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Assessment of Total Dissolved Gas in the Spokane River at Upriver and Little Falls Dams

Publication number Date Published
05-03-010July 2005
VIEW NOW Assessment of Total Dissolved Gas in the Spokane River at Upriver and Little Falls Dams (Number of pages: 66) (Publication Size: 3MB)

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Author(s) Pickett, P.
Description Ecology monitored total dissolved gas (TDG) in the Spokane River during 2003, and compared these and other data to water quality standards. Natural processes generate TDG at Post Falls Dam. Upriver Dam generates TDG levels either below the 110% criterion or below upstream conditions. Long Lake Dam generates elevated TDG but Little Falls Dam contributes no additional TDG. Instead of a TMDL, FERC relicensing 401 certifications are adequate to address impairments. Spokane River TDG should be moved from Category 5 (TMDL required) to either Category 2 (waters of concern) or Category 4B (has a pollutant control plan).
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Keywords gas, Lake Roosevelt, 401, regulatory, Spokane River, WRIA 57, 303(d), river, water, assessment, Total Maximum Daily Load, lake, dam
WATERSHED Water Resource Inventory Areas
(WRIA 54,WRIA 57)
DATA Environmental Information Management (EIM) #SPOKTDG1


Quality Assurance Project Plan: Spokane River Total Dissolved Gas Total Maximum Daily Load Evaluation