Sec. 120.1-127.1, 120.1-128, 120.1-128.1, 120.1-129, 120.1-130, 120.1-131

Any alteration, repair, reconstruction or improvements to a building that is in compliance with the provisions of this ordinance shall meet the requirements of 'new construction' as contained in this division.

Any alteration, repair, reconstruction or improvements to a building that is not in compliance with the provisions of this division, shall be undertaken only if said nonconformity is not furthered, extended, or replaced.

New construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure.

Existing structures in the floodway area shall not be expanded or enlarged unless it has been demonstrated that the proposed expansion would not result in any increase in the base flood elevation. Any modification, alteration, repair, reconstruction, or improvement of any kind to a structure and/or use located in any flood plain areas to an extent or amount of less than 50 percent of its market value shall conform to the VA USBC. The modification, alteration, repair, reconstruction, or improvement of any kind to a structure and/or use, regardless of its location in a floodplain area to an extent or amount of 50 percent or more of its market value shall be undertaken only in full compliance with this ordinance and shall require the entire structure to conform to the VA USBC.

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

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

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

In zones A, AE, AH, and AO, all manufactured homes placed, or substantially improved, on individual lots or parcels, must meet all the requirements for new construction, including the elevation and anchoring requirements in section 120.1-128.1.

Nonresidential 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 water tight...

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

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

Recreational vehicles placed on sites shall either be on the site for fewer than 180 consecutive days and be fully licensed and ready for highway use, or meet all the requirements for manufactured homes.

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.

All applications for development in the floodplain districts and all building permits issued in the floodplain shall incorporate: Elevation of Lowest Floor, Floodproofing Elevation, Base Flood Elevation, Topographic Information.

Enclosed areas below the lowest floor shall not be designed or used for human habitation, but shall only be used for parking of vehicles, building access, or limited storage... Include measures to automatically equalize hydrostatic flood forces on walls by allowing for the entry and exit of floodwaters. Provide a minimum of two openings on different sides of each enclosed area subject to flooding. The total net area of all openings must be at least one square inch for each square foot of enclosed area subject to flooding. The bottom of all required openings shall be no higher than one foot above the adjacent grade.

All subdivision proposals shall be consistent with the need to minimize flood damage; have public utilities and facilities located and constructed to minimize flood damage; have adequate drainage provided; and base flood elevation data shall be provided for subdivision proposals exceeding 50 lots or five acres.

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

Variances shall be issued only upon a showing of good and sufficient cause; after the board of zoning appeals has determined that failure to grant the variance would result in exceptional hardship; and that the granting of such variance will not result in unacceptable or prohibited increases in flood heights, additional threats to public safety, extraordinary public expense, create nuisances, cause fraud or victimization of the public, or conflict with local laws or ordinances. Variances generally limited to lots less than one-half acre.

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., a permit shall be obtained from the U.S. Corps of Engineers, the Virginia Department of Environmental Quality, and the Virginia Marine Resources Commission.

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

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. If there is any conflict, the more restrictive provisions shall apply.