File:Pacific service magazine (1918) (14596944107).jpg

Identifier: pacificservicema1019paci (find matches)
Title: Pacific service magazine
Year: 1912 (1910s)
Authors: Pacific Gas and Electric Company
Subjects: Pacific Gas and Electric Company Electric utilities Electrical engineering Public utilities
Publisher: San Francisco : Pacific Gas and Electric Company
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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he plan was to couple the pipe to-gether on one side of the shore and then by means of arope cable at-tached to adonkey engineon the otherside to pull thepipe across. Aweek beforethe pipe wassubmerged theAmericanDredging Com-pany dredged atrench in thebed of thecanal 30 feetbelow loww^ater to re-ceive the pipe. Piles were driven alongthe west line of the trench at frequentintervals so as to guide the pipe intothe trench, otherwise the strong tidewould pull the pipe out of place. A diverwas then employed to examine the trenchand he reported it ready to receive thepipe. The whole line of 500 feet in lengthwas screwed together on skids fitted ona greased slide in a vacant piece of prop-erty on the Oakland shore. At each jointa special sleeve was placed and filled withlead,taking about 100 pounds to the sleeve,to insure perfect tightness and doublestrength. The whole line was then tarredwith a special pipe covering calledfloatine and wrapped with paper cover- Pacific Service Magazine 38!)
Text Appearing After Image:
The main supported by pontoons \\hile Ijcing towed across ing. This operation was repeated threetimes, ending with a coat of tar. The donkey engine on the Alamedashore pulled the entire length of pipeacross by cable, assisted by eight pon-toons which floated over with the pipe.The pipe was then low^ered, the diveragain going down to see if everythingwas ready to backfill. It was found neces-sary to remove portions of the bank oneach side of the channel to allow the pipeto slide into the bottom of the trench.This earth was removed by hydraulicpressure and the pipe sank into its berth.The trench was then filled in by thedredger, so that the main will rest about12 feet below the final bottomlevel of the canal. The main now^ lies in its per-manent bed on the bottom of thecanal. A 45-degree cast-ironbend, lead joint, rests on thecanal bottom at the Oaklandshore. On the Alameda shore the8-inch hydraulic pipe was bentto a 45-degree angle before pipewas pulled across. Forty-six feetof 8-inch

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