Figure 20. Distance of the well bottom from the simulated top of Grande Ronde Basalt compared with water levels measured in wells near the Washington State Department of Ecology administrative areas in parts of the Palouse Slope/eastern Yakima Fold Belt and the Columbia Basin Ground Water Management Area, Washington. Palouse western well group for (A) 1968; (B) 1984; (C) 2006; Palouse eastern well group for (D) 1968; (E) 1984; (F) 2006; and Palouse southern well group for (G) 1968; (H) 1984; and (I) 2006. Locations of groups are shown in figure 15.

First posted February 5, 2013