![Fairplay colorado dredge mining](https://cdn2.cdnme.se/5447227/9-3/12_64e61dfbddf2b3652190246e.png)
![fairplay colorado dredge mining fairplay colorado dredge mining](http://media.ruralradio.co/wordpress/2016/06/RRN_WaterTrip_Dredge.jpg)
Cyanide heap leaching: This method is used to extract gold from low-grade ore. Gravel and sand are washed through a sluice or a dredge to separate the heavy gold particles.Ĥ. Placer mining: This method is used to mine for gold that has been deposited in streams and rivers. Miners excavate tunnels and shafts to reach the gold-bearing ore, which is then removed and processed.ģ. Underground mining: This method is used when gold is located deeper in the ground. Heavy machinery is used to remove waste rock and soil, exposing the gold-bearing ore.Ģ. Open-pit mining: This method is used when gold is located near the surface. Sponsored by the Colorado State Library, the regional library systems of Colorado, and the Institute of Museum and Library Services.Ĭolorado School of Mines.There are several methods for mining gold, but some of the most common include:ġ. Dredge operations were suspended in 1942 and resumed in 1945, and finally shut down permanently in 1952. The dredge mined up to 15,000 cubic yards of placer gravels per day and could reach to a depth of 105 feet. The stacker then deposited the tailings along the river channel. The dredge had over 100 buckets that fed gravel from the river bottom into the dredge's interior where it was milled. The Fairplay dredge was electrically operated and was the largest dredge in Colorado. The South Platte Dredging Company used it to mine the Fairplay placer along the South Platte River starting in 1941. This dredge boat was built by the Yuba Manufacturing Company and shipped to Fairplay, Colorado in sections.
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Slide showing the bow gantry and tern gantry on the Fairplay dredge, which was under construction. Held in the National Mining Hall of Fame and Museum.
![Fairplay colorado dredge mining](https://cdn2.cdnme.se/5447227/9-3/12_64e61dfbddf2b3652190246e.png)