1. Geology, structure, and thickness of hydrogeologic units in part of the Columbia Plateau, Oregon Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Portland, Oregon : Department of the Interior, United States Geological Survey, 1990 Resource Type: Map Access & Availability: Loading
2. Ground-water levels spring 1985, and ground-water level changes spring 1983 to spring 1985, in three basalt units underlying the Columbia Plateau, Washington and Oregon Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Tacoma, Washington : Department of the Interior, United States Geological Survey, 1989 Resource Type: Map Access & Availability: Loading
3. Ground-water levels in three basalt hydrologic units underlying the Columbia Plateau, Washington and Oregon, spring 1984 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : Department of the Interior, United Stattes Geological Survey, 1986 Resource Type: Map Access & Availability: Loading