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GWRP > Regional Groundwater Availability Studies Geospatial Data > Columbia Plateau
Columbia Plateau Regional Aquifer System
The Columbia Plateau regional aquifer system (CPRAS) covers parts of Idaho, Oregon, and Washington. The primary aquifers of the CPRAS are basaltic lava flows of the Columbia River Basalt Group and overlying basin-fill sediments. Generalized geologic units for the CPRAS include Overburden, Saddle Mountains Basalt, Mabton Interbed, Wanapum Basalt, Vantage Interbed, Grande Ronde Basalt, and Older Bedrock.
The data files listed below are supplemental to the USGS Scientific Investigations Report 2010-5246 titled 'Three-dimensional model of the geologic framework for the Columbia Plateau Regional Aquifer System, Idaho, Oregon, and Washington.' The report includes a description of methods used to derive the data.
Click on the links below to download files (see Explanation of spatial data formats).