Description: The updated Ogallala - Roger Mills aquifer boundary was created for the Hydrologic Investigation of the Ogallala - Roger Mills aquifer in West-Central Oklahoma 2020, using geologic maps, satellite images, field observations, and well logs from the OWRB database. The extent of the aquifer as defined in this study is the area underlain by the Ogallala Formation in Roger Mills County. The aquifer extent is primarily based on the Oklahoma Geological Survey (OGS) preliminary geologic map of the Foss Reservoir quadrangle and the Elk City quadrangle geologic map. Discrepancies between the OGS maps were rectified using satellite imagery and field observations, specifically from 35°24ˈ23ˈˈN to 35°30ˈ55ˈˈ and 99°38ˈ27ˈˈW to 100°0ˈ0ˈˈW. The Ogallala Formation continues west into Texas, which is beyond OWRB jurisdiction, and north of the Canadian River, where it is referred to as the Ogallala – Northwest aquifer by the OWRB. This dataset is tentative and pending Board approval for permitting use.
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Description: The Ogallala - Roger Mills boundary created for the Hydrogeologic Investigation of the Ogallala Aquifer in Roger Mills and Beckham Counties, Western Oklahoma by Belden and Osborn (2002).
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Name: Elevation of Aquifer Base (25 ft contours), 2020
Display Field: Contour
Type: Feature Layer
Geometry Type: esriGeometryPolyline
Description: This dataset represents the base of the Ogallala - Roger Mills aquifer. The elevation of the aquifer base ranges from 2,125-2,380 feet above NAVD 88. The interpretation of the base of the aquifer is based on analysis of lithologic data obtained from 353 groundwater well completion reports submitted to the OWRB by licensed well drillers. The base was recognized by a change from brown or tan sands and gravels to red shales and sandstones of the underlying Permian formations. To create the map, a point shapefile was created in ArcMap representing each well location with base elevation data (BaseElev_Wells_20171109_JS). A raster was then created using the IDW tool (Base_Elev_20171109_Jsb) to interpolate the base elevation of the aquifer across the study area. The raster was then converted to a series of contours at 25 ft. intervals (Base_Elev_20171109_Jsb) using the contour tool in ArcMap, which were then smoothed and manually adjusted by OWRB staff for clarity based on professional judgement. This dataset was created as a product of the Ogallala - Roger Mills hydrologic investigation and is included here for informational purposes only.
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Description: This dataset represents the base of the Ogallala - Roger Mills aquifer. The elevation of the aquifer base ranges from 2,125-2,380 feet above NAVD 88. The interpretation of the base of the aquifer is based on analysis of lithologic data obtained from 353 groundwater well completion reports submitted to the OWRB by licensed well drillers. The base was recognized by a change from brown or tan sands and gravels to red shales and sandstones of the underlying Permian formations. To create the map, a point shapefile was created in ArcMap representing each well location with base elevation data (BaseElev_Wells_20171109_JS). A raster was then created using the IDW tool (Base_Elev_20171109_Jsb) to interpolate the base elevation of the aquifer across the study area. The raster was then converted to a series of contours at 25 ft. intervals (Base_Elev_20171109_Jsb) using the contour tool in ArcMap, which were then smoothed and manually adjusted by OWRB staff for clarity based on professional judgement. The contours were then converted to a raster using the Topo To Raster tool. This dataset was created as a product of the Ogallala - Roger Mills hydrologic investigation and is included here for informational purposes only.
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Name: Elevation of Aquifer Base (50 ft contours), 2000
Display Field: LENGTH
Type: Feature Layer
Geometry Type: esriGeometryPolyline
Description: This dataset represents the base of the Ogallala - Roger Mills aquifer created by Belden and Osborn (2002). The interpretation of the base of the aquifer is based on analysis of lithologic data obtained from 200 groundwater well completion reports submitted to the OWRB by licensed well drillers.
