San Francisco : Architect and Engineer, Inc · leaf 45
nd cover method, without interference tosurface traffic by excavation being carried onunder street decking. Pursuant to findings of a survey of subsurfaceuhilities along the proposed routes made by theV/.P.A., all gas mains will be temporarily by-passed during construction. As far as possible,other… … opportunities to consolidate and reorganizetheir duct lines when interferences occur andrearrangement is necessary. Although some of San Franciscos downtownstreets are congested with underground utili-ties, space under the car tracks where thesubways will be located is comparatively free.ROLLING…
Architecture · Building
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