[Ord. No. 262 Art.
IV §A, 12-27-2004]
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 A 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. All new construction, subdivision proposals, substantial improvements,
prefabricated buildings, 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; methods and practices.[Ord. No. 328, 12-12-2016]
a.
Construction with materials resistant to flood damage;
b.
Utilization of methods and practices that minimize flood damages;
3.
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;
4.
New or replacement water supply systems and/or sanitary sewage
systems be designed to minimize or eliminate infiltration of flood
waters 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
5.
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, of 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 Structure. 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-flood-proofed, 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 used.
[Ord. No. 262 Art.
IV §B, 12-27-2004]
A. In all areas of special flood hazard, once base flood elevation data is obtained, as set forth in Article
IV, Section
410.140(B), the following provisions are required:
1.
Residential Construction. New construction
or substantial improvement of any residential structure, including
manufactured homes, shall have the lowest floor, including basement,
elevated to at least one (1) foot above base flood level.
2.
Non-Residential Construction. New construction or substantial improvement of any commercial, industrial, or other non-residential structure, including manufactured homes, shall have the lowest floor, including basement, elevated to or one (1) foot above the base flood level or, together with attendant utility and sanitary facilities, be floodproofed so that below the base flood level, the structure is watertight with walls substantially impermeable to the passage of water and with structural components having a 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
410.120(G)(3).
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 may 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.
c.
Openings may be equipped with screens, louvers, valves, or other
coverings or devices, provided that they permit the automatic entry
and exit of floodwaters.
B. In all areas of special flood hazard, once floodway data is obtained, as set forth in Article
IV, Section
410.140(B), the following provisions are required:
1.
The designated floodway shall be based on the standard that
the area chosen for the floodway must be designed to carry the waters
of the base flood, without increasing the water surface elevation
more than one (1) foot at any point; and
2.
The community shall prohibit any encroachments, including fill,
new construction, substantial improvements, and other development
with the designated 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.
[Ord. No. 262 Art.
IV §C, 12-27-2004]
A. All manufactured homes to be placed within special flood hazard areas
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 A zones on the community's FIRM on sites:
1.
Outside of manufactured home park or subdivision;
2.
In a new manufactured home park or subdivision;
3.
In an expansion to and existing manufactured home park or subdivision;
or
4.
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 level 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 unnumbered A zones on the community's FIRM, that are not subject to the provisions of Subsection
(B), be elevated so that either:
1.
The lowest floor of the manufactured home is at 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.
[Ord. No. 262 Art.
IV §D, 12-27-2004]
A. Require that recreational vehicles placed on sites within unnumbered
A zones on the community's FHBM or FIRM either:
1.
Be on the site for fewer than 180 consecutive days;
2.
Be fully licensed and ready for highway use; or
3.
Meet the permitting, elevation, and the anchoring requirements
for manufactured homes of this Chapter.