.
See "flood elevation study."
The collapse or subsidence of land along the shore of a lake or other body of water as a 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 a flash flood or an abnormal tidal surge, or by some similarly unusual and unforeseeable event which results in flooding as defined in Subsection A above.
Any land area susceptible to being inundated by water from
any source. (See definition of "flooding.")
Any combination of structural and nonstructural additions,
changes, or adjustments to structures which reduce or eliminate flood
damage to real estate or improved real property, water and sanitary
facilities, structures and their contents.
Has the same meaning as "regulatory floodway."
A use which cannot perform 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, and ship repair facilities. The term
does not include long-term storage, manufacturing, sales, or service
facilities.
The highest natural elevation of the ground surface, prior
to construction, next to the proposed walls of a structure.
Any structure that is:
Listed individually in the National Register of Historic Places
(a listing maintained by the Department of the Interior) or preliminarily
determined by the Secretary of the Interior as meeting the requirements
for individual listing on the National Register;
Certified or preliminarily determined by the Secretary of the
Interior as contributing to the historical significance of a registered
historic district or a district preliminarily determined by the Secretary
to qualify as a registered historic district;
Individually listed on a state inventory of historic places
in states with historic preservation programs which have been approved
by the Secretary of the Interior; or
Individually listed on a local inventory of historic places
in communities with historic preservation programs that have been
certified either:
The line shown on the FIRMs to indicate the inland limit
of the eighteen-inch (457 mm) breaking wave height during the base
flood.
The person appointed by the community to administer and implement
this chapter by granting or denying development permits in accordance
with its provisions. This person is often the Building Inspector,
Code Enforcement Officer, or employee of an engineering department.
Lowest floor of the lowest enclosed area (including basement
or cellar). 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 of
this chapter.
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 does not include a recreational vehicle.
A parcel (or contiguous parcels) of land divided into two
or more manufactured home lots for rent or sale.
For purposes of the National Flood Insurance Program, the
National Geodetic Vertical Datum (NGVD) of 1929, the North American
Vertical Datum of 1988 (NAVD 88), or other datum to which base flood
elevations shown on a community's Flood Insurance Rate Map are referenced.
Has the same meaning as "manufactured home."
Structures for which the start of construction commenced
on or after the effective date of a floodplain management regulation
adopted by the community and includes any subsequent improvements
to such structure.
Has the same meaning as "base flood."
A continuous or nearly continuous mound or ridge of sand
with relatively steep seaward and landward slopes immediately landward
and adjacent to the beach and subject to erosion and overtopping from
high tides and waves during major 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.
At least 51% of the actual cash value of the structure, excluding
land value, is above the ground.
A vehicle which is:
Built on a single chassis;
Four hundred square feet or less when measured at the largest
horizontal projections;
Designed to be self-propelled or permanently towable by a light-duty
truck; and
Not designed primarily for use as a permanent dwelling but as
temporary living quarters for recreational, camping, travel, or seasonal
use.
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 as determined by the Federal Emergency Management Agency in a Flood Insurance Study or by other agencies as provided in § 133-14B of this chapter.
Naturally occurring accumulations of sand in ridges or mounds
landward of the beach.
The date of permit issuance for new construction and substantial
improvements to existing structures, provided that the actual start
of construction, repair, reconstruction, rehabilitation, addition
placement, or other improvement is within 180 days after the date
of issuance. The actual start of construction means the first placement
of permanent construction of a building (including a manufactured
home) on a site, such as the pouring of a slab or footings, installation
of pilings or construction of columns. Permanent construction does
not include land preparation (such as clearing, excavation, grading,
or filling), or the installation of streets or walkways, or excavation
for a basement, footings, piers or foundations, or the erection of
temporary forms, or the installation of accessory buildings such as
garages or sheds not occupied as dwelling units or not part of the
main building. For a substantial improvement, the actual "start of
construction" means the first alteration of any wall, ceiling, floor,
or other structural part of a building, whether or not that alteration
affects the external dimensions of the building.
A walled and roofed building, including a gas or liquid storage
tank, that is principally above the ground, as well as a manufactured
home.
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% of the market value of the structure before the
damage occurred. Substantial damage also means flood-related damages
sustained by a structure on two separate occasions during a ten-year
period for which the cost of repairs at the time of such flood event,
on the average, equals or exceeds 25% of the market value of the structure
before the damage occurred.
Any reconstruction, rehabilitation, addition, or other improvement
of a structure, the cost of which equals or exceeds 50% of the market
value of the structure before the start of construction of the improvement.
"Substantial improvement" also means "cumulative substantial improvement."
The term includes structures which have incurred substantial damage,
regardless of the actual repair work performed. The term does not,
however, include either:
Any project for improvement of a structure to correct existing
violations of state or local health, sanitary, or safety code specifications
which have been identified by the local code enforcement official
and which are the minimum necessary to assure safe living conditions;
or
Any alteration of an historic structure, provided that the alteration
will not preclude the structure's continued designation as an historic
structure.
A grant of relief from the requirements of this chapter which
permits construction or use in a manner that would otherwise be prohibited
by this chapter.
The failure of a structure or other development to be fully
compliant with the community's floodplain management regulations.
This chapter shall apply to all areas of special flood hazard
within the jurisdiction of the City of Oswego, Oswego County, New
York.
A.
The areas of special flood hazard for the City of Oswego, Community
Number 360656, are identified and defined on the following documents
prepared by the Federal Emergency Management Agency:
[Amended 8-26-2024 by L.L. No. 2-2024]
(1)
Flood Insurance Rate Map Panel Numbers: 36075CO270G, 36075CO278G,
36075CO286G, whose effective date is June 18, 2013, and any subsequent
revisions to these map panels that do not affect areas under our community's
jurisdiction.
(2)
FIRM Index No. 36075CIND0B and Panel Numbers: 36075CO25711, 36075CO258H,
36075CO259H, 36075CO276H, whose effective date is November 16, 2023,
and any subsequent revisions to these map panels that do not affect
areas under our community's jurisdiction.
