T.A. Gillespie Company, engineers and contractors - water works and pipe lines, railroad and tunnel construction, hydroelectric plants. (1912) (14758601064)

Identifier: tagillespiecompa00tagi (find matches)
Title: T.A. Gillespie Company, engineers and contractors : water works and pipe lines, railroad and tunnel construction, hydroelectric plants.
Year: 1912 (1910s)
Authors: T.A. Gillespie Company.
Subjects: Pipe Pipe, Steel
Publisher: New York : T.A. Gillespie Co.
Contributing Library: Columbia University Libraries
Digitizing Sponsor: The Durst Organization



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ENGINEERS AND CONTRACTORS
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THE T. A. GILLESPIE COMPANY CONTRACT No. 12RONDOUT SIPHON, BOARD OF WATER SUPPLY, CITY OF NEW YORK \X ork on this contract was begun in June, 1908, and the entire contract will be completed early in 1912. The work consists of eight shafts varying in depth from 375 feet to 710 feet, a concrete lined pressuretunnel 14 _> feet finished diameter, and 4 j miles long, together with a concrete lined tunnel on the hydraulicgradient. 17 feet high. 13 feet 4 inches wide, 3,340 feet long, and two short stretches of concrete conduit. Shaft No. 4 on this contract, which is 498 feet deep, was sunk with great difficulty, owing to the pres-ence of large quantities of sulphur water, which was encountered first at a depth of 200 feet. At a depth of260 feet the flow was 900 gallons per minute, practically all of which was sulphur water. In the excavationof the tunnel from the foot of the shaft as high as 2,000 gallons per minute had to be taken care of at a pres-sure of 95 pounds per square inch. In