In the Approximated Floodplain (Zones A and AO), the following additional regulations apply. In the enforcement of this Division I, the Planning Department must obtain, review, and reasonably use any base-flood elevation and floodway data available from Federal, State, or other sources, such as the U.S. Army Corps of Engineers, the Soil Conservation Service, the State Water & Science Administration, or any regional planning organization. When the base-flood elevation is not known, the Planning Department, in consultation with the State Water & Science Administration, must evaluate each site and establish an approximate base-flood elevation. City Code, 1976/83, art. 7, §5(c) 2000, art. 7, §3-31 Ord. 88-188 Ord. 11-516 Ord. 14-208 Ord. 21-020