[R.O. 2016 § 415.150; Ord. No. 175-98 § 1, 1-13-1998]
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 numbered or unnumbered 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 100-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.
Designed 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 flood waters, and on-site waste disposal systems be located
so as to avoid impairment or contamination; and
6.
Subdivision proposals and other 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, of five (5)
acres or fifty (50) lots, whichever is less, 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. 2016 § 415.160; Ord. No. 175-98 § 1, 1-13-1998]
A.
In all areas identified as numbered and unnumbered A Zones and AE Zones, where base flood elevation data has been provided, as set forth in Article IV, Section 415.150(B), 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 elevation.
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 elevation or, together with attendant utility and sanitary facilities, be floodproofed so that below the base flood elevation the structure 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. 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 the
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 openings 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. 2016 § 415.170; Ord. No. 175-98 § 1, 1-13-1998]
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 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
the 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(B) of this Chapter, be elevated so that either:
1.
The lowest floor of the manufactured
home is one (1) foot above the base flood level; 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. 2016 § 415.180; Ord. No. 175-98 § 1, 1-13-1998]
A.
Located within areas of special flood hazard established in Article II are areas designated as floodways. Since the floodway is an extremely hazardous area due to the velocity of floodwaters that carry debris and potential projectiles, the following provisions shall apply:
1.
The community shall select and 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.
The community shall prohibit any
encroachments, including fill, new construction, substantial improvements,
and other developments 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 community during the occurrence of the base flood discharge.
4.
In unnumbered A Zones, the community shall obtain, review, and reasonably utilize any base flood elevation or floodway data currently available through Federal, State, or other sources as set forth in Article IV, Section 415.150(B).
[R.O. 2016 § 415.190; Ord. No. 175-98 § 1, 1-13-1998]
A.
Require that recreational vehicles placed
on sites within all unnumbered and numbered A Zones and AE Zones on
the community's FIRM either:
1.
Be on the site for fewer than one
hundred eighty (180) consecutive days, and be fully licensed and ready
for highway use*; or
2.
Meet the permitting, elevating and
the anchoring requirements for manufactured homes of this Chapter.
*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.
