Plant at Otay, Calif., near Mexico boundary, supplies Los Angeles with building materials; gasolinedriven crane with 45-foot boom and 1 1/4-cu. yd. bucket loads 5-cu. yd. dump cars; 8-ton gasoline locomotive hauls cars to grinding and screening plant; material is crushed, ground, washed, screened, and graded into sand product, and 1/2 in., 1 in., and 2 in. rock; plant capacity is 100 tons per hr.
Spreckles commercial company recovers coarse gravel, from dry river bed
Pit Quarry
Pit and Quarry ; 18 , n 5
1929
4 pages
7 Figs.
Article (Journal)
English
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