Figure 12. Estimated stratigraphic position (distance from the well bottom to the simulated top of Grande Ronde Basalt) compared with winter median water-level elevation in selected wells within and immediately adjacent to the Oregon Water Resources Department administrative areas in the Umatilla Basin, Oregon, 1968, 1984, and 2006. (A–C) North–South group; and (D–F) East–West group. Locations of groups are shown in figure 10.

First posted February 5, 2013