Sec. 106-353

Other

• Anchoring to prevent flotation, collapse, or lateral movement

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

• Base flood elevation data for large subdivisions50 lots

  Base flood elevation data shall be obtained from other sources or developed using detailed methodologies comparable to those contained in a FIS 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.

• Breakaway wall design safe loading resistance20 psf

  a breakaway wall shall have a design safe loading resistance of not less than ten and no more than 20 pounds per square foot.

• FillGrading (cut & fill)Reshaping land by removing earth (cut) or adding it (fill), often capped by volume. for structural support prohibitedProhibitedNot allowed in the district at all, short of rezoning or a variance.

  The use of fill for structural support of buildings is prohibited.

• Flood carrying capacity maintained

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

• Lowest floor elevation above base flood elevation2 ft

  When such base flood elevation data is utilized, the lowest floor shall be elevated to two feet above the base flood level.

• Lowest floor elevation above base flood elevation2 ft

  When such base flood elevation data is utilized, the lowest floor shall be elevated two feet above the base flood level.

• Lowest floor elevation above highest adjacent grade2 ft

  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.

• Bottom of lowest horizontal structural member elevation above base flood level2 ft

  The bottom of the lowest horizontal structural member of the lowest floor (excluding the pilings or columns) is elevated to two feet above the base flood level if the lowest horizontal structural member is parallel to the direction of wave approach

• Bottom of lowest horizontal structural member elevation above base flood level2 ft

  or elevated at least two feet above the base flood level if the lowest horizontal structural member is perpendicular to the direction of wave approach

• Manufactured homeManufactured homeA dwelling built in a factory to a federal standard and transported to the site. anchoring

  Manufactured homes shall be anchored to prevent flotation, collapse, or lateral movement.

• Materials resistant to flood damage

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

• Construction methods minimize flood damage

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

• New construction landward of mean high tide

  All new construction shall be located landward of the reach of mean high tide.

• No increase in water surface elevation more than one foot1 ft

  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 and 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 the county.

• Oil and propane tank anchoring3 ft

  All new, replaced, or existing oil, and propane tanks must be anchored against flotation, collapse and lateral movement under flood conditions by means of an approved anchorage system or shall be installed a minimum of three feet above base flood elevation

• Manmade alteration of sand dunes prohibitedProhibitedNot allowed in the district at all, short of rezoning or a variance.

  The manmade alteration of sand dunes, which would increase potential flood damage, is prohibited.

• Sanitary sewage system design

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

• Service equipment elevation above base flood elevation2 ft

  Electrical, heating, ventilation, plumbing and air conditioning and other service equipment shall be elevated to a minimum of two feet above the base flood elevation.

• Service facilities designed 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.

• Space below lowest floor use

  The enclosed space below the lowest floor shall be used solely for parking of vehicles, building access, or storage. Such space shall not be partitioned into multiple rooms, temperature-controlled, or used for human habitation.

• On-site waste disposal system location

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

• Water supply system design

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

• Permit 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