. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. 80 feet, and will cut footwall vein at a depth of 4000 feet. Present stoping operations are being carried on from 2700-foot to3600-foot level. On 3300-foot level they have crosscut 210 feet west toeast vein, and 380 feet to west vein, with drifts 840 feet south on eastvein and 75 feet north. On the Avest vein a drift has been driven 600feet north, developing an average of 6 feet of quartz with 2 feet ofgouge on the footwall. On this level west vein has diabase footwallwith sl
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. 80 feet, and will cut footwall vein at a depth of 4000 feet. Present stoping operations are being carried on from 2700-foot to3600-foot level. On 3300-foot level they have crosscut 210 feet west toeast vein, and 380 feet to west vein, with drifts 840 feet south on eastvein and 75 feet north. On the Avest vein a drift has been driven 600feet north, developing an average of 6 feet of quartz with 2 feet ofgouge on the footwall. On this level west vein has diabase footwallwith slate hanging-wall. At 3450-foot level there is a drift north fromcrosscut on west vein 600 feet, with drift south on east vein a distanceof 600 feet. On 3600-foot level, drift north from crosscut on west vein600 feet, and south 500 feet on east vein; developing a vein having anaverage width of 12 feet. At 3600-foot level the east vein has green-stone footwall and slate hanging-wall. A large amount of timbering isused in this mine due mainly to the heavy swelling ground, necessitating 32 MINES AND MINERAL c 3 oO u O V m H< no u Ccu AMADOR COUNTY, 33 the use of lar^e timbers and filling, with waste within one set of the of the filling is derived from crosscuts driven for prospecting theeast and west veins. ^Mining operations are carried on with air drillsAir is furnished by two compressors (15x30) (25x30) Murrycompound Corliss compressor, capacity of 1200 cubic feet of air, and an800-cubic foot Fulton Engineering Company compressor. Nine 80 , oil fired, furnish steam for hoist and compressors. Ore is hoisted
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
