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Mercury Levels in Gold Mining Reaches on Seven Washington Rivers and Creeks

Publication number Date Published
11-03-003January 2011
VIEW NOW Mercury Levels in Gold Mining Reaches on Seven Washington Rivers and Creeks (Number of pages: 68) (Publication Size: 2MB)

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Author(s) Johnson, A., M. Friese, and K. Carmack
Description Indicators for mercury contamination were analyzed from seven Washington rivers and creeks with a history of mining for placer gold. Sample types included water, suspended sediment, streambed sediments, benthic invertebrates (caddisflies), and fish (fillets). The waterbodies investigated were the Sultan River in western Washington, and Swauk Creek and tributary Williams Creek, Peshastin Creek and tributaries Ingalls Creek and Negro Creek, Slate Creek, the Similkameen River, Mary Ann Creek, and Strawberry Creek in eastern Washington. Although mercury was moderately elevated in some types of samples, the levels overall do not appear to represent a significant concern for aquatic life, wildlife, or human health.
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Keywords gold, WRIA 62, creek, fish, river, water, mercury, mining
WATERSHED Water Resource Inventory Areas
(WRIA 07,WRIA 39,WRIA 45,WRIA 49,WRIA 52,WRIA 62)
DATA Environmental Information Management (EIM) #AJOH0059


Quality Assurance Project Plan: Potential Impacts from Mercury Used in Historic Gold Mining on Six Rivers and Streams