(3)
A scientific
and engineering report entitled, "Flood Insurance Study, Oswego County,
New York, All Jurisdictions," dated November 16, 2023.
(4)
Letter
of Map Revision (LOMR), Case No. 23-02-0639P, effective October 10,
2024, revising FIRM panel 36075CO259H, Flood Insurance Study Profile
38P, and Summary of Discharges Table 9.
B.
The above documents are hereby adopted and declared to be a part
of this chapter. The Flood Insurance Study and/or maps are on file
at: the Oswego City Engineer's Office, Third Floor, City Hall, 13
West Oneida Street, Oswego, New York 13126.
A.
This chapter includes all revisions to the National Flood Insurance
Program through October 27, 1997, and shall supersede all previous
chapters adopted for the purpose of flood damage prevention.
B.
In their interpretation and application, the provisions of this chapter
shall be held to be minimum requirements, adopted for the promotion
of the public health, safety, and welfare. Whenever the requirements
of this chapter are at variance with the requirements of any other
lawfully adopted rules, regulations, or ordinances, the most restrictive,
or that imposing the higher standards, shall govern.
The invalidity of any section or provision of this chapter shall
not invalidate any other section or provision thereof.
No structure in an area of special flood hazard shall hereafter be constructed, located, extended, converted, or altered and no land shall be excavated or filled without full compliance with the terms of this chapter and any other applicable regulations. Any infraction of the provisions of this chapter by failure to comply with any of its requirements, including infractions of conditions and safeguards established in connection with conditions of the permit, shall constitute a violation. Any person who violates this chapter or fails to comply with any of its requirements shall, upon conviction thereof, be fined no more than $250 or imprisoned for not more than 15 days or both. Each day of noncompliance shall be considered a separate offense. Nothing herein contained shall prevent the City of Oswego from taking such other lawful action as necessary to prevent or remedy an infraction. Any structure found not compliant with the requirements of this chapter for which the developer and/or owner has not applied for and received an approved variance under § 133-25 will be declared noncompliant and notification sent to the Federal Emergency Management Agency.
The degree of flood protection required by this chapter is considered
reasonable for regulatory purposes and is based on scientific and
engineering considerations. Larger floods can and will occur on rare
occasions. Flood heights may be increased by man-made or natural causes.
This chapter does not imply that land outside the area of special
flood hazards or uses permitted within such areas will be free from
flooding or flood damages. This chapter shall not create liability
on the part of the City of Oswego, any officer or employee thereof,
or the Federal Emergency Management Agency, for any flood damages
that result from reliance on this chapter or any administrative decision
lawfully made thereunder.
The City Engineer is hereby appointed local administrator to
administer and implement this chapter by granting or denying floodplain
development permits in accordance with its provisions.
A.
Purpose. A floodplain development permit is hereby established for all construction and other development to be undertaken in areas of special flood hazard in this community for the purpose of protecting its citizens from increased flood hazards and ensuring that new development is constructed in a manner that minimizes its exposure to flooding. It shall be unlawful to undertake any development in an area of special flood hazard, as shown on the Flood Insurance Rate Map enumerated in § 133-6, without a valid floodplain development permit. Application for a permit shall be made on forms furnished by the local administrator and may include, but not be limited to: plans, in duplicate, drawn to scale and 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.
B.
Fees. All applications for a floodplain development permit shall
be accompanied by an application fee of $100. In addition, the applicant
shall be responsible for reimbursing the City of Oswego for any additional
costs necessary for review, inspection and approval of this project.
The local administrator may require a deposit of no more than $500
to cover these additional costs.
The applicant shall provide the following information as appropriate.
Additional information may be required on the permit application form.
A.
The proposed elevation, in relation to mean sea level, of the lowest
floor (including basement or cellar) of any new or substantially improved
structure to be located in a Special Flood Hazard Area ( SFHA). Upon
completion of the lowest floor, the permittee shall submit to the
local administrator the as-built elevation, certified by a licensed
professional engineer or surveyor.
B.
The proposed elevation, in relation to mean sea level, of the bottom
of the lowest structural member of the lowest floor (excluding pilings
and columns) of any new or substantially improved structure to be
located in Zones V1 through V30 or VE, or Zone V if base flood elevation
data are available. Upon completion of the lowest floor, the permittee
shall submit to the local administrator the as-built elevation, certified
by a licensed professional engineer or surveyor.
C.
The proposed elevation, in relation to mean sea level, to which any
new or substantially improved nonresidential structure will be floodproofed.
Upon completion of the floodproofed portion of the structure, the
permittee shall submit to the local administrator the as-built floodproofed
elevation, certified by a professional engineer or surveyor.
D.
A certificate from a licensed professional engineer or architect that any utility floodproofing will meet the criteria in § 133-16C, Utilities.
E.
A certificate from a licensed professional engineer or architect that any nonresidential floodproofed structure will meet the floodproofing criteria in § 133-20, Nonresidential structures.
F.
A description of the extent to which any watercourse will be altered or relocated as a result of proposed development. Computations by a licensed professional engineer must be submitted that demonstrate that the altered or relocated segment will provide equal or greater conveyance than the original stream segment. The applicant must submit any maps, computations or other material required by the Federal Emergency Management Agency (FEMA) to revise the documents enumerated in § 133-6, when notified by the local administrator, and must pay any fees or other costs assessed by FEMA for this purpose. The applicant must also provide assurances that the conveyance capacity of the altered or relocated stream segment will be maintained.
G.
A technical analysis, by a licensed professional engineer, if required
by the local administrator, which shows whether proposed development
to be located in an area of special flood hazard may result in physical
damage to any other property.
H.
In Zone A, when no base flood elevation data are available from other
sources, base flood elevation data shall be provided by the permit
applicant for subdivision proposals and other proposed developments
(including proposals for manufactured home and recreational vehicle
parks and subdivisions) that are greater than either 50 lots or five
acres.
