The general requirements of this section apply to all development proposed within special flood hazard areas identified in § 109-4.
A.
All subdivision and development proposals shall be consistent with
the need to minimize flood damage and are subject to all applicable
standards in these regulations.
B.
All subdivision and development proposals shall have utilities and
facilities, such as sewer, gas, electrical, and water systems, located
and constructed to minimize flood damage.
C.
All subdivision and development proposals shall have adequate drainage
provided to reduce exposure to flood damage.
D.
All subdivision proposals and development proposals containing at
least 50 lots or at least five acres, whichever is the lesser, in
FEMA-delineated special flood hazard areas where base flood elevation
data are not available, shall be supported by hydrologic and hydraulic
engineering analyses that determine base flood elevations and floodway
delineations. The analyses shall be prepared by a licensed professional
engineer in a format required by FEMA for a conditional letter of
map revision or letter of map revision. Submittal requirements and
processing fees shall be the responsibility of the applicant.
A.
New and replacement water supply systems shall be designed to minimize
or eliminate infiltration of floodwaters into the systems.
B.
New and replacement sanitary sewage systems shall be designed to
minimize or eliminate infiltration of floodwaters into systems and
discharges from systems into floodwaters.
C.
On-site waste disposal systems shall be located to avoid impairment
to or contamination from them during conditions of flooding.
All new construction of buildings and structures, including
placement of manufactured homes and substantial improvements to existing
buildings and structures, that are to be located, in whole or in part,
in special flood hazard areas shall comply with flood load and flood-resistant-construction
requirements of the Building Code.
A.
Disposal of fill, including, but not limited to, rubble, construction
debris, woody debris, and trash, shall not be permitted in special
flood hazard areas.
B.
Where permitted by the Building Code (Zones A, AE, and AO), fill
placed for the purpose of raising the ground level and to support
a building or structure shall meet the following requirements:
(1)
Extend laterally from the building footprint to provide for adequate
access, as a function of use; the floodplain administrator may seek
advice from the State Fire Marshal's office and/or the local
fire services agency.
(2)
Placed and compacted to provide for stability under conditions of
rising and falling floodwaters and resistance to erosion, scour, and
settling.
(3)
Consist of soil or rock materials only.
(4)
Sloped no steeper than one vertical on two horizontal, unless approved
by the floodplain administrator.
(5)
Designed with provisions for adequate drainage and no adverse effect
on adjacent properties.
C.
Fill placed for a purpose other than to support a building or structure shall meet the requirements of §§ 109-22B(2) through B(5).
As specified by the Building Code, repair, alteration, or rehabilitation of historic structures shall be subject to the requirements of the Building Code unless a determination is made that compliance will preclude a structure's continued designation as an historic structure and a variance is granted in accordance with Article VI of this chapter and such variance is the minimum necessary to preserve the historic character and design of the structure.
A.
Recreational vehicles in special flood hazard areas shall be fully
licensed and ready for highway use and shall be placed on a site for
less than 180 consecutive days.
A.
Underground tanks in special flood hazard areas shall be anchored
to prevent flotation, collapse or lateral movement resulting from
hydrostatic loads, including the effects of buoyancy, during conditions
of the base flood.
B.
Aboveground tanks in special flood hazard areas shall be elevated
and anchored to or above the base flood elevation plus 12 inches or
shall be anchored at grade and designed and constructed to prevent
flotation, collapse, or lateral movement resulting from hydrodynamic
and hydrostatic loads, including the effects of buoyancy, during conditions
of the base flood.
C.
In special flood hazard areas, tank inlets, fill openings, outlets
and vents shall be:
(1)
At or above the base flood elevation or fitted with covers designed
to prevent the inflow of floodwater or outflow of the contents of
the tanks during conditions of the base flood.
(2)
Anchored to prevent lateral movement resulting from hydrodynamic
and hydrostatic loads, including the effects of buoyancy, during conditions
of the base flood.
A.
Elevation. All new and replacement manufactured homes to be placed
or substantially improved in a flood hazard area shall be elevated
such that the bottom of the lowest horizontal structural supporting
member of the lowest floor of the manufactured home is elevated to
or above the base flood elevation plus 12 inches.
B.
Foundations. All new and replacement manufactured homes, including
substantial improvement of existing manufactured homes, shall be placed
on permanent, reinforced foundations that are designed in accordance
with Section R322 of the Residential Code based on the applicable
flood zone identified on the FIRM.
C.
Anchoring. All new and replacement manufactured homes to be placed
or substantially improved in a special flood hazard area shall be
installed using methods and practices which minimize flood damage.
Manufactured homes shall be securely anchored to an adequately anchored
foundation system to resist flotation, collapse and lateral movement.
The anchor and tie-down specifications of the manufacturer are permitted,
provided such specifications are specific to installation in special
flood hazard areas. This requirement is in addition to applicable
state and local anchoring requirements for resisting wind forces.
D.
Enclosures. Fully enclosed areas below elevated manufactured homes
shall comply with the requirements of Section R322 of the Residential
Code based on the applicable flood zone identified on the FIRM.
E.
Protection of mechanical equipment and outside appliances. Mechanical
equipment and outside appliances shall comply with the requirements
of Section R322 for protection of mechanical and electrical systems.
