D.C. Mun. Regs. r. 12-A1612
Strike Section 1612.3 of the International Building Code in its entirety and insert new Section 1612.3 in its place in the Building Code to read as follows:
Establishment of flood hazard areas.Flood hazard areas are established by the Floodplain Administrator pursuant to 20 DCMR, Chapter 31.
Design flood elevations. Where design flood elevations are not included in the flood hazard areas established in 20 DCMR, Chapter 31, or where floodways are not designated, the owner and/or the owner's registered design professional shall provide a design floodway analysis and a floodplain analysis to develop design flood elevations. These analyses will be referred to the Floodplain Administrator for review and approval.
Determination of impacts. In riverine flood hazard areas where design flood elevations are specified but floodways have not been designated, the permit applicant shall provide a floodway analysis that demonstrates that the proposed work will not increase the design flood elevation more than 1 foot (305 mm) at any point within the District of Columbia. This analysis shall be referred to the Floodplain Administrator for review and approval.
Insert a new Section 1612.4.1 in the Building Code to read as follows:
Minimum Elevation. Minimum elevation of the top of lowest floor and floodproofing of all classes of buildings and structures shall be 2 feet above the Base Flood Elevation, or 500-year flood elevation, whichever is higher.
Insert a new Section 1612.4.2 in the Building Code to read as follows:
ASCE 24-14. Table 2- 1 and Table 6- 1 of ASCE 24-14 do not apply in the District of Columbia.
D.C. Mun. Regs. r. 12-A1612