North of the Hot Zone

Click on the map above to enlarge.  A higher resolution map (3.2 MB PDF) Excellent WA State Map. These maps were issued by the Dept. of Energy’s Idaho lab.  The map shows some of the 34 thermal hot springs and the 941 high temperature wells that have been drilled (primarily around the Columbia River Basin).  Greater thermal resources are believed to reside along the western flank of the Cascades.  However, thermal springs in this area are masked by high levels of rainfall and precipitation.  Though issued earlier this decade, primary data is extracted from the 1983 Geologic assessment of geothermal potential.

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