I.
In Zones V1 through V30 and VE, and also Zone V if base flood elevations
are available, designs and specifications, certified by a licensed
professional engineer or architect, for any breakaway walls in a proposed
structure with design strengths in excess of 20 pounds per square
foot.
J.
In Zones V1 through V30 and VE, and also Zone V if base flood elevation
are available, for all new and substantial improvements to structures,
floodplain development permit applications shall be accompanied by
design plans and specifications, prepared in sufficient detail to
enable independent review of the foundation support and connection
components. Said plans and specifications shall be developed or reviewed
by a licensed professional engineer or architect, and shall be accompanied
by a statement, bearing the signature of the architect or engineer,
certifying that the design and methods of construction to be used
are in accordance with accepted standards of practice and with all
applicable provisions of this chapter.
Duties of the local administrator shall include, but not be
limited to the following:
A.
Permit application review. The local administrator shall conduct
the following permit application review before issuing a floodplain
development permit:
(1)
Review all applications for completeness, particularly with the requirements of § 133-13, Application for permit, and for compliance with the provisions and standards of this chapter.
(2)
Review subdivision and other proposed new development, including manufactured home parks to determine whether proposed building sites will be reasonably safe from flooding. If a proposed building site is located in an area of special flood hazard, all new construction and substantial improvements shall meet the applicable standards of §§ 133-15 through 133-24 and, in particular, § 133-15B, Subdivision proposals.
(3)
Determine whether any proposed development in an area of special flood hazard may result in physical damage to any other property (e.g., stream bank erosion and increased flood velocities). The local administrator may require the applicant to submit additional technical analyses and data necessary to complete the determination. If the proposed development may result in physical damage to any other property or fails to meet the requirements of §§ 133-15 through 133-24, no permit shall be issued. The applicant may revise the application to include measures that mitigate or eliminate the adverse effects and resubmit the application.
(4)
Determine that all necessary permits have been received from those
governmental agencies from which approval is required by state or
federal chapter.
B.
Use of other flood data.
(1)
When the Federal Emergency Management Agency has designated areas of special flood hazard on the community's Flood Insurance Rate Map (FIRM) but has neither produced water surface elevation data (These areas are designated Zone A or V on the FIRM.) nor identified a floodway, the local administrator shall obtain, review and reasonably utilize any base flood elevation and floodway data available from a federal, state or other source, including data developed pursuant to § 133-13H, as criteria for requiring that new construction, substantial improvements or other proposed development meet the requirements of this chapter.
(2)
When base flood elevation data are not available, the local administrator
may use flood information from any other authoritative source, such
as historical data, to establish flood elevations within the areas
of special flood hazard, for the purposes of this chapter.
C.
Alteration of watercourses. The local administrator shall:
(1)
Notify adjacent communities that may be affected and the New York
State Department of Environmental Conservation prior to permitting
any alteration or relocation of a watercourse, and submit evidence
of such notification to the Regional Administrator, Region II, Federal
Emergency Management Agency.
(2)
Determine that the permit holder has provided for maintenance within
the altered or relocated portion of said watercourse so that the flood-carrying
capacity is not diminished.
D.
Construction stage. The local administrator shall:
(1)
In Zones A1 through A30, AE and AH, and also Zone A if base flood
elevation data are available, upon placement of the lowest floor or
completion of floodproofing of a new or substantially improved structure,
obtain from the permit holder a certification of the as-built elevation
of the lowest floor or floodproofed elevation, in relation to mean
sea level. The certificate shall be prepared by or under the direct
supervision of a licensed land surveyor or professional engineer and
certified by same. For manufactured homes, the permit holder shall
submit the certificate of elevation upon placement of the structure
on the site. A certificate of elevation must also be submitted for
a recreational vehicle if it remains on a site for 180 consecutive
days or longer (unless it is fully licensed and ready for highway
use).
(2)
In Zones V1 through V30 and VE, and also Zone V if base flood elevation
data are available, or in an area of moderate wave action, upon placement
of the lowest floor of a new or substantially improved structure,
the permit holder shall submit to the local administrator a certificate
of elevation, in relation to mean sea level, of the bottom of the
lowest structural member of the lowest floor (excluding pilings and
columns). The certificate shall be prepared by or under the direct
supervision of a licensed land surveyor or professional engineer and
certified by same. For manufactured homes, the permit holder shall
submit the certificate of elevation upon placement of the structure
on the site. An elevation certificate must also be submitted for a
recreational vehicle if it remains on a site 180 consecutive days
or longer (unless it is fully licensed and ready for highway use).
(3)
Any further work undertaken prior to submission and approval of the
certification shall be at the permit holder's risk. The local administrator
shall review all data submitted. Deficiencies detected shall be cause
to issue a stop-work order for the project unless immediately corrected.
E.
Inspections. The local administrator and/or the developer's engineer
or architect shall make periodic inspections at appropriate times
throughout the period of construction in order to monitor compliance
with permit conditions and enable said inspector to certify, if requested,
that the development is in compliance with the requirements of the
floodplain development permit and/or any variance provisions.
F.
Stop-work orders.
(1)
The local administrator shall issue, or cause to be issued, a stop-work order for any floodplain development found ongoing without a development permit. Disregard of a stop-work order shall subject the violator to the penalties described in § 133-9 of this chapter.
(2)
The local administrator shall issue, or cause to be issued, a stop-work order for any floodplain development found noncompliant with the provisions of this chapter and/or the conditions of the development permit. Disregard of a stop-work order shall subject the violator to the penalties described in § 133-9 of this chapter.
G.
Certificate of compliance.
(1)
In areas of special flood hazard, as determined by documents enumerated in § 133-6, it shall be unlawful to occupy or to permit the use or occupancy of any building or premises, or both, or part thereof hereafter created, erected, changed, converted or wholly or partly altered or enlarged in its use or structure until a certificate of compliance has been issued by the local administrator stating that the building or land conforms to the requirements of this chapter.
