From introduction: "This report briefly describes the geology of an area of about 750 square miles in Jefferson, Wasco, Crook, and Wheeler Counties, Oregon."
From introduction: This study was made in cooperation with the planning departments of Wasco and Hood River Counties, The purposes of this report are (1) to describe the occurrence, movement, availability, and quality of ground water in the basin; and (2) to assess, where possible, the extent, thickness, hydrologic boundaries, and hydraulic properties of the principal aquifers.
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