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Collection: Directories and Documents > Pamphlets

Mining Methods in Grass Valley District California From Transactions of the American Institute of Mining and Metallurgical Engineers by J A Fulton and A B Foote (PH 2-6) (1927) (14 pages)

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Mining Methods ‘in Grass Valley District, California He By J. A. For, 'TON, * Rano, Nev, “and AY B, Foor, t. Grass Vat LEY, Cau. iat? Wow York Mectiog, Fobrunry, 1026)? Gop was aiecoraed in tthe cea Nevada by J, W. Marshail’6 on ae 2, 1848. The town of Grass Valley soon sprang up and contained severalstores in 1849; but the population of the town has always reflected the 4 fluctuations in quartz mining, . Gold-bearing quartz was found on Gold Bah Hill in September 1850, and in the next two years most a the quartz. bearing veins in the vicinity were located. : ete te At first, the quartz was crushed in mortars with spring poles; the Hutt ii Co. took out $20,000 in this ‘manner’ ‘during the’ winter and spring of? 1851; The first mill was put up in January, 1851. « In 1866, there were in Grass Valley 248 stamps, crushing 71,420 tons of ore with an average yield of $30 to $35; in Nevada City, there were 142 stamps, crushing 14,200 tons, with an average value of $25. But in 1918, only two proper-.\ ties in this region, the Empire and the North . Star, were producing. :, Since then, there has been a revival: of mining: in ‘the district and the. ~ following properties are being opened up: The Golden Center, Grass. Valley Gold Mines Co., Idaho-Maryland } Mines Co., while the Sultana ig’ . kent unwatered and work is going on in a half Hee pall proper ties. mA : “Mane Oram oa Lea 4 ‘At ne first meeting of miners in Grace Valley, a 18, 1851, a Sti 30° by 40 ft. was allowed for a claim, the boundaries in all cases being perpendicular. In 1852, the quartz miners in Nevada County decided that “each prospector shall hereafter be entitled to 100 ft, on a quartz ledge“ j or vein and the discoverer shall be’ allowed 100 ft. additional, Mach Soh claim shall include all the dips, angles, § and variations of the vein.” ‘This. : rule was in foree until replaced by the Federal. mining ‘laws of 1872; these . allowed quartz claims to be’ 1500 ft, along the vein, with all the dips, “2, spurs, and angles, and to have a width of 600 ft, The holdings of the principal companies consist of these early pateited a mining claims; standard claims, as authorized by tlic, Act of 1872, both punted and unpatented; agricultural jHEnCts bath patented and eee nse ees ut * Director, Mackay School ‘of Mines. piconet manager, North Star Mines ee : a Obes ‘