Identifier: architectenginee11935sanf (find matches)
Title: Architect and engineer
Year: 1905 (1900s)
Authors:
Subjects: Architecture Architecture Architecture Building
Publisher: San Francisco : Architect and Engineer, Inc
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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e center. The broad ap-proaches are to have four traffic lanes. Perfect ventilation is assured through anelaborate electric ventilating system. Eighthuge fans, in reinforced concrete stationsat the portals, will pump 1,500,000 cubicfeet of air a minute and eight exhaust fanswill pull out an equal amount of foul air. Illumination in the tunnels will be fur-nished by powerful electric lights locatedevery 1500 feet. Romaine W. Myers, con-sulting electrical engineer, has worked outlight transition structures which will adjustthe eye of the motorist to the difference be-tween sunlight and artificial light at bothportals. The tunnels are to be concrete lined.Trucks, known as batch wagons, are em-ployed in transporting batches of dry mixedmaterial from the mixing plant at Emery-ville to the project, where water is addedand the concrete is poured into the forms. There are 11 boulevard and railroadstops on the 5-mile truck run, all calling forefficient brake action when a loaded truck ^ 57 ►
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t^Ti^f. SPEHD WORK ON HUGE CONTRA COSTA TUNNEL PROJECTHere is a section ot the Broadway low-level tunnel project, near Oakland,California, where a new traffic link between Alameda and Contra CostaCounties is being constructed, with two huge one-way tunnels, each j,108feet long is rolling through city traffic like a passen-ger car. And there is a steep drop fromthe Tunnel Road to the project. Numerous trucks also are in action onthe actual project, hauling steel and cement.Others are piled high with timbers orare being used to haul gravel and cementdown into the bed of Temescal creek, forthe building of the spillway below thedam. This big East Bay highway undertakingrepresents many years of planning by theAlameda-Contra Costa highway district.Cost of the Broadway low level tunnelproject will be $3,683,931. Of this amountthe PWA put up 30 per cent. The State ofCalifornia contributed $300,000 andoledged $400,000 additional. The high-way district issued $2,378,000 worth ofbonds. THE ARCHI

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