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Yosemite Rock Quarry. This quarry consists of 80 acres owned by
the Merced Stone Company and leased by the E. B. & A. L. Stone Company,
Rialto Building, San Francisco. The quarry and plant are
located on the Merced River at Jasper Point in Sec. 19, T. 3 S., R. 16 E.,
M. D. M. The rock is an altered quartzite, very hard and of a jaspery
nature. The equipment consists of a steam shovel, compressor and air
drills, three gyratory crushers, screens, bucket conveyors, bins, electric
motors, power line and transformer house. Power is obtained from the
San Joaquin Light and Power Company. The capacity of the plant is
750 tons per ten hours and the rock is sold at from 20 to 30 cents
per ton on the cars of the Yosemite Valley Railroad. Only a few men
were at work when the property was visited.
Merced Stone Company's rock quarry at Jasper Point on the Merced River and the Yosemite
Valley Railroad, Mariposa County, California.
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Mines and Mineral Resources of Frenso, Kern, Kings,
Madera, Mariposa,
San Joaquin, and Stanislaus
California State Mining Bureau Publication
1915
Courtesy of: John Sweetser
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