A Review of Mining in California During 1919 1921 With Notes On the Outlook
A Review of Mining in California During 1919 1921 With Notes On the Outlook
California State Mining Bureau
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B. Shipping point. One plant making a 50 per cent concentrate has just resumed milling, and two others are reported getting ready to produce. The demand is small, how r ever, and as far as the producer of low grade ore is concerned, there is little future unless he has a mill, near the railroad. El Dorado, Placer and Nevada counties were leading producers during the war. Copper production has been curtailed or suspended at many prop- erties pending a rise in the market, but many mines are activ...e in the Plumas copper belt. The Engels Copper Company will probably be the state's leading producer again this year. Walker Brothers mine has been keeping several large auto trucks busy hauling concentrate this summer, pending the completion of a new tramway to the Western Pacific Railway. Several small properties have been active near Engels but the full extent of this copper belt has not yet been determined. 20 CALIFORNIA STATE3 MINING BUREAU. Engels Copper Company has been very fortunate in treating their ore by straight flotation as there is no iron sulphide in the ore and the i Milt is a product of much higher copper i-miti-ut than is possible with the ores of Calaveras County.
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