Principal aquifers and well yields in Washington [map] / by Dee Molenaar, Peder Grimstad, Kenneth L. Walters ; prepared cooperatively by the U.S. Geological Survey and the State of Washington Department of Ecology.1980
Chehalis River watershed surficial aquifer characterization / by Robert S. Garrigues, Kirk Sinclair and John Tooley. Washington State Dept. of Ecology, Environmental Assessment Program, Watershed Ecology Section. 1988
Geohydrology of the regional aquifer system, western Snake River plain, southwestern Idaho [microform] / by Garth D. Newton ; a contribution of the Regional Aquifer-System Analysis Program. Dept. of the Interior, U.S. Geological Survey. Open-file report ; 88-317.
Owen Microfiche - I 19.76:88-317
A description of aquifer units in eastern Oregon / by Joseph B. Gonthier ; prepared in cooperation with the U.S. Environmental Protection Agency. U.S. Dept. of the Interior, Geological Survey. Water-resources investigations report ; 84-4095. 1985
Geologic framework of the Columbia Plateau Aquifer System, Washington, Oregon, and Idaho / by B.W. Drost, K.J. Whiteman, and J.B. Gonthier. Dept. of the Interior, U.S. Geological Survey. Water-resources investigations report ; 87-4238.
Owen Government Documents - I 19.42/2:87-4238-87:4240 no.87:4238-87:4240
USGS Water Supply Papers (online in the USGS Publications Warehouse) Many of these reports will be highly technical, but you should be able to understand some of the information. WSU Owen has most of them in print, also.
USGS National Map - Search for your location, zoom to it, then choose overlay tab, then mark the hydrography overlay
Ground water atlas of the United States [map]. U.S. Geological Survey. Hydrologic investigations atlas.