ORDINANCE
O-21-058
proposals submitted to the community (i.e., subdivisions, site approvals).
Where a one-hundred-year flood elevation is not available or not known,
the flood elevation shall be determined to be at least 2 feet above the
highest adjacent grade.
(3) In Zone AO, the flood elevation is determined by adding the elevation of
the highest adjacent grade to the depth number specified on the FIRM or,
if no depth number is specified on the FIRM, at least two feet.
B. Criteria. The Administrative Officer's one-hundred-year flood elevation
determination will be used as criteria for requiring in Zones A, AE and AO that:
(1)
(2)
All new construction or substantial improvement of residential structures
have the lowest floor (including basement) elevated at least _1 foot te-er
above the one-hundred-year flood elevation.
That all new construction or substantial improvements of nonresidential
structures have the lowest floor (including basement) elevated at least one
or two feet te-or above the one-hundred-year flood level depending on the
Flood Design Class (one foot for Flood Design Classes 1. 2 and 3 and two
feet_or the 500-year flood elevation, whichever is higher for Flood Design
Class 4) or to the Design Flood Elevation, whichever is higher or, together
with attendant utility and sanitary facilities, shall:
(a) Be floodproofed so that below the one-hundred-year flood
elevation the structure is watertight with walls substantially
impermeable to the passage of water;
(b) Have structural components capable of resisting hydrostatic and
hydrodynamic loads and the effects of buoyancy; and
(c) Be certified by a registered professional engineer or architect that
the design and methods of construction are in accordance with
accepted standards of practice for meeting the provisions of this
section.
All manufactured homes to be placed or substantially improved within
special flood hazard areas shall be elevated on a permanent foundation
such that the lowest floor of the manufactured home is at least 1 foot ater
above the base flood level; and be securely anchored to resist floatation,
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.
