Gold mine tailings which coul eventually wash into the local watershed. Probably Deadwood Valley, South Dakota, instead of Deadwood Valley, Oregon.
Image ID: fish6607, NOAA's Historic Fisheries Collection Location: South Dakota ?, Deadwood area Photo Date: 1984 Summer Credit: NMFS/Northwest Fisheries Science Center; Pacific Northwest Collection Category: Historic Fisheries/Salmon/ • High Resolution Photo Available
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