(2)
A certificate of compliance shall be issued by the local administrator
upon satisfactory completion of all development in areas of special
flood hazard.
H.
Information to be retained. The local administrator shall retain
and make available for inspection, copies of the following:
(1)
Floodplain development permits and certificates of compliance;
(2)
Certifications of as-built lowest floor elevations of structures, required pursuant to § 133-14D(1) and (2), and whether or not the structures contain a basement;
(3)
Floodproofing certificates required pursuant to § 133-14D(1), and whether or not the structures contain a basement;
The following standards apply to new development, including new and substantially improved structures, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in § 133-6.
A.
Coastal high-hazard areas and Coastal A Zones. The following requirements
apply within Zones V1 through V30, VE and V:
(1)
All new construction, including manufactured homes and recreational
vehicles on site 180 days or longer and not fully licensed for highway
use, shall be located landward of the reach of high tide.
(2)
The use of fill for structural support of buildings, manufactured
homes or recreational vehicles on site 180 days or longer is prohibited.
(3)
Man-made alteration of sand dunes which would increase potential
flood damage is prohibited.
B.
Subdivision and development proposals. The following standards apply
to all new subdivision proposals and other proposed development in
areas of special flood hazard (including proposals for manufactured
home and recreational vehicle parks and subdivisions):
(1)
Proposals shall be consistent with the need to minimize flood damage;
(2)
Public utilities and facilities such as sewer, gas, electrical and
water systems shall be located and constructed so as to minimize flood
damage;
(3)
Adequate drainage shall be provided to reduce exposure to flood damage;
(4)
Proposed
development shall not result in physical damage to other property
(e.g., stream bank erosion or increased flood velocities). If requested
by the local administrator, the applicant shall provide a technical
analysis, by a licensed professional engineer, demonstrating that
this condition has been met.
(5)
Proposed
development shall be designed, located, and constructed so as to offer
the minimum resistance of the flow of water and shall be designed
to have a minimum effect upon the height of floodwater.
(6)
Any
equipment or materials located in a special flood hazard area shall
be elevated, anchored, and floodproofed as necessary to prevent flotation,
flood damage, and the release of hazardous substances.
(7)
No
alteration or relocation of a watercourse shall be permitted unless:
(a)
A technical evaluation by a licensed professional engineer demonstrates
that the altered or relocated segment will provide conveyance equal
to or greater than of the original stream segment and will not result
in physical damage to any other property;
(b)
If warranted, a conditional revision of the Flood Insurance Rate
Map is obtained from the Federal Emergency Management Agency, with
the applicant providing the necessary data, analyses, and mapping
and reimbursing the City of Oswego for all fees and other costs in
relation to the application; and
(c)
The applicant provides assurance that maintenance will be provided
so that the flood-carrying capacity of the altered or relocated portion
of the watercourse will not be diminished.
C.
Encroachments.
(1)
Within Zones A1 through A30 and AE, on streams without a regulatory
floodway, no new construction, substantial improvements or other development
(including fill) shall be permitted unless:
(a)
The applicant demonstrates 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 location; or
(b)
The City of Oswego agrees to apply to the Federal Emergency
Management Agency (FEMA) for a conditional FIRM revision, FEMA approval
is received and the applicant provides all necessary data, analyses
and mapping and reimburses the City of Oswego for all fees and other
costs in relation to the application. The applicant must also provide
all data, analyses and mapping and reimburse the City of Oswego for
all costs related to the final map revision.
(2)
On streams with a regulatory floodway, as shown on the Flood Boundary and Floodway Map or the Flood Insurance Rate Map adopted in § 133-6, no new construction, substantial improvements or other development in the floodway (including fill) shall be permitted unless:
(a)
A technical evaluation by a licensed professional engineer shows
that such an encroachment shall not result in any increase in flood
levels during occurrence of the base flood; or
(b)
The City of Oswego agrees to apply to the Federal Emergency
Management Agency (FEMA) for a conditional FIRM and floodway revision,
FEMA approval is received and the applicant provides all necessary
data, analyses and mapping and reimburses the City of Oswego for all
fees and other costs in relation to the application. The applicant
must also provide all data, analyses and mapping and reimburse the
City of Oswego for all costs related to the final map revisions.
(3)
In
a Special Flood Hazard Area (SFHA), if any development is found to
increase or decrease base flood elevations, the City of Oswego shall,
as soon as practicable, but not later than six months after the date
such information becomes available, notify FEMA and the New York State
Department of Environmental Conservation of the changes by submitting
technical or scientific data in accordance with standard engineering
practice.
(4)
Whenever any portion of a floodplain is authorized for development,
the volume of space occupied by the authorized fill or structure below
the base flood elevation shall be compensated for and balanced by
a hydraulically equivalent volume of excavation taken from below the
base flood elevation at or adjacent to the development site. All such
excavations shall be constructed to drain freely to the watercourse.
No area below the waterline of a pond or other body of water can be
credited as a compensating excavation.
The following standards apply to new development, including new and substantially improved structures, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in § 133-6.
A.
Anchoring. New structures and substantial improvement to structures
in areas of special flood hazard shall be anchored to prevent flotation,
collapse, or lateral movement during the base flood. This requirement
is in addition to applicable state and local anchoring requirements
for resisting wind forces.
B.
Construction materials and methods.
(1)
New construction and substantial improvements to structures shall
be constructed with materials and utility equipment resistant to flood
damage.
(2)
New construction and substantial improvements to structures shall
be constructed using methods and practices that minimize flood damage.
(3)
Enclosed areas.
(a)
For enclosed areas below the lowest floor of a structure within
Zones A1 through A30, AE, AO or A, new and substantially improved
structures shall have fully enclosed areas below the lowest floor
that are usable solely for parking of vehicles, building access or
storage in an area other than a basement and which are subject to
flooding, designed to automatically equalize hydrostatic flood forces
on exterior walls by allowing for the entry and exit of floodwaters.
