675 IAC 14-4.4-32 Section R322.1.4.1; determination of design flood elevations

Sec. 32. Change the text of SECTION R322.1.4.1 to read as follows: If base flood elevations are not available from a FEMA Flood Insurance Study (FIS) and corresponding Flood Insurance Rate Map (FIRM) or Flood Boundary Floodway Map (FBFM) for a site in order to determine the flood elevation, the design flood elevation may be determined by either of the following: 1. Data obtained from a federal or state source. 2. Determine the design flood elevation in accordance with accepted hydrologic and hydraulic engineering practices used to define special flood hazard areas if the upstream drainage area is less than one square mile. Determinations shall be undertaken by a registered design professional who shall document that the technical methods used reflect currently accepted engineering practice. Studies, analyses, and computations shall be submitted in sufficient detail to allow thorough review and approval.