. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. 00 feet long. East and westveins have slate walls, while hanging-wall vein has a slate footwall andgreenstone hanging-wall. In crosscutting the slates thin lenses ofmetadiabase are cut. Present work is being carried on the 2800, 3000,3100 levels, where some very good grade ore has been developed uponthe east and west veins. Ore is hoisted in 2-ton skips by 16x28 doubledrum steam hoist. Power is furnished by two 60 boilers, oil beingused as fuel. Air for mining operations
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. 00 feet long. East and westveins have slate walls, while hanging-wall vein has a slate footwall andgreenstone hanging-wall. In crosscutting the slates thin lenses ofmetadiabase are cut. Present work is being carried on the 2800, 3000,3100 levels, where some very good grade ore has been developed uponthe east and west veins. Ore is hoisted in 2-ton skips by 16x28 doubledrum steam hoist. Power is furnished by two 60 boilers, oil beingused as fuel. Air for mining operations is furnished by (19xl6,12xl6) Ingersoll compressor, driven by 150 motor. Ore frombins fed by gravity to 10xl6 Blake crusher, then trammed to mill. Mill: 40 stamps, of 1150 pounds apiece, dropping 100 drops perminute, crushing 4]- tons per stamp through 24-mesh screen, pulp fromamalgamation plates goes to thirty-six 6-foot Frue vanners. Mill drivenby 75 motor. Only 20 stamps under operation. Central EurekaMining Company, owner, 254 Russ Building, San Francisco; J. Davis,general manager. AMADOR COUNTY. 25. M 26 MINES AND MINERAL RESOURCES. Clark Gravel Mine (placer). It is 2 miles south of Oleta. Courseof channel is northeast and southwest. Capped with andesite flow 100feet thick. Width of channel is from 60 to 300 feet. Depth of gravelfrom 4 to 7 feet and slightly cemented. Developments consist of twobedrock tunnels 800 feet in length. Two men are employed. W. F. M. Clark et al, Oleta, owners. Cleveland Consolielatecl Placer Mine (placer). It is situated -]- ofmile northwest of Volcano. Course of channel is northwest and south-east. Capped with andesite flow 150 feet thick. Width of channel 60to 150 feet, with a depth of gravel of 18 inches to 3 feet. The bedrockis slate. Developments consist of tunnel driven 417 feet west in slatebedrock and then northwest on channel 1100 feet. The gravel iscemented, containing large boulders of quartz and quartzite. The gra
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