Designs for meeting this requirement must either be certified by a
licensed professional engineer or architect or meet or exceed the
following minimum criteria:
[1]
A minimum of two openings 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; and
[2]
The bottom of all such openings no higher than one foot above
the lowest adjacent finished grade.
[3]
Openings not less than three inches in any direction.
(b)
Openings may be equipped with louvers, valves, screens or other
coverings or devices, provided they permit the automatic entry and
exit of floodwaters. Enclosed areas subgrade on all sides are considered
basements and are not permitted.
(4)
Within Zones V1 through V30 and VE, and also within Zone V if base
flood elevation are available, new construction and substantial improvements
shall have the space below the lowest floor either free from obstruction
or constructed with nonsupporting breakaway walls, open wood latticework
or insect screening intended to collapse under wind and water loads
without causing collapse, displacement, or other structural damage
to the elevated portion of the building or supporting foundation system.
The enclosed space below the lowest floor shall be used only for parking
vehicles, building access or storage. Use of this space for human
habitation is expressly prohibited. The construction of stairs, stairwells
and elevator shafts are subject to the design requirements for breakaway
walls.
C.
Utilities.
(1)
New and replacement electrical equipment, heating, ventilating, air
conditioning, plumbing connections, and other service equipment shall
be located at least two feet above the base flood elevation or be
designed to prevent water from entering and accumulating within the
components during a flood and to resist hydrostatic and hydrodynamic
loads and stresses. Electrical wiring and outlets, switches, junction
boxes and panels shall be elevated or designed to prevent water from
entering and accumulating within the components unless they conform
to the appropriate provisions of the electrical part of the Building
Code of New York State or the Residential Code of New York State for
location of such items in wet locations.
(2)
New and replacement water supply systems shall be designed to minimize
or eliminate infiltration of floodwaters into the system.
(3)
New and replacement sanitary sewage systems shall be designed to
minimize or eliminate infiltration of floodwaters. Sanitary sewer
and storm drainage systems for buildings that have openings below
the base flood elevation shall be provided with automatic backflow
valves or other automatic backflow devices that are installed in each
discharge line passing through a building's exterior wall.
(4)
On-site waste disposal systems shall be located to avoid impairment
to them or contamination from them during flooding.
A.
Underground
tanks shall be anchored to prevent flotation, collapse, and lateral
movement during conditions of the base flood.
A.
Elevation: The following standards apply to new and substantially improved residential structures located in areas of special flood hazard, in addition to the requirements in § 133-15B, Subdivision proposals, and C, Encroachments, and § 133-16, Standards for all structures.
(1)
Within Zones A1 through A30, AE and AH, if base flood elevation data
are available, new construction and substantial improvements shall
have the lowest floor (including basement) elevated to or above two
feet above the base flood elevation. Within Zone AH, adequate drainage
paths are required to guide floodwaters around and away from proposed
structures on slopes.
(2)
Within Zone A, when no base flood elevation data are available, a
base flood elevation shall be determined by either:
(a)
Obtain and reasonably use data available from a federal, state, or
other source plus two feet of freeboard; or
(b)
Determine the base flood elevation in accordance with accepted hydrologic
and hydraulic engineering practice, plus two feet of freeboard. Determinations
shall be undertaken by a registered design professional, who shall
document that the technical methods used reflect currently accepted
engineering practice. Studies, analyses, and computations shall be
submitted in sufficient details to allow a thorough review and approval.
(3)
Within Zone AO, new and substantially improved structures shall have the lowest floor (including basement) elevated above the highest adjacent grade at least as high as the depth number specified in feet on the community's Flood Insurance Rate Map enumerated in § 133-6 plus one foot of freeboard. In areas designated as Zone AO, where a depth number is not specified on the map, the depth number shall be taken as equal to two feet. Within AO, adequate drainage paths are required to guide floodwaters around and away from proposed structures on slopes.
The following standards, in addition to the standards in § 133-15A, Coastal high-hazard areas and Coastal A Zones, and § 133-15B, Subdivision proposals, and § 133-16, Standards for all structures, apply to new and substantially improved residential structures located in areas of special flood hazard shown as Zones V1 through V30, VE or V on the community's Flood Insurance Rate Map designated in § 133-6.
A.
Elevation. New construction and substantial improvements shall be
elevated on pilings, columns or shear walls such that the bottom of
the lowest horizontal structural member supporting the lowest elevated
floor (excluding columns, piles, diagonal bracing attached to the
piles or columns, grade beams, pile caps and other members designed
to either withstand storm action or break away without imparting damaging
loads to the structure) is elevated to or above two feet above base
flood elevation so as not to impede the flow of water.
B.
Determination of loading forces. Structural design shall consider
the effects of wind and water loads acting simultaneously during the
base flood on all building components.
(1)
The structural design shall be adequate to resist water forces that
would occur during the base flood. Horizontal water loads considered
shall include inertial and drag forces of waves, current drag forces,
and impact forces from waterborne storm debris. Dynamic uplift loads
shall also be considered if bulkheads, walls, or other natural or
man-made flow obstructions could cause wave runup beyond the elevation
of the base flood.
(2)
Buildings shall be designed and constructed to resist the forces
due to wind pressure. Wind forces on the superstructure include windward
and leeward forces on vertical walls, uplift on the roof, internal
forces when openings allow wind to enter the house, and upward force
on the underside of the house when it is exposed. In the design, the
wind should be assumed to blow potentially from any lateral direction
relative to the house.
(3)
Wind-loading values used shall be those required by the building
code.
C.
Foundation standards.
(1)
The pilings or column foundation and structure attached thereto shall
be adequately anchored to resist flotation, collapse or lateral movement
due to the effects of wind and water pressures acting simultaneously
on all building components. Foundations must be designed to transfer
safely to the underlying soil all loads due to wind, water, dead load,
live load and other loads (including uplift due to wind and water).
(2)
Spread footings and fill material shall not be used for structural
support of a new building or substantial improvement of an existing
structure.
