From the Nye County, Nevada Photograph Collection (PH-00221) -- Series VII. Other areas in Nye County -- Subseries VII.I. Wilson Family (Toiyabe Mountains, Nevada). In the center of the dredge the screw elevator can be seen. It brought the placer material from the bucket elevator on board the dredge where it was processed. It is said that it took 100 workers to assemble the dredge. The dredge could process between 500 and 1,000 tons of gravel per hour.