Ex ICtbrts SEYMOUR DURST When you leave, please leave this book Because it has been said "Ever'thinQ comes t him who waits Except a loaned book." Avery architectural and Fine ar is Library GlU miles of the New York State Barge Canal, from New- ark, N. Y., to Palmyra, N. Y., and include the construction of two locks, the masonry work for ten high- way bridges and the superstructure of four highway bridges, guard gates, two abutments and one pier for guard gates. Also, the removal of 120 houses and buildings at Newark and Palmyra. The principal construction quantities are as follows: Excavation 4,800,000 cubic yards Concrete 80,000 cubic yards Forming Embankment 400,000 cubic yards Wash Wall 77,000 cubic yards Structural Steel 725,000 pounds Wakefield Wooden Sheet Piling 1 ,000,000 feet B. M. 33 THE T. A. GILLESPIE COMPANY Steam Shovel Cut. Newark, N. Y., New York State Barge C anal 1911. 34 ENGINEERS AND CONTRACTORS ENGINEERS AND CONTRACTORS T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY CONTRACT No. 1 2 RONDOUT 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 pressure tunnel 14' _> feet finished diameter, and 4 'j miles long, together with a concrete lined tunnel on the hydraulic gradient. 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 of 260 feet the flow was 900 gallons per minute, practically all of which was sulphur water. In the excavation of 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 fact, the average amount of water for two years at this point in the tunnel was 1,500 gallons per minute, and the sulphur contents made it very difficult to get men to do the work. A pumping plant was installed near the foot of the shaft consisting of three 6-inch, 6-stage, 600-gallon V\ orthington centrifugal pumps, operated by General Electric motors, and Cameron horizontal pumps, oper- ated by steam and compressed air, and having a total capacity of 5,200 gallons per minute, discharged at the top of the shaft. An emergency water lock of concrete, with a very heavy timber door was also installed in the tunnel between the pumping plant and the main inflow of water. November 30, 1910, this lock was brought into service due to a surface explosion, which cut off the power to the entire pumping plant for a short time. When pumping operations were again resumed, a dis- rge to the surface of 4,800 gallons per minute was maintained until the heading was unwatered and the normal flow again encountered. The principal construction quantities were as follows: Shaft Excavation 45,000 cubic yards Tunnel Excavation 300,000 cubic yards Concrete in Shafts and Tunnels 140,000 cubic yards Portland Cement 235,000 barrels 40 ENGINEERS AND CONTRACTORS Ten Duplex Corliss Compound Steam, Two-stage Air Compressors, developing over 4,000 H. P. and delivering 24,000 cubic feet of free air per minute, compressed to I 10 pounds gauge. Contract No. 12. Catskill Aqueduct, for the Board of Water Supply, City of New York— 1909. THE T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS Dynamos in connection with Air Com- pressor Plant. Catskill Aqueduct, Contract No. 12, for the Board of Water Supply, City of New York 1909. Four 375 H. P. Heine Safety Boilers. Four 250 H. P. Stirling Water Tube Boilers in connection with Air Compressor Plant. Catskill Aqueduct, Contract No. 12, for the Board of Water Supply, City of New York 1909. 43 ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY POWER PLANT FOR THE ST. LAWRENCE RIVER POWER COMPANY The main Power Plant was built under a contract made in 1898, and called for the construction of a canal from the St. Lawrence River to the Grasse River; of a power house with its foundations, forebay and tail race; of all highways and bridges made necessary by reason of the canal; and for the construction of a railroad from Massena Springs to the Power House, a distance of about 3 miles, in which are two steel bridges, viz., one across the Racquette and one across the Grasse River. The construction quantities included 6,000,000 cubic yards of Excavation; 35,000 cubic yards of Con- crete. This contract was completed in 1902. May 28, 1910, an additional contract was entered into for the construction of an Ice Sluice and Dam adjoining the Power House of the St. Lawrence River Power Company. This work was completed in the Spring of 191 I. 48 I ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS S5 THE T. A. GILLESPIE COMPANY 56 ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY 59 60 ENGINEERS AND CONTRACTORS Riveted Steel Pipe, 50-inch diameter, Minneapolis. Minn Laying pipe across Mississippi River 1897. 62 ENGI NEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS THE T. A . GILLESPIE COMPANY ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPANY ENGINEERS AND CONTRACTORS THE T. A. GILLESPIE COMPAN ENGINEERS AND CONTRACTORS East Jersey Water Company 48-inch Steel Conduit Vertical and Horizontal Curves, at Miller's Hill 1891. 71 DBS1GNBD, BNCRAVBD \M> PRINTED EDWARD STBRN * CO., INC. ■ ■■Ill Mil i PHI \ NEW YORK