D.
Pile foundation design.
(1)
The design ratio of pile spacing to pile diameter shall not be less
than 8:1 for individual piles. (This shall not apply to pile clusters
located below the design grade.) The maximum center-to-center spacing
of wood piles shall not be more than 12 feet on center under load
bearing sills, beams, or girders.
(2)
Pilings shall have adequate soil penetration (bearing capacity) to
resist the combined wave and wind loads (lateral and uplift) associated
with the base flood acting simultaneously with typical structure (live
and dead) loads, and shall include consideration of decreased resistance
capacity caused by erosion of soil strata surrounding the piles. The
minimum penetration for foundation piles is to an elevation of five
feet below mean sea level (msl) datum if the BFE is +10 msl or less,
or to be at least 10 feet below msl if the BFE is greater than +10
msl.
(3)
Pile foundation analysis shall also include consideration of piles
in column action from the bottom of the structure to the stable soil
elevation of the site. Pilings may be horizontally or diagonally braced
to withstand wind and water forces.
(4)
The minimum acceptable sizes for timber piles are a tip diameter
of eight inches for round timber piles and eight inches by eight inches
for square timber piles. All wood piles must be treated in accordance
with requirements of EPEE-C3 to minimize decay and damage from fungus.
(5)
Reinforced concrete piles shall be cast of concrete having a twenty-eight-day
ultimate compressive strength of not less than 5,000 pounds per square
inch, and shall be reinforced with a minimum of four longitudinal
steel bars having a combined area of not less than 1% nor more than
4% of the gross concrete area. Reinforcing for precast piles shall
have a concrete cover of not less than 1 1/4 inches for No. 5
bars and smaller and not less than 1 1/2 inches for No. 6 through
No. 11 bars. Reinforcement for piles cast in the field shall have
a concrete cover of not less than two inches.
(6)
Piles shall be driven by means of a pile driver or drop hammer, jetted,
or augered into place.
(7)
Additional support for piles in the form of bracing may include lateral
or diagonal bracing between piles.
(8)
When necessary, piles shall be braced at the ground line in both
directions by a wood timber grade beam or a reinforced concrete grade
beam. These at-grade supports should be securely attached to the piles
to provide support even if scoured from beneath.
(9)
Diagonal bracing between piles, consisting of two-inch-by-eight-inch
(minimum) members bolted to the piles, shall be limited in location
to below the lowest supporting structural member and above the stable
soil elevation, and aligned in the vertical plane along pile rows
perpendicular to the shoreline. Galvanized steel rods (minimum diameter
1/2 inch) or cable-type bracing is permitted in any plane.
(10)
Knee braces, which stiffen both the upper portion of a pile
and the beam-to-pile connection, may be used along pile rows perpendicular
and parallel to the shoreline. Knee braces shall be two-by-eight lumber
bolted to the sides of the pile/beam, or four-by-four-or-larger braces
framed into the pile/beam. Bolting shall consist of two five-eighths-inch
galvanized steel bolts (each end) for two-by-eight members, or one
five-eighths-inch lag bolt (each end) for square members. Knee braces
shall not extend more than three feet below the elevation of the base
flood.
E.
Column foundation design. Masonry piers or poured-in-place concrete
piers shall be internally reinforced to resist vertical and lateral
loads, and be connected with a movement-resisting connection to a
pile cap or pile shaft.
F.
Connectors and fasteners. Galvanized metal connectors, wood connectors,
or bolts of size and number adequate for the calculated loads must
be used to connect adjoining components of a structure. Toe nailing
as a principal method of connection is not permitted. All metal connectors
and fasteners used in exposed locations shall be steel, hot-dipped
galvanized after fabrication. Connectors in protected interior locations
shall be fabricated from galvanized sheet.
G.
Beam-to-pile connections. The primary floor beams or girders shall
span the supports in the direction parallel to the flow of potential
floodwater and wave action and shall be fastened to the columns or
pilings by bolting, with or without cover plates. Concrete members
shall be connected by reinforcement, if cast in place, or (if precast)
shall be securely connected by bolting and welding. If sills, beams,
or girders are attached to wood piling at a notch, a minimum of two
five-eights-inch galvanized steel bolts or two hot-dipped galvanized
straps 3/16 inch by four inches by 18 inches each bolted with two
one-half-inch lag bolts per beam member shall be used. Notching of
pile tops shall be the minimum sufficient to provide ledge support
for beam members without unduly weakening pile connections. Piling
shall not be notched so that the cross section is reduced below 50%.
H.
Floor and deck connections.
(1)
Wood two-inch-by-four-inch (minimum) connectors or metal joist anchors
shall be used to tie floor joists to floor beams/girders. These should
be installed on alternate floor joists, at a minimum. Cross bridging
of all floor joists shall be provided. Such cross bridging may be
one-inch-by-three-inch members, placed eight feet on-center maximum,
or solid bridging of same depth as joist at same spacing.
(2)
Plywood should be used for subflooring and attic flooring to provide
good torsional resistance in the horizontal plane of the structure.
The plywood should not be less than three-fourths-inch total thickness,
and should be exterior grade and fastened to beams or joists with
8d annular or spiral thread galvanized nails. Such fastening shall
be supplemented by the application of waterproof industrial adhesive
applied to all bearing surfaces.
I.
Exterior wall connections. All bottom plates shall have any required
breaks under a wall stud or an anchor bolt. Approved anchors will
be used to secure rasters or joists and top and bottom plates to studs
in exterior and bearing walls to form a continuous tie. Continuous
fifteen-thirty-seconds-inch-or-thicker plywood sheathing-overlapping
the top wall plate and continuing down to the sill, beam, or girder-may
be used to provide the continuous tie. If the sheets of plywood are
not vertically continuous, then two-by-four nailer blocking shall
be provided at all horizontal joints. In lieu of the plywood, galvanized
steel rods of one-half-inch diameter or galvanized steel straps not
less than one-inch wide by one-sixteenth-inch thick may be used to
connect from the top wall plate to the sill, beam, or girder. Washers
with a minimum diameter of three inches shall be used at each end
of the one-half-inch-round rods. These anchors shall be installed
no more than two feet from each corner rod, no more than four feet
on center.
