§ 19.6-76

Where the specific one-percent-annual-chance flood elevation cannot be determined for this area using other sources of data, then the applicant for the proposed use, development and/or activity shall determine this base flood elevation.

When such base flood elevation data is utilized, the lowest floor shall be elevated to or above the base flood level plus 18 inches.

Until a regulatory floodway is designated, no new construction, substantial improvements, or other development (including fill) shall be permitted within the areas of special flood hazard, designated as Zones A1-30, AE, or AH 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 foot at any point within Appomattox County.

New construction and substantial improvements shall be built according to this article and the VA USBC, and anchored to prevent flotation, collapse, or lateral movement of the structure.

Adequate drainage paths around structures on slopes shall be provided to guide floodwaters around and away from proposed structures.

All new construction and substantial improvements of non-residential structures shall have the lowest floor elevated to or above the flood depth specified on the FIRM, or be completely floodproofed to the specified flood level.

All new construction and substantial improvements of residential structures shall have the lowest floor, including basement, elevated to or above the flood depth specified on the FIRM, above the highest adjacent grade at least as high as the depth number specified in feet on the FIRM. If no flood depth number is specified, the lowest floor, including basement, shall be elevated no less than two feet above the highest adjacent grade.

The flood-carrying capacity within an altered or relocated portion of any watercourse shall be maintained.

New construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage.

Within any floodway area, no encroachments, including fill, new construction, substantial improvements, or other development shall be permitted unless it has been demonstrated through hydrologic and hydraulic analysis that the proposed encroachment will not result in any increase in flood levels within the community during the occurrence of the base flood discharge.

Manufactured homes shall be anchored to prevent 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.

The placement of manufactured homes (mobile homes) is prohibited, except in an existing manufactured home (mobile home) park or subdivision.

New construction or substantial improvements shall be constructed by methods and practices that minimize flood damage.

If there is any conflict between the provisions or requirements of the Floodplain Districts and those of any underlying district, the more restrictive provisions and/or those pertaining to the floodplain districts shall apply.

New construction or substantial improvement of any commercial, industrial, or non-residential building (or manufactured home) shall have the lowest floor, including basement, elevated to or above the base flood level plus 18 inches.

Non-residential buildings located in all A1-30, AE, and AH zones may be floodproofed in lieu of being elevated, provided that all areas of the building components below the elevation corresponding to the BFE plus two feet are watertight.

All uses, activities, and development occurring within any floodplain district, including placement of manufactured homes, shall be undertaken only upon the issuance of a permit.

A replacement manufactured home may be placed on a lot in an existing manufactured home park or subdivision provided the anchoring, elevation, and encroachment standards are met.

New construction or substantial improvement of any residential structure (including manufactured homes) in Zones A1-30, AE, AH, and A with detailed base flood elevations shall have the lowest floor, including basement, elevated to or above the base flood level plus 18 inches.

New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters.

Electrical, heating, ventilation, plumbing, air-conditioning equipment, and other service facilities, including duct work, shall be designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.

On-site waste disposal systems shall be located and constructed to avoid impairment to them or contamination from them during flooding.

New and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system.

Prior to any proposed alteration or relocation of any channels or of any watercourse, stream, etc., within this jurisdiction a permit shall be obtained from the U.S. Corps of Engineers, the Virginia Department of Environmental Quality, and the Virginia Marine Resources Commission.

The Floodplain Districts described above shall be overlays to the existing underlying districts as shown on the Official Zoning Ordinance Map, and as such, the provisions for the floodplain districts shall serve as a supplement to the underlying district provisions.