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Table 2: Sources of Mapping Assistance. Type of Hazard Alluvial Fan Flooding Areas Behind Unsafe or Inadequate Levee s Areas Below Unsafe or Inadequate Dams Coastal Flooding and Erosion Flash Flooding Lake Level Fluctuation Mapping Methods, Data * Topographic maps from U.S. Geological Survey * County Soil Surveys from U.S. Soil Conservation Service (type of sediment) * Aerial photographs - from U.S. Agricultural Stabilization and Conservation Service (locate fan formations) * Map methodology from Federal Emergency Management Agency (See bibliography for other methods.) * FEMA flood maps * U.S. Soil Conservation Service flood-maps * U.S. Army Corps of Engineers Dam Safety reports * State Dam Safety Reports, * FEMA map feasibility study. * Colorado and California Dam Safety Programs * State maps and a variety of data from state coastal zone management and floodplain management programs, state university sea grant and college programs. * Historic and current maps from the U.S. Geological Survey, U.S. Coast and Geodetic Survey, U.S. Agricultural Stabilization & Conservation Service, state university cartographers. * List of flash-flood prone communities, National Weather Service * FEMA flood maps * State floodplain management agencies U.S, Geological Survey topographic maps * Records of events, damages and hydrologic studies from the U.S, Army Corps of Engineers, Soil Conservation Service, state water re source and floodplain management agencies * Local newspaper archives, long-term residents. * Historical lake level data from U.S. Geological Survey (topographic maps show lake area) * State agency records (regular lake gauge reading program, special studies in conjunction with permits) * Long-term residents (survey and photographs) * State historical society (land survey records), B-ll