Elevation Grid for top Columbia River Basalt (CRBG) in the Portland Basin used in DDU Feasibility Study tCRBG_ctrl.png

The Portland Basin is a prime location to assess the feasibility of DDU-TES because natural geologic conditions provide thermal and hydraulic separation from overlying aquifers that would otherwise sweep away stored heat. Under the Portland Basin, the lower Columbia River Basalt Group (CRBG) aquifers contain brackish water (1,000-10,000 mg/L TDS), indicating low groundwater flow rates and poor connection with the overlying regional aquifer. Further, CRBG lavas tend to have comparatively low thermal conductivity, indicating that the 400-1,000 ft thick CRBG may be an effective thermal barrier to the overlying aquifer. A temporally and spatially limited previous study of a Portland Basin CRBG aquifer demonstrated that the injection of waste heat resulted in an increase in temperature by more than a factor of two, indicating a high potential for storing heat.

This data submission includes comma delimited .XYZ grid of top Columbia River Basalt (CRBG) elevations in the Portland Basin, a spreadsheet of ArcGIS attribute table for associated data points, a map of data types used to constrain top CRBG, top CRBG structure map created using SMT Kingdom Suite software, and cross sections through top CRBG structure map created using SMT Kingdom Suite software. Map of survey data types used to constrain top CRBG, displayed on a DEM map. Data types include shallow checking, seismic, outcrop, and well data.

Data and Resources

Metadata Source

Additional Info

Field Value
Citation Date 2018-12-01T00:00:00-07:00

Harvest Information

Original ID f0000002-58cc-4372-a567-000000001104
Index Date 2019-02-07T19:18:33-07:00
Original Format ISO-USGIN
Original Version 1.2


Name John Bershaw
Position primary contact
Organization Portland State University
Email bershaw@pdx.edu

Geographic Extent

North Bound 45.543064
South Bound 45.523064
East Bound -122.656483
West Bound -122.676483