A.
In
all areas of special flood hazards (Zones A, AE, A1-30, AO, AH) the
following provisions are required:
1.
All new construction including manufactured homes and substantial
improvements shall be designed (or modified) and adequately anchored
to prevent flotation, collapse, or lateral movement of the structure
resulting from hydrodynamic and hydrostatic loads, including the effects
of buoyancy.
2.
All new construction and substantial improvements shall be constructed
with materials resistant to flood damage.
3.
All new construction and substantial improvements shall be constructed
by methods and practices that minimize flood damage.
4.
All new construction and substantial improvements shall be constructed
with electrical, heating, ventilation, plumbing, and/or located so
as to prevent water from entering or accumulating within the components
during conditions of flooding.
5.
All new and replacement water supply systems shall be designed to
minimize or eliminate infiltration of flood waters into the system.
6.
New and replacement sanitary sewage systems shall be designed to
minimize or eliminate infiltration of flood waters into the systems
and discharges from the system into flood waters.
7.
On-site waste disposal systems shall be located to avoid impairment
to them or contamination from them during flooding.
8.
The storage or processing of materials that are in time of flooding
buoyant, flammable, explosive, or could be injurious to human, animal
or plant life is prohibited.
9.
Storage of other material or equipment may be allowed if not subject
to major damage by floods and firmly anchored to prevent flotation
or if readily removable from the area within the time available after
flood warning.
10.
That until a floodway has been designated, no development, including landfill, may be permitted within Zones A1-30 and AE on the City's FIRM unless the applicant for the land use has demonstrated that the proposed use, when combined with all other existing and reasonably anticipated uses, will not increase the water surface elevations of the one hundred (100) year flood more than one (1) foot on the average cross-section of the reach in which the development or landfill is located as shown on the Flood Insurance Rate Study incorporated by reference; Article III, Section 415.060 of this Chapter.
A.
All
subdivision proposals and other proposed new developments, including
manufactured home parks or subdivisions, shall be consistent with
the need to minimize flood damage.
B.
All
subdivision proposals shall have public utilities and facilities such
as sewer, gas, electrical and water systems located and constructed
to minimize flood damage.
C.
All
subdivision proposals shall have adequate drainage provided to reduce
exposure to flood hazards.
D.
Base
flood elevation data shall be provided for subdivision proposals and
other proposed development (including proposals for manufactured home
parks and subdivisions), which is greater than either fifty (50) lots
or five (5) acres.
A.
In all areas of special flood hazards where base flood elevation data has been provided as set forth in Article III, Section 415.060 or Article IV, Section 415.130 (Zones A1-30, AE and AH) the following provisions are required:
1.
Residential construction. New construction or substantial
improvement of any residential structure shall have the lowest floor,
including basement, elevated to one (1) foot above the base flood
elevation.
2.
Non-residential construction. New construction or substantial improvement or any commercial, industrial or other non-residential structure shall either have the lowest floor, including basement, elevated to one (1) foot above the level of the base flood elevation or, together with attendant utility and sanitary facilities, be floodproofed so that below such a level 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 Official as set forth in Article IV, Section 415.130.
3.
Require for all new construction and substantial improvements. That 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 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 minimum of two (2) openings having a total net area of not less
than one (1) square inch of every square foot of enclosed area subject
to flooding shall be provided. 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.
4.
Manufactured homes.
a.
All manufactured homes shall be anchored to resist flotation, collapse,
or lateral movement. Manufactured homes must be anchored in accordance
with State and local building codes and FEMA guidelines. In the event
that over-the-top frame ties to ground anchors are used, the following
specific requirements (or their equivalent) shall be met:
1)
Over-the-top ties be provided at each of the four (4) corners of
the manufactured home, with two (2) additional ties per side at intermediate
locations and manufactured homes less than fifty (50) feet long requiring
one (1) additional tie per side;
2)
Frame ties be provided at each corner of the home with five (5) additional
ties per side at intermediate points and manufactured homes less than
fifty (50) feet long requiring four (4) additional ties per side;
3)
All components of the anchoring system be capable of carrying a force
of four thousand eight hundred (4,800) pounds; and
4)
Any additions to the manufactured home be similarly anchored.
b.
Require that all manufactured homes to be placed within Zones A1-30, AH, and AE on the community's FIRM, be elevated on a permanent foundation such that the lowest floor of the manufactured home is one (1) foot above the base flood elevations; and be securely anchored to an adequately anchored foundation system in accordance with the provisions of Subsection 4(a) hereof.
A.
Located within the areas of special flood hazard established in Article III, Section 415.060 are areas designated as shallow flooding. These areas have special flood hazards associated with base flood depths of one (1) to three (3) feet where a clearly defined channel does not exist and where the path of flooding is unpredictable and indeterminate; therefore, the following provisions apply:
1.
Within AO zones.
a.
All new construction and substantial improvements of residential
structures have the lowest floor (including basement) elevated above
the highest adjacent grade at least as high as one (1) foot above
the depth number specified in feet on the community's FIRM (at least
two (2) feet if no depth number is specified).
b.
All new construction and substantial improvements of non-residential
structures shall:
1)
Have the lowest floor (including basement) elevated above the highest
adjacent grade at least as high as one (1) foot above the depth number
specified in feet on the community's FIRM (at least two (2) feet if
no depth number is specified), or
2)
Together with attendant utility and sanitary facilities be completely
floodproofed to or above that level so that any space below that level
is watertight with walls substantially impermeable to the passage
of water and with structural components having the capability of resisting
hydrostatic and hydrodynamic loads and effects of buoyancy.
c.
Adequate drainage paths around structures on slopes shall be required
in order to guide floodwaters around and away from proposed structures.
2.
Within AH zones.
a.
The specific standards for all areas of special flood hazard where base flood elevation data has been provided shall be required as set forth in Section 415.170.
b.
Adequate drainage paths around structures on slopes shall be required
in order to guide floodwaters around and away from proposed structures.
