San Francisco : Architect and Engineer, Inc · leaf 189
adepth of 30 feet. By means of screw con-veyors, the cement was conveyed to the four12-sack weighing cement batchers, one lo-cated above each mixer hopper. The ce-ment was weighed and discharged by handinto the hopper along with the three sizesof aggregate. The concrete materials were mixed infour… … GATE DETAIL PARDEE DAMArthur P. Davis, Chief Engineer
Architecture · Building
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