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This is a coverage of the Colorado Plateau coal assessment study area. The study area outline was drawn on the county lines that most closely outline the coal-bearing rocks in the Colorado Plateau Region. The county outlines originate from a national coverage for which lines were extracted from U.S. Census 1990 TIGER/line files using an AML program written by Nebert, D., and Negri, M., USGS-Water Resources Division (WRD), running on two Data General 6220 servers.
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This ArcView shapefile contains a polygon representation of the northern part (Jim Bridger area) of the Point of Rocks-Black Butte coalfield in the Greater Green River Basin, Wyoming. This boundary is a part of the National Coal Resource Assessment of the Northern Rocky Mountain and Great Plains Fort Union Coal Resources Assessment Area. This shapefile can be shown in relation to other relevant themes of this area.
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The Tokio Formation in southwestern Arkansas, hereafter referred to as the Tokio aquifer, is a source of groundwater for agricultural, domestic, industrial, and public use in Clark, Hempstead, Little River, Miller, Pike, and Nevada counties. Water-level altitudes measured 42 wells completed in the Tokio aquifer during 2014 and 2015 were used to create a potentiometric-surface map. In southwestern Arkansas, potentiometric surfaces indicate that groundwater flow in the Tokio aquifer is towards the city of Hope. Northwest of the city of Hope, a cone of depression may exist. In southwestern Pike, northwestern Nevada, and northeastern Hempstead Counties, an area of artesian flow (water levels are at or above land surface)...
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This ArcView shapefile contains a polygon representation of the Deadman coal zone in the Black Butte area of the Point of Rocks-Black Butte coalfield, Wyoming. This boundary is a part of the National Coal Resource Assessment of the Northern Rocky Mountain and Great Plains Fort Union Coal Resources Assessment Area. This coal zone can be shown in relation to other relevant themes of this area.
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The Nacatoch Sand in northeastern and Arkansas, is sources of groundwater for agricultural, domestic, industrial, and public use Clay and Green Counties. Water-level altitudes measured in 12 wells completed in the Nacatoch Sand and were used to create a potentiometric-surface map. Potentiometric surfaces show that groundwater in the Nacatoch aquifer flows southeast toward the Mississippi River in northeastern Arkansas. This shapefile contains the generalized study area of the Northeast Nacatoch aquifer.
    map background search result map search result map Northern Rockies Study Area NE Nacatoch study area.shp Tokio study area Boundary for the Deadman coal zone in the Black Butte area (bbbndg.shp) Boundary for Deadman coal zone in the Jim Bridger area (jbbndg.shp) Wyodak-Anderson coal zone study limit in the Powder River Basin, Wyoming and Montana (wabndg.shp) The Colorado Plateau coal assessment study area, 2000 (cpstdyg) Study limit boundaries for the Ferris 23, 25, 31, 50 and 65 coal zones, Hanna Basin, Wyoming (fer*stdyg) Boundary for the Deadman coal zone in the Black Butte area (bbbndg.shp) Study limit boundaries for the Ferris 23, 25, 31, 50 and 65 coal zones, Hanna Basin, Wyoming (fer*stdyg) Boundary for Deadman coal zone in the Jim Bridger area (jbbndg.shp) NE Nacatoch study area.shp Tokio study area Wyodak-Anderson coal zone study limit in the Powder River Basin, Wyoming and Montana (wabndg.shp) Northern Rockies Study Area The Colorado Plateau coal assessment study area, 2000 (cpstdyg)