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Search U.S. government technical reports digitized or harvested by TRAIL.
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5 results returnedGold mining and milling in the Black Canyon area, Yavapai County, Ariz.
Placer operations of Humphreys Gold Corporation, Clear Creek, Colo.
Mining and milling methods and costs at the Summitville Consolidated Mines, Inc., Summitville, Colo.
Mining of feldspar and associated minerals in the southern Black Hills of South Dakota
Mining and milling methods and costs in the Alma district, Colorado
Published Year
Subject
- Feldspar industry--South Dakota--Black Hills (1)
- Gold mines and mining--Arizona--Yavapai County (1)
- Gold mines and mining--Colorado (1)
- Gold--Milling (1)
- Hydraulic mining (1)
- Mines and mineral resources--Colorado (1)
- Mines and mineral resources--Colorado--Alma (1)
Author
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