Williston and Powder River Basins aquifer systems
The Williston and Powder River Basins study combines the lithostratigraphic units of the glacial, lower Tertiary, and Upper Cretaceous aquifer systems in the United States and Canada into 7 regional hydrogeologic units-glacial deposits, 4 bedrock aquifers, and 2 bedrock confining units-using general hydraulic properties.
The glacial deposits are composed of till and glacial outwash sands and gravels with areas of cobbles and boulders. The four bedrock aquifers are the upper Fort Union, lower Fort Union, lower Hell Creek, and Fox Hills aquifers and are contained primarily in sandstone layers. The two confining units are the middle Fort Union hydrogeologic unit (shale) and upper Hell Creek hydrogeologic unit (contains less sandstone than the underlying lower Hell Creek aquifer). Water from hydrogeologic units in these three aquifer systems is relatively fresh and potable, whereas withdrawals seldom occur from units below the basal confining unit because of great depths (greater than 800 feet) and poor water quality.
The data files listed below are supplemental to Hydrogeologic Framework of the Uppermost Principal Aquifer Systems in the Williston and Powder River Structural Basins, United States and Canada (USGS Scientific Investigations Report 2014-5047). The report includes a description of methods used to derive the data.
Click on the links below to download files for this aquifer. For information about the available file types, see Aquifer data: Explanation of spatial data formats.
Borehole Data: Metadata (22KB XML) Shapefile (93KB ZIP) Text File (42KB ZIP)
Hydrogeologic Unit Extents:
- Glacial Deposits (southern extent) Metadata (19KB XML) Shapefile (57KB ZIP)
- Upper Fort Union Metadata (18KB XML) Shapefile (98KB ZIP)
- Middle Fort Union Metadata (18KB XML) Shapefile (70KB ZIP)
- Lower Fort Union Metadata (18KB XML) Shapefile (80KB ZIP)
- Upper Hell Creek Metadata (19KB XML) Shapefile (269KB ZIP)
- Lower Hell Creek Metadata (19KB XML) Shapefile (84KB ZIP)
- Fox Hills Metadata (19KB XML) Shapefile (87KB ZIP)
Hydrogeologic Unit Surfaces:
Powder River Basin
- Upper Fort Union (top) Metadata (15KB XML) Raster (148KB ZIP) ASCII grid (141KB ZIP)
- Middle Fort Union (top) Metadata (15KB XML) Raster (198KB ZIP) ASCII grid (186KB ZIP)
- Lower Fort Union (top) Metadata (15KB XML) Raster (225KB ZIP) ASCII grid (214KB ZIP)
- Upper Hell Creek (top) Metadata (15KB XML) Raster (251KB ZIP) ASCII grid (239KB ZIP)
- Lower Hell Creek and Fox Hills (top) Metadata (16KB XML) Raster (276KB ZIP) ASCII grid (262KB ZIP)
- Basal confining unit (top) Metadata (15KB XML) Raster (284KB ZIP) ASCII grid (270KB ZIP)
Williston River Basin
- Upper Fort Union (top) Metadata (27KB XML) Raster (370KB ZIP) ASCII grid (349KB ZIP)
- Middle Fort Union (top) Metadata (27KB XML) Raster (344KB ZIP) ASCII grid (329KB ZIP)
- Lower Fort Union (top) Metadata (27KB XML) Raster (616KB ZIP) ASCII grid (593KB ZIP)
- Upper Hell Creek (top) Metadata (27KB XML) Raster (727KB ZIP) ASCII grid (707KB ZIP)
- Lower Hell Creek (top) Metadata (27KB XML) Raster (801KB ZIP) ASCII grid (784KB ZIP)
- Fox Hills (top) Metadata (27KB XML) Raster (927KB ZIP) ASCII grid (905KB ZIP)
- Basal confining unit (top) Metadata (27KB XML) Raster (939KB ZIP) ASCII grid (920KB ZIP)
Hydrogeologic Unit Thicknesses:
Powder River Basin
- Upper Fort Union Metadata (15KB XML) Raster (158KB ZIP) ASCII grid (151KB ZIP)
- Middle Fort Union Metadata (15KB XML) Raster (198KB ZIP) ASCII grid (188KB ZIP)
- Lower Fort Union Metadata (15KB XML) Raster (222KB ZIP) ASCII grid (210KB ZIP)
- Upper Hell Creek Metadata (15KB XML) Raster (245KB ZIP) ASCII grid (233KB ZIP)
- Lower Hell Creek and Fox Hills Metadata (15KB XML) Raster (264 KB ZIP) ASCII grid (249KB ZIP)
Williston River Basin
- Glacial aquifer system Metadata (32KB XML) Raster (406KB ZIP) ASCII grid (404KB ZIP)
- Upper Fort Union Metadata (32KB XML) Raster (301KB ZIP) ASCII grid (296KB ZIP)
- Middle Fort Union Metadata (32KB XML) Raster (344KB ZIP) ASCII grid (338KB ZIP)
- Lower Fort Union Metadata (32KB XML) Raster (620KB ZIP) ASCII grid (607KB ZIP)
- Upper Hell Creek Metadata (32KB XML) Raster (738KB ZIP) ASCII grid (712KB ZIP)
- Lower Hell Creek Metadata (32KB XML) Raster (810KB ZIP) ASCII grid (776KB ZIP)
- Fox Hills Metadata (32KB XML) Raster (930KB ZIP) ASCII grid (912KB ZIP)
Below are other webpages associated with this aquifer.
Principal Aquifers of the United States
Regional Groundwater Availability Studies
Below are publications associated with this aquifer.