J.
Ceiling joist/rafter connections.
(1)
All ceiling joists or rafters shall be installed in such a manner
that the joists provide a continuous tie across the rafters. Ceiling
joists and rafters shall be securely fastened at their intersections.
A metal or wood connector shall be used at alternate ceiling joist/rafter
connections to the wall top plate.
(2)
Gable roofs shall be additionally stabilized by installing two-by-four-blocking
on two-foot centers between the rafters at each gable end. Blocking
shall be installed a minimum of eight feet toward the house interior
from each gable end.
K.
Projecting members. All cantilevers and other projecting members
must be adequately supported and braced to withstand wind and water
uplift forces. Roof eave overhangs shall be limited to a maximum of
two feet and joist overhangs to a maximum of one foot. Larger overhangs
and porches will be permitted if designed or reviewed and certified
by a registered professional engineer or architect.
L.
Roof sheathing.
(1)
Plywood, or other wood material, when used as roof sheathing, shall
not be less than 15/32 inch in thickness, and shall be of exterior
sheathing grade or equivalent. All attaching devices for sheathing
and roof coverings shall be galvanized or be of other suitable corrosion-resistant
material.
(2)
All corners, gable ends, and roof overhangs exceeding six inches
shall be reinforced by the application of waterproof industrial adhesive
applied to all bearing surfaces of any plywood sheet used in the sheathing
of such corner, gable end, or roof overhang.
(3)
In addition, roofs should be sloped as steeply as practicable to
reduce uplift pressures, and special care should be used in securing
ridges, hips, valleys, eaves, vents, chimneys, and other points of
discontinuity in the roofing surface.
M.
Protection of openings. All exterior glass panels, windows, and doors
shall be designed, detailed, and constructed to withstand loads due
to the design wind speed of 75 mph. Connections for these elements
must be designed to transfer safely the design loads to the supporting
structure. Panel widths of multiple panel sliding glass doors shall
not exceed three feet.
N.
Breakaway wall design standards.
(1)
The breakaway wall shall have a design safe loading resistance of
not less than 10 and not more than 20 pounds per square foot, with
the criterion that the safety of the overall structure at the point
of wall failure be confirmed using established procedures. Grade beams
shall be installed in both directions for all piles considered to
carry the breakaway wall load. Knee braces are required for front
row piles that support breakaway walls.
(2)
Use of breakaway wall strengths in excess of 20 pounds per square
foot shall not be permitted unless a registered professional engineer
or architect has developed or reviewed the structural design and specifications
for the building foundation and breakaway wall components, and certifies
that the breakaway walls will fail under water loads less than those
that would occur during the base flood; and that the elevated portion
of the building and supporting foundation system will 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
(structural and nonstructural). Water-loading values used shall be
those associated with the base flood. Wind-loading values shall be
those required by the building code.
A.
The following standards apply to new and substantially improved commercial, industrial and other nonresidential structures located in areas of special flood hazard, in addition to the requirements in § 133-15, Subsection B, Subdivision proposals, and Subsection C, Encroachments, and § 133-16, Standards for all structures.
(1)
Within Zones A1 through A30, AE and AH, and also Zone A if base flood
elevation data are available, new construction and substantial improvements
of any nonresidential structure, together with attendant utility and
sanitary facilities, shall either:
(a)
Have the lowest floor, including basement or cellar, elevated
to or above two feet above the base flood elevation; or
(b)
Be floodproofed so that the structure is watertight below two
feet above the base flood elevation, including attendant and sanitary
facilities, with walls substantially impermeable to the passage of
water. All structural components located below the base flood elevation
must be capable of resisting hydrostatic and hydrodynamic loads and
the effects of buoyancy.
(2)
Within Zone AO, new construction and substantial improvements of
nonresidential structures shall:
(a)
Have the lowest floor (including basement) elevated above the
highest adjacent grade at least as high the depth number specified
in feet on the community's FIRM plus two feet (at least three feet
if no depth number is specified); or
(b)
Together with attendant utility and sanitary facilities, be completely floodproofed to that level to meet the floodproofing standard specified in § 133-20A(1)(b).
(3)
If the structure is to be floodproofed, a licensed professional engineer or architect shall develop and/or review structural design, specifications, and plans for construction. A floodproofing certificate or other certification shall be provided to the local administrator that certifies the design and methods of construction are in accordance with accepted standards of practice for meeting the provisions of § 133-20A(1)(b), including the specific elevation (in relation to mean sea level) to which the structure is to be floodproofed.
(4)
Within Zones AH and AO, adequate drainage paths are required to guide
floodwaters around and away from proposed structures on slopes.
(5)
Within Zone A, when no base flood elevation data are available, the
lowest floor (including basement) shall be elevated at least three
feet above the highest adjacent grade.
In Zones V1 through V30, VE and also Zone V if base flood elevations
are available, new construction and substantial improvements of any
nonresidential structure, together with attendant utility and sanitary
facilities, shall have the bottom of lowest member of the lowest floor
elevated to or above two feet above the base flood elevation. Floodproofing
of structures is not an allowable alternative to elevating the lowest
floor to two feet above the base flood elevation in Zones V1 through
V30, VE and V.
The following standards in addition to the standards in § 133-15, General standards, and § 133-16, Standards for all structures, apply, as indicated, in areas of special flood hazard to manufactured homes and to recreational vehicles which are located in areas of special flood hazard.
A.
B.
Within Zones A1 through A30, AE, AH, the bottom of the frame of the manufactured home shall be elevated to meet the requirements of § 133-18A(1). Elevation on piers consisting of dry stacked blocks is prohibited.
C.