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Name: Elevation of Potentiometric Surface (ft), 2017
Display Field: Contour
Type: Feature Layer
Geometry Type: esriGeometryPolyline
Description: This map was created by using water-levels obtained from well measurements by OWRB staff in January 2017 as well as historic water-level data in portions of the aquifer with little to no water level data. The potentiometric surface elevations were calculated by subtracting the depth to water from the surface elevation. This data was used to create a shapefile of the wells (PotSurf_Wells_20171019_JS) in ArcMap with water-table elevations. Contours for the potentiometric surface elevation were then drawn by OWRB staff (Pot_Surface_Contours_simplified_20170829_JS). This dataset was created as a product of the Ogallala - Roger Mills hydrologic investigation and is included here for informational purposes only.
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Name: Elevation of Potentiometric Surface (ft), 2000
Display Field: LENGTH
Type: Feature Layer
Geometry Type: esriGeometryPolyline
Description: This dataset represents the water table elevation of the Ogallala - Roger Mills aquifer created for the Hydrogeologic Investigation of the Ogallala Aquifer in Roger Mills and Beckham Counties, Western Oklahom by Belden and Osborn (2002). The interpretation of the base of the aquifer is based on analysis of lithologic data obtained from 200 groundwater well completion reports submitted to the OWRB by licensed well drillers.
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Description: Saturated thickness raster of the Ogallala - Roger Mills aquifer in west-central Oklahoma displaying the thickness of the groundwater level (potentiometric) surface in the Ogallala - Roger Mills aquifer to the base of the Ogallala Formation. Saturated thickness ranges between 0-166 feet, with an average saturated thickness of 45 feet. The raster was created by subtracting the base elevation raster from potentiometric surface raster of the aquifer.
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Description: This dataset was created as part of the hydrogeologic investigation of the Ogallala - Roger Mills aquifer in west-central Oklahoma using climate, soil, and land-use data. The spatially distributed recharge estimates were calculated using the SWB code developed by Westenbroek and others (2010).
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Default Visibility: false
MaxRecordCount: 0
Supported Query Formats: JSON, AMF, geoJSON
Min Scale: 0
Max Scale: 0
Supports Advanced Queries: false
Supports Statistics: false
Has Labels: false
Can Modify Layer: false
Can Scale Symbols: false
Use Standardized Queries: true
Extent:
XMin: NaN
YMin: NaN
XMax: NaN
YMax: NaN
Spatial Reference: 102039
(102039)
Description: This dataset was created as part of the hydrogeologic investigation of the Ogallala - Roger Mills aquifer in west-central Oklahoma using climate, soil, and land-use data. The spatially distributed recharge estimates were calculated using the SWB code developed by Westenbroek and others (2010).
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Default Visibility: false
MaxRecordCount: 0
Supported Query Formats: JSON, AMF, geoJSON
Min Scale: 0
Max Scale: 0
Supports Advanced Queries: false
Supports Statistics: false
Has Labels: false
Can Modify Layer: false
Can Scale Symbols: false
Use Standardized Queries: true
Extent:
XMin: NaN
YMin: NaN
XMax: NaN
YMax: NaN
Spatial Reference: 102039
(102039)
Description: This dataset was created as part of the hydrogeologic investigation of the Ogallala - Roger Mills aquifer in west-central Oklahoma using climate, soil, and land-use data. The spatially distributed recharge estimates were calculated using the SWB code developed by Westenbroek and others (2010).
Definition Expression: N/A
Copyright Text: Oklahoma Water Resources Board - Water Rights Administration Division, Technical Studies
Default Visibility: false
MaxRecordCount: 0
Supported Query Formats: JSON, AMF, geoJSON
Min Scale: 0
Max Scale: 0
Supports Advanced Queries: false
Supports Statistics: false
Has Labels: false
Can Modify Layer: false
Can Scale Symbols: false
Use Standardized Queries: true
Extent:
XMin: NaN
YMin: NaN
XMax: NaN
YMax: NaN
Spatial Reference: 102039
(102039)