[R.O. 1994 § 415.150; Ord. No.
2009-19S, 5-12-2009]
A. No permit for floodplain development shall be granted for new construction,
substantial improvements and other improvements, including the placement
of manufactured homes, within any unnumbered or numbered A Zones and
AE Zones, unless the conditions of this Section are satisfied.
B. All areas identified as unnumbered A Zones on the FIRM are subject
to inundation of the one-hundred-year flood; however, the base flood
elevation is not provided. Development within unnumbered A Zones is
subject to all provisions of this Chapter. If Flood Insurance Study
data is not available, the community shall obtain, review and reasonably
utilize any base flood elevation or floodway data currently available
from Federal, State or other sources.
C. Until a floodway is designated, no new construction, substantial
improvements or other development, including fill, shall be permitted
within any numbered A Zone or AE Zone on the FIRM, 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 (1) foot
at any point within the community.
D. All new construction, subdivision proposals, substantial improvements,
prefabricated structures, placement of manufactured homes and other
developments shall require:
1.
Design or adequate anchorage to prevent flotation, collapse
or lateral movement of the structure resulting from hydrodynamic and
hydrostatic loads, including the effects of buoyancy;
2.
Construction with materials resistant to flood damage;
3.
Utilization of methods and practices that minimize flood damages;
4.
All electrical, heating, ventilation, plumbing, air-conditioning
equipment and other service facilities be designed and/or located
so as to prevent water from entering or accumulating within the components
during conditions of flooding;
5.
New or replacement water supply systems and/or sanitary sewage
systems be designed to minimize or eliminate infiltration of floodwaters
into the systems and discharges from the systems into floodwaters
and on-site waste disposal systems be located so as to avoid impairment
or contamination; and
6.
Subdivision proposals and other proposed new development, including
manufactured home parks or subdivisions, located within special flood
hazard areas are required to assure that:
a.
All such proposals are consistent with the need to minimize
flood damage;
b.
All public utilities and facilities, such as sewer, gas, electrical
and water systems, are located and constructed to minimize or eliminate
flood damage;
c.
Adequate drainage is provided so as to reduce exposure to flood
hazards; and
d.
All proposals for development, including proposals for manufactured
home parks and subdivisions, greater than five (5) acres or fifty
(50) lots, whichever is lesser, include within such proposals base
flood elevation data.
E. Storage, Material And Equipment.
1.
The storage or processing of materials within the special flood
hazard area that are in time of flooding buoyant, flammable, explosive
or could be injurious to human, animal or plant life is prohibited.
2.
Storage of other material or equipment may be allowed if not
subject to major damage by floods, if firmly anchored to prevent flotation
or if readily removable from the area within the time available after
a flood warning.
F. Accessory Structures. Structures used solely for parking and limited
storage purposes, not attached to any other structure on the site,
of limited investment value and not larger than four hundred (400)
square feet may be constructed at-grade and wet floodproofed provided
there is no human habitation or occupancy of the structure; the structure
is of single-wall design; a variance has been granted from the standard
floodplain management requirements of this Chapter; and a floodplain
development permit has been issued.
[R.O. 1994 § 415.160; Ord. No.
2009-19S, 5-12-2009]
A. In all areas identified as unnumbered and numbered A Zones and AE Zones, where base flood elevation data have been provided as set forth in Article
IV, Section
415.150, the following provisions are required:
1.
Residential Construction. New construction or substantial improvement
of any residential structures, including manufactured homes, shall
have the lowest floor, including basement, elevated to one (1) foot
above base flood level.
2.
Non-Residential Construction. New construction or substantial improvement of any commercial, industrial or other non-residential structures, including manufactured homes, shall have the lowest floor, including basement, elevated to one (1) foot above the base flood level or, together with attendant utility and sanitary facilities, be floodproofed so that below the base flood elevation the structure is water-tight 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. A registered professional engineer or architect shall certify that the standards of this Subsection are satisfied. Such certification shall be provided to the Floodplain Administrator as set forth in Article
III, Section
415.130(A)(9).
