Phots shows the lower level of the Yellowjacket mill. Ore was dumped beside the mill, then washed into a trough that fed into the trommel screen. The trommel discharged onto the wilfly table which caught the free gold.
Hydraulic placer mining on the Boise River near Twin Springs in Elmore County, Idaho. Photo shows a miner operating a hydraulic giant on a hillside while another miner is inspecting the runoff in the ground sluice below.