Within Zone A, the bottom of the frame so the manufactured home shall be elevated to meet the requirements of § 133-18A(2). Elevation on piers consisting of dry stacked blocks is prohibited.
D.
Within Zone AO, the bottom of the frame of the manufactured home shall be elevated to meet the requirements of § 133-18A(3). Elevation on piers consisting of dry stacked blocks is prohibited.
F.
The foundation
and anchorage of manufactured homes to be located in identified floodways
shall be designed and constructed in accordance with ASCE 24.
The following standards apply to new and substantially improved accessory structures, including detached garages, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in § 133-6.
A.
The accessory
structure must meet the definition of structure, for floodplain management
purposes, provided in 44 CFR 59.1, where walled and roofed shall be
interpreted as having two outside rigid walls and a fully secured
roof.
B.
The accessory
structure should be small, as defined by the community and approved
by FEMA, and represent a minimal investment. Accessory structures
of any size may be considered for a variance; however, FEMA considers
accessory structures that meet the following criteria to be small
and therefore not necessarily in need of a variance, if the community
chooses to allow it:
D.
The portions
of the accessory structure located below BFE plus two feet of freeboard
must be constructed with flood-resistant materials.
E.
Mechanical
and utility equipment for the accessory structure must be elevated
or dry floodproofed to or above BFE plus two feet of freeboard.
F.
Within
Zones AO and Zone A, if base flood elevation data are not available,
areas below three feet above the highest adjacent grade shall be constructed
using methods and practices that minimize flood damage.
G.
The accessory
structure must comply with the floodway encroachment provisions of
the NFIP.
H.
The accessory
structure must be wet floodproofed to protect the structure from hydrostatic
pressure. The design must meet the NFIP design and performance standards
for openings per 44 CFR 60.3(c)(5) and must allow for the automatic
entry and exit of floodwaters without manual operation or the presence
of a person (or persons).
I.
Within
Zones V1 through V30, VE, and V, unelevated accessory buildings must
be unfinished inside, constructed with flood-resistant materials,
and used only for storage. When an accessory building is placed in
these zones, the design professional must determine the effect that
debris from the accessory building will have on nearby buildings.
If the accessory building is large enough that its failure could create
damaging debris or divert flood flows, it must be elevated above the
base flood elevation plus two feet.
In order to prevent potential flood damage to certain facilities
that would result in serious danger to life and health, or widespread
social or economic dislocation, no new critical facility shall be
located within any area of special flood hazard, or within any five-hundred-year
flood zone shown as a B Zone or a Shaded X Zone on the Community's
Flood Insurance Rate Maps.
A.
Appeals Board.
(1)
The Zoning Board of Appeals as established by the Common Council
of City of Oswego shall hear and decide appeals and requests for variances
from the requirements of this chapter.
(2)
The Zoning Board of Appeals shall hear and decide appeals when it
is alleged there is an error in any requirement, decision, or determination
made by the local administrator in the enforcement or administration
of this chapter.
(3)
Those aggrieved by the decision of the Zoning Board of Appeals may
appeal such decision to the Supreme Court pursuant to Article 78 of
the Civil Practice Chapter and Rules.
(4)
In passing upon such applications, the Zoning Board of Appeals shall
consider all technical evaluations, all relevant factors, 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 individual owner;
(d)
The importance of the services provided by the proposed facility
to the community;
(e)
The necessity to the facility of a waterfront location, where
applicable;
(f)
The availability of alternative locations for the proposed use
which are not subject to flooding or erosion damage;
(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 of that area;
(i)
The safety of access to the property in times of flood for ordinary
and emergency vehicles;
(j)
The costs to local governments and the dangers associated with
conducting search and rescue operations during periods of flooding;
(k)
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
(l)
The costs of providing governmental services during and after
flood conditions, including search and rescue operations, maintenance
and repair of public utilities and facilities such as sewer, gas,
electrical, and water systems and streets and bridges.
(5)
Upon consideration of the factors of § 133-25A(4) and the purposes of this chapter, the Zoning Board of Appeals may attach such conditions to the granting of variances as it deems necessary to further the purposes of this chapter.
(6)
The local administrator shall maintain the records of all appeal
actions including technical information and report any variances to
the Federal Emergency Management Agency upon request.
B.
Conditions for variances.
(1)
Generally, variances may be issued for new construction and substantial improvements to be erected on a lot of 1/2 acre or less in size contiguous to and surrounded by lots with existing structures constructed below the base flood elevation, providing items in § 133-25A(4)(a) through (l) have been fully considered. As the lot size increases beyond the 1/2 acre, the technical justification required for issuing the variance increases.
(2)
Variances may be issued for the repair or rehabilitation of historic
structures upon determination that:
(3)
Variances may be issued by the Zoning Board of Appeals for new construction
and substantial improvements and for other development necessary for
the conduct of a functionally dependent use provided that:
(4)
Variances shall not be issued within any designated floodway if any
increase in flood levels during the base flood discharge would result.
(5)
Variances shall only be issued upon a determination that the variance
is the minimum necessary, considering the flood hazard, to afford
relief.
(6)
Variances shall only be issued upon receiving written justification
of:
(a)
A showing of good and sufficient cause;
(b)
A determination that failure to grant the variance would result
in exceptional hardship to the applicant; and
(c)
A determination that the granting of a variance will not result
in increased flood heights, additional threats to public safety, extraordinary
public expense, create nuisances, cause fraud on or victimization
of the public or conflict with other existing chapters or ordinances.
(7)
Any applicant to whom a variance is granted for a building with the
lowest floor below the base flood elevation shall be given written
notice over the signature of a community official that:
(a)
The issuance of a variance to construct a structure below the base
flood level will result in increased premium rates for insurance up
to amounts as high as $25 for $100 of insurance coverage; and
(b)
Such construction below the base flood level increases risks to life
and property.
Such notification shall be maintained with the record of all variance actions as required in § 133-14H of this chapter.
This chapter shall take effect immediately upon filing with
the Secretary of State.
