Ground Water Resources Of Five Mile Prairie Spokane County Washington

Author : Sue C. Kahle
Publisher : CreateSpace
ISBN 13 : 9781500551766
Total Pages : 60 pages
Book Rating : 4.5/5 (517 download)

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Download or read book Hydrogeology of the Little Spokane River Basin, Spokane, Stevens, and Pend Oreilles Counties, Washington written by Sue C. Kahle and published by CreateSpace. This book was released on 2014-07-16 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the hydrogeologic framework of the Little Spokane River Basin was conducted to identify and describe the principal hydrogeologic units in the study area, their hydraulic characteristics, and general directions of groundwater movement. The Little Spokane River Basin includes an area of 679 square miles in northeastern Washington State covering parts of Spokane, Stevens, and Pend Oreille Counties. The groundwater system consists of unconsolidated sedimentary deposits and isolated, remnant basalt layers overlying crystalline bedrock. In 1976, a water resources program for the Little Spokane River was adopted into rule by the State of Washington, setting instream flows for the river and closing its tributaries to further uses. Spokane County representatives are concerned about the effects that additional groundwater development within the basin might have on the Little Spokane River and on existing groundwater resources. Information provided by this study will be used in future investigations to evaluate the effects of potential increases in groundwater withdrawals on groundwater and surface-water resources in the basin. The hydrogeologic framework consists of eight hydrogeologic units: the Upper aquifer, Upper confining unit, Lower aquifers, Lower confining unit, Wanapum basalt unit, Latah unit, Grande Ronde basalt unit, and Bedrock. The Upper aquifer is composed mostly of sand and gravel and varies in thickness from 4 to 360 ft, with an average thickness of 70 ft.