Sec. 14.1-4-1, 14.1-4-2, 14.1-4-3, 14.1-4-4, 14.1-5

Other

• AccessoryAccessory useA secondary activity customarily incidental to the main use of the lot — a garage, a home office. structures limited to 600 sq ftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.600 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Accessory structures in the SFHA shall comply with the elevation requirements ... or, if not elevated or dry floodproofed, shall: ... Be limited to no more than 600 square feet in total floor area; ... Be useable only for parking of vehicles or limited storage; ...

• Anchoring to prevent flotation

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

• Existing structures must be brought into conformity when changed

  Any structure or use of a structure or premises must be brought into conformity with these provisions when it is changed, repaired, or improved unless one of the following exceptions is established before the change is made.

• Flood carrying capacity maintained

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

• Flood damage-resistant materials

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

• Manufactured homesManufactured homeA dwelling built in a factory to a federal standard and transported to the site. must meet elevation and anchoring

  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.

• Non-residential elevated or floodproofed to BFE + 1 foot1 ft

  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 one foot. Non-residential buildings may be floodproofed in lieu of being elevated.

• Permit required for all development in floodplainFloodplainLand expected to flood at a stated frequency, where building carries extra conditions.

  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.

• Recreational vehicles must be on site <180 days or meet manufactured homeManufactured homeA dwelling built in a factory to a federal standard and transported to the site. requirements180 days

  All recreational vehicles placed on sites must either: a. Be on the site for fewer than 180 consecutive days, be fully licensed and ready for highway use ...; or b. Meet all the requirements for manufactured homes.

• Residential lowest floor elevated to BFE + 1 foot1 ft

  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 one foot.

• Sanitary sewage systems designed to minimize infiltration

  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.

• Space below lowest floor restrictions

  Fully enclosed areas below the regulatory flood protection elevation shall not be designed or used for human habitation, but shall be used solely for parking of vehicles, building access, or limited storage of maintenance equipment. ... Include measures to automatically equalize hydrostatic flood forces on walls by allowing for the entry and exit of floodwaters.

• Base flood elevation data required for subdivisions >50 lots or 5 acresacre43,560 square feet — about the size of an American football field without the end zones.50 lots

  Base flood elevation data shall be obtained from other sources or developed using detailed methodologies ... for subdivision proposals and other proposed development proposals (including manufactured home parks and subdivisions) that exceed 50 lots or five acres, whichever is the lesser.

• Subdivision proposals must minimize flood damage

  All subdivision proposals shall be consistent with the need to minimize flood damage; ... shall have public utilities and facilities ... located and constructed to minimize flood damage; ... shall have adequate drainage provided to reduce exposure to flood hazards.

• Utilities elevated to prevent water entry

  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 located to avoid impairment

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

• Water supply systems designed to minimize infiltration

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

• Permit required for watercourse alteration

  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.