Flood damage restoration requires that up-to-date and accurate flood inundation mapping is essential to public health and safety. Maps based on hydraulic modeling estimate where flooding will occur if a dam fails or if a river basin experiences a large storm event. Inundation mapping services result in FEMA permitting, hazard classification of dams, instream hydraulic structure design, spillway and drop structure design, and emergency action plans. Mapping identifies floodplain models.