Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 133
56 33-inch reinforced concrete pipe 5.00 48-inch reinforced concrete pipe 6.05 Manholes 50.00 Excavation. The materials encountered in excavation were clay, sandand gravel, lilue sticky clay and quicksand, in all about110,000 cubic yards. The clay was excavated with a Par-sons Trench Excavator… … Laying 4S-inch Reinforced concrete pipe. car with two cable drums for lowering into the trench thetwo buckets each of 5-8 yard capacity used for taking upthe earth; this car runs on steel rails on top of a framework situated on top of the ditch and straddling it and be-*ing itself on wheels running…
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