Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 134
te pipe under difficulties. Excavation 54 inches wideand 23 eet deep for 33-inchReinforced concrete pipe sew-er in an alley 10 feet wide. avated material can be used for backfilling over the com-leted pipe which follows the excavation very closely. Where strata of sand and gravel were encountered… … Laying- 30-inch concrete sew-er pipe in trench 12 feetdeep. inabling the men to work therein and lay the pipe as inirdlnary moist sand trench.One alley ten feet wide where the trench Is 23 feet deepnd .^4 inches wide and the space between the ditoh andhe houses and fences about 33 Inches wide the…
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