History of Utah, 1540-1886 - Brigham Young University

744 AGRICULTURE AND MANUFACTURES.
beam ledge there were in 1882 nine locations, selected
ores from all of them carrying 80 to 100
ounces of silver, besides gold, copper, and lead.
Among the leading mines at that date were the Crismon,
Mammoth, and Eureka Hill, the former with an
ore-chimney 100 feet wide, averaging about $35 per
ton in gold and silver, and 7 or 8 per cent of copper,
the latter producing ores of several descriptions,
which yielded about the same average, and paying
occasional dividends. 63
In the Uintah and Blue Ledge districts, both at
Park City, near tributaries of the Weber and Provo
rivers, is the famous Ontario mine, discovered in
1872, 69 and in 1883 developed to a depth of 800 feet.
The vein is in a quartzite formation, the pay-chute
being several hundred feet in length, and about three
in width. Up to the close of 1883 the total output
exceeded $17,000,000, of which about $6,250,000 had
been disbursed in dividends, the ore producing on an
average about $106 per ton in silver, and the yield
being remarkably uniform. The cost of mining and
milling, with other expenses, was $33 to $34 per ton,
and was largely increased by the flow of water, which
was at the rate of 2,000 gallons per minute. A huge
pumping-engine of the Cornish pattern had been
erected at the mine, with power to drive a double
line of 20-inch pumps at a depth of 2,000 feet. 70
In the San Francisco district in Beaver county,
fifteen miles west of Milford and about 240 south of
Salt Lake City, the leading mine was the Horn Silver,
the outcrop of which resembled the top of a hay-cock,
68 The Tintic mines are further described in the S. L. C. Tribune, Aug. 5,
19, 1871, Feb. 29, 1880, Jan. 1, 1SS1; Wldy Tribune, March 6, 1880.
69 For account of discovery, see Balch's The Mines, Miners, and Mining
Int. of the U.S. in 1882, 788; S. L. Wkly Tribune, Dec. 4, 1880.
70 In Aug. 1885 this mine paid its 110th monthly dividend, the amount
being $75,000, and the total to that date $6,650,000. S. F. Bulletin, Aug. 28,
1885. Additional items relating to the Ontario mine will be found in Sept
Ontario Silver Mg Co., Apr. 1, 1881, to Nov. 30, 1883; Robinson's Sinners and
Saints, 249-59; Utah Gaz., 6; Vallejo Chronicle, May 14, 1SS0. For other
mines in these districts, see S. L. Tribune, Jan. 3, 1880.