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Scientific Investigations Report 2012–5261


Groundwater Status and Trends for the Columbia Plateau Regional Aquifer System, Washington, Oregon, and Idaho


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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

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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