Hydrogeologic framework of the uppermost principal aquifer systems in the Williston and Powder River structural basins, United States and Canada
Ground Water Atlas of the United States
The Williston and Powder River Basins study combines the lithostratigraphic units of the glacial, lower Tertiary, and Upper Cretaceous aquifer systems in the United States and Canada into 7 regional hydrogeologic units-glacial deposits, 4 bedrock aquifers, and 2 bedrock confining units-using general hydraulic properties.
The glacial deposits are composed of till and glacial outwash sands and gravels with areas of cobbles and boulders. The four bedrock aquifers are the upper Fort Union, lower Fort Union, lower Hell Creek, and Fox Hills aquifers and are contained primarily in sandstone layers. The two confining units are the middle Fort Union hydrogeologic unit (shale) and upper Hell Creek hydrogeologic unit (contains less sandstone than the underlying lower Hell Creek aquifer). Water from hydrogeologic units in these three aquifer systems is relatively fresh and potable, whereas withdrawals seldom occur from units below the basal confining unit because of great depths (greater than 800 feet) and poor water quality.
The data files listed below are supplemental to Hydrogeologic Framework of the Uppermost Principal Aquifer Systems in the Williston and Powder River Structural Basins, United States and Canada (USGS Scientific Investigations Report 2014-5047). The report includes a description of methods used to derive the data.
Click on the links below to download files for this aquifer. For information about the available file types, see Aquifer data: Explanation of spatial data formats.
Borehole Data: Metadata (22KB XML) Shapefile (93KB ZIP) Text File (42KB ZIP)
Hydrogeologic Unit Extents:
- Glacial Deposits (southern extent) Metadata (19KB XML) Shapefile (57KB ZIP)
- Upper Fort Union Metadata (18KB XML) Shapefile (98KB ZIP)
- Middle Fort Union Metadata (18KB XML) Shapefile (70KB ZIP)
- Lower Fort Union Metadata (18KB XML) Shapefile (80KB ZIP)
- Upper Hell Creek Metadata (19KB XML) Shapefile (269KB ZIP)
- Lower Hell Creek Metadata (19KB XML) Shapefile (84KB ZIP)
- Fox Hills Metadata (19KB XML) Shapefile (87KB ZIP)
Hydrogeologic Unit Surfaces:
Powder River Basin
- Upper Fort Union (top) Metadata (15KB XML) Raster (148KB ZIP) ASCII grid (141KB ZIP)
- Middle Fort Union (top) Metadata (15KB XML) Raster (198KB ZIP) ASCII grid (186KB ZIP)
- Lower Fort Union (top) Metadata (15KB XML) Raster (225KB ZIP) ASCII grid (214KB ZIP)
- Upper Hell Creek (top) Metadata (15KB XML) Raster (251KB ZIP) ASCII grid (239KB ZIP)
- Lower Hell Creek and Fox Hills (top) Metadata (16KB XML) Raster (276KB ZIP) ASCII grid (262KB ZIP)
- Basal confining unit (top) Metadata (15KB XML) Raster (284KB ZIP) ASCII grid (270KB ZIP)
Williston River Basin
- Upper Fort Union (top) Metadata (27KB XML) Raster (370KB ZIP) ASCII grid (349KB ZIP)
- Middle Fort Union (top) Metadata (27KB XML) Raster (344KB ZIP) ASCII grid (329KB ZIP)
- Lower Fort Union (top) Metadata (27KB XML) Raster (616KB ZIP) ASCII grid (593KB ZIP)
- Upper Hell Creek (top) Metadata (27KB XML) Raster (727KB ZIP) ASCII grid (707KB ZIP)
- Lower Hell Creek (top) Metadata (27KB XML) Raster (801KB ZIP) ASCII grid (784KB ZIP)
- Fox Hills (top) Metadata (27KB XML) Raster (927KB ZIP) ASCII grid (905KB ZIP)
- Basal confining unit (top) Metadata (27KB XML) Raster (939KB ZIP) ASCII grid (920KB ZIP)
Hydrogeologic Unit Thicknesses:
Powder River Basin
- Upper Fort Union Metadata (15KB XML) Raster (158KB ZIP) ASCII grid (151KB ZIP)
- Middle Fort Union Metadata (15KB XML) Raster (198KB ZIP) ASCII grid (188KB ZIP)
- Lower Fort Union Metadata (15KB XML) Raster (222KB ZIP) ASCII grid (210KB ZIP)
- Upper Hell Creek Metadata (15KB XML) Raster (245KB ZIP) ASCII grid (233KB ZIP)
- Lower Hell Creek and Fox Hills Metadata (15KB XML) Raster (264 KB ZIP) ASCII grid (249KB ZIP)
Williston River Basin
- Glacial aquifer system Metadata (32KB XML) Raster (406KB ZIP) ASCII grid (404KB ZIP)
- Upper Fort Union Metadata (32KB XML) Raster (301KB ZIP) ASCII grid (296KB ZIP)
- Middle Fort Union Metadata (32KB XML) Raster (344KB ZIP) ASCII grid (338KB ZIP)
- Lower Fort Union Metadata (32KB XML) Raster (620KB ZIP) ASCII grid (607KB ZIP)
- Upper Hell Creek Metadata (32KB XML) Raster (738KB ZIP) ASCII grid (712KB ZIP)
- Lower Hell Creek Metadata (32KB XML) Raster (810KB ZIP) ASCII grid (776KB ZIP)
- Fox Hills Metadata (32KB XML) Raster (930KB ZIP) ASCII grid (912KB ZIP)
Below are other webpages associated with this aquifer.
Principal Aquifers of the United States
Regional Groundwater Availability Studies
Below are publications associated with this aquifer.