Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 293
t of driving per foot from10 to 15 per cent. There was a further saving to the cityin expedition of the work and in early release of equip-ment for use elsewhere. From the south portal. 13,500 feet of tunnel were driven,and from the north portal, 13,370 feet. The average rateof progress at the… … Completed Aqueduct, from Intake to Haiwee Reservoir,miles—the Aqueduct is not covered. of IVilalinu lUiil double the total area of the city of LosAngeles. Worlds recoids for speed, efficiency and economy weremade by\he tunnel drivers on the acqueduct. The Ameri-can record for hard rock tunnel…
Architecture · Building · Construction industry · Engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
