American Flat Millsite Virtual Tour

Back to Virtual Tour

Cyanide Plant - The rectangular tank house was a massive steel frame building, covering about 2ΒΌ acres with reinforced concrete floors, retaining walls, tunnels, equipment mountings, and cast sills. Forty redwood mixing and leaching tanks were employed, varying in size from 20 to 60 feet in diameter. The plant's terraced design allowed gravity to control most of the process's solutions to flow through the tanks, 2,600 ft. of tunnels, and eight miles of pipes from the Fine-Grinding Plant to the Moore filter at the bottom.

The tanks and the steel structure are gone, but the massive cement footprint of the cyanide plant remains. The basement level is flooded.

Click Here for American Flat History