3.
Require, for all new construction and substantial improvements,
that fully enclosed areas below lowest floor used solely for parking
of vehicles, building access or storage in an area other than a basement
and that are subject to flooding shall be 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 registered professional engineer or
architect or meet or exceed the following minimum criteria:
a.
A minimum of two (2) openings having a total net area of not
less than one (1) square inch for every square foot of enclosed area
subject to flooding shall be provided; and
b.
The bottom of all opening shall be no higher than one (1) foot
above grade. Openings may be equipped with screens, louvers, valves
or other coverings or devices provided that they permit the automatic
entry and exit of floodwaters.
[R.O. 1994 § 415.170; Ord. No.
2009-19S, 5-12-2009]
A. All manufactured homes to be placed within all unnumbered and numbered
A Zones and AE Zones on the community's FIRM shall be required
to be installed using methods and practices that minimize flood damage.
For the purposes of this requirement, manufactured homes must be elevated
and anchored to resist flotation, collapse or lateral movement. Methods
of anchoring may include, but are not limited to, use of over-the-top
or frame ties to ground anchors.
B. Require manufactured homes that are placed or substantially improved
within unnumbered or numbered A Zones and AE Zones on the community's
FIRM on sites: outside of a manufactured home park or subdivision;
in a new manufactured home park or subdivision; in an expansion to
an existing manufactured home park or subdivision; or in an existing
manufactured home park or subdivision on which a manufactured home
has incurred substantial damage as the result of a flood, be elevated
on a permanent foundation such that the lowest floor of the manufactured
home is elevated to one (1) foot above the base flood elevation and
be securely attached to an adequately anchored foundation system to
resist flotation, collapse and lateral movement.
C. Require that manufactured homes to be placed or substantially improved on sites in an existing manufactured home park or subdivision within all unnumbered and numbered A Zones and AE Zones on the community's FIRM, that are not subject to the provisions of Article
IV, Section
415.170 of this Chapter, be elevated so that either:
1.
The lowest floor of the manufactured home is at one (1) foot
above the base flood elevation; or
2.
The manufactured home chassis is supported by reinforced piers
or other foundation elements of at least equivalent strength that
are no less than thirty-six (36) inches in height above grade and
be securely attached to an adequately anchored foundation system to
resist flotation, collapse and lateral movement.
[R.O. 1994 § 415.171; Ord. No.
2009-19S, 5-12-2009]
A. If the City determines there are areas of special flood hazard that
may be defined as floodway, through the use of base flood elevation
and floodway data available from a Federal, State or other source,
including data developed pursuant to this Chapter, and determines
this data is suitable as criteria for requiring that new construction,
substantial improvements or other development in Zone A, the City
must meet the standards below:
1.
Adopt a regulatory floodway based on the principle that the
area chosen for the regulatory floodway must be designed to carry
the waters of the base flood without increasing the water surface
elevation of the flood more than one (1) foot at any point.
2.
Encroachments, including fill, new construction, substantial
improvements and other development, shall be prohibited within the
adopted regulatory floodway unless it has been demonstrated through
hydrologic and hydraulic analyses performed in accordance with standard
engineering practice that the proposed encroachment would not result
in any increase in flood levels within the City during the occurrence
of the base flood discharge.
[R.O. 1994 § 415.180; Ord. No.
2009-19S, 5-12-2009]
A. All recreational vehicles placed on sites within all unnumbered and
numbered A Zones and AE Zones on the community's FIRM shall either:
1.
Be on the site for fewer than one hundred eighty (180) consecutive
days; or
2.
Be fully licensed and ready for highway use; or
3.
Meet the permitting, elevation and anchoring requirements for
manufactured homes of this Chapter.
B. For the purposes of this Section, a recreational vehicle is ready
for highway use if it is on its wheels or jacking system, is attached
to the site only by quick-disconnect type utilities and security devices
and has no permanently attached additions.