Herndon, Virginia · General provision

Sec. 78-60.2

Dimensional standards

Servicing

Geographic extent
All lands within the town identified as flood-prone, including zones A1-A30, AE, A, AO, AH on the FIRM

Uses

Extracted standards

6 individual requirements pulled out of this section’s prose, each with the sentence it came from.

Floodplain

  • Manufactured homes shall be prohibited in accordance with the regulations of this chapter.

  • Minimum lowest floor elevation for nonresidential structures1.5 ft

    New construction and substantial improvements of nonresidential structures within zones A1—30, AE and AH zones on the flood insurance rate map shall have the lowest floor (including basement) elevated no lower than 18 inches above the base flood level or, together with attendant utility and sanitary facilities, be designed so that below the base flood level plus one foot the structure is watertight...

  • Minimum lowest floor elevation for residential structures1.5 ft

    New construction and substantial improvements of residential structures within zones A1—30, AE and AH zones on the flood insurance rate map shall have the lowest floor (including basement) elevated no lower than 18 inches above the base flood level.

  • No increase in 100-year flood elevation

    No new construction, or development shall be permitted within the floodplain overlay district unless it is demonstrated that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, does not increase the elevation of the 100-year flood at any one point.

  • Minimum elevation for shallow flooding areas2 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.

  • Special exception required for all development

    Uses, activities, and development occurring within the FPO shall be undertaken only upon the issuance of approval of a site plan and special exception pursuant to this chapter.

From the ordinance

The FPO shall include all lands subject to inundation by waters of the 100-year flood.
Sec. 78-60.2