Gold washing in Finnish Lapland

Organic gold mining in this does not use mercury and cyanide. On the Pelton turbine which rotates the drum. The drum unit under the chute where the rubber rifling. Pit drainage pump is 200 l/min. Main pump is 500 l/min. Tubing size is 2". Add pictures in the link http://www.rysky.kuvat.fi/kuvat/