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activity Administration Alaska Apalachicola Apalachicola River Assessment Basin Board of County California cartographic Cascade volcanoes City Commission conodont conterminous United Cooperative County Commissioners data base Denver Department of Public deposits digital data digital line graphs Earth Resources Observation earth science earthquakes Energy Environmental eruptions evaluation faults Federal agencies fiscal year 1982 Flood Control Geologic Division Geologist ground water ground-water hazards Highways hydrologic Information Systems Investigations Irrigation Landsat Long Valley Caldera magma major Mammoth Lakes ment million mineral resources Minerals Management Service monitoring Municipal Water National Center National Mapping Division Nevada oil and gas percent Planning potential Potomac River produced Puerto Rico quadrangle radiometer Regional Research Resources Observation Systems resurgent dome rocks sediments seismic square miles STOP studies Survey's techniques Texas tidal Potomac River tidal river tion topographic Transportation U.S. Geological Survey volcanic Water Conservation District Water District Water Management Western Wildlife zone