Treatment plant at Minnesota Flats to treat AMD from the Richmond and Lawson Portals. Water raised PH 1 - 11 to ppt sludge. The sludge was hauled to Brick Flat pit.

Image ID: r00imm39, NOAA's Restoration Center Collection
Location: Redding, Shasta County, California
Photo Date: November 17, 1994
Credit: NOAA Restoration Center & Damage Assessment and Restoration Program

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