This chapter's protection standard is the regulatory flood. The best available regulatory flood data is listed below.
(A) The regulatory flood elevation, floodway, and fringe limits of the SFHAs within the extraterritorial jurisdiction of the City of Washington, or that may be annexed into the city, delineated as Zone A on the Daviess County Indiana Uninc. Areas Flood Hazard Boundary Map, prepared by the Federal Emergency Management Agency and dated May 5, 1978, shall be according to the best data available as provided by the Indiana Department of Natural Resources, provided the upstream drainage area from the subject site is greater than one square mile.
(B) In the absence of a published FEMA map, or absence of identification on a FEMA map, the regulatory flood elevation, floodway, and fringe limits of any watercourse in the community's known flood-prone areas shall be according to the best data available as provided by the Indiana Department of Natural Resources, provided the upstream drainage area from the subject site is greater than one square mile.
(C) Upon issuance of a Letter of Final Determination (LFD), any more restrictive data in the new (not yet effective) mapping/study shall be utilized for permitting and construction (development) purposes, replacing all previously effective less restrictive flood hazard data provided by FEMA.
(Ord. 2-2021, passed 2-8-2021)