The Mount Vernon Dredge
There were 5 dredges working this stream at one time. They ranged in size fro a No. 2 to a No. 16, the world’s largest dredge. They removed from 150 to 200 million dollars in gold. The Mount Vernon Dredge is a No. 2 dredge and was donated to the museum by Mr. Harold Lynch and Mr. Joe Gray in 1985. It worked Deadwood Gulch and Crooked River of Idaho.
The dredge was built at a cost of $37,350 in 1937. The bucket line has 65 two cubic foot buckets and digs 2,000 cubic yards per day. It has a digging depth of 20 ft and was powered by diesel electric generators. The gravel, which contains the free gold, is picked up in the buckets, dumped into a revolving screen, referred to as a trommel, where it is washed. Oversize gravel is dumped behind the boat with a conveyer belt, referred to as a stacker. The gold bearing gravel passes into riffled sluice boxes, then into a mercury trap before being discharged at the rear of the boat. On clean-up day the sluices are cleaned, the amalgam restored and sent to the smelter. The Chilean Wheel, sometimes called Chi Mill by Americans, was a superior crusher capable
The other mining relics on display throughout the grounds have been collected from numerous mining sights [sic] in Montana.
Location. 45° 18.316′ N, 111° 57.93′ W. Marker is near Virginia City, Montana, in Madison County. Marker is on Montana Highway 287 (State Highway 287). Touch for map. The Mount Vernon Dredge is located in Nevada City. MT. Nevada City, MT is located about 1.5 miles west of Virginia City, MT on Montana Highway 287. Marker is in this post office area: Virginia City MT 59755, United States of America.
Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies. Madison County Pioneers (approx. 0.2 miles away); Nevada City (approx. 0.2 miles away);
Also see . . . Virtual Tour of Gold Dredge #8 - Alaska Dreams. (Submitted on November 16, 2011, by Barry Swackhamer of San Jose, California.)
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Credits. This page was last revised on June 16, 2016. This page originally submitted on November 16, 2011, by Barry Swackhamer of San Jose, California. This page has been viewed 1,041 times since then. Photos: 1, 2, 3, 4, 5, 6. submitted on November 16, 2011, by Barry Swackhamer of San Jose, California. • Bill Pfingsten was the editor who published this page.