65S 



NEW YORK STATE MUSEUM 



ment. Making some allowance for increased depth of water in 

 Grasse river between the power staftion and its mouth, when 

 receiving the tail-water, and also some allowance for inclination 

 of the water surface of the head canal, it is considered that a per- 

 manent power of about 40 feet will be obtained. 



The work of constructing the canal and preliminary work on 

 the foundations of the power-house was started in 1897, at which 

 time it was expected that the work would be completed in 1899. 

 The St Lawrence Power Company, by whom the work has been 

 done, was organized under the laws of New York with a capital 

 stock of $6,000,000. 



For the present, work upon the canal was completed in 1903. 

 It has an average depth of 18 feet and a surface width of 200 

 feet. It is constructed throughout its entire length in excava- 

 tion and is approximately straight throughout. At the head of 

 the canal there is a slight promontory, which protects it from ice 

 and drift in the St Lawrence river. 



At the Massena end, with the foundations carried to rock, a 

 power-house designed by John Bogart of Xew York and Messrs 

 Kincaid, Waller and Manville of London, has been constructed. 

 It will be nearly 700 feet long when completed, with a width of 

 150 feet. Victor turbines to the extent of 42,000 horsepower have 

 been installed. The wheels are controlled by an electric governor 

 in the power-house. The exciter wheels are 27 inches in diameter, 

 two to each exciter, discharging through one draft-tube and 

 operating at 275 revolutions per minute. 



The dynamos are of 6000 horsepower, 2200 volts, 3000 alter- 

 nations, 3-phase revolving field type, with external armature. 

 The speed is 150 revolutions per* minute. The efficiency at full 

 load 9G per cent. The heating at full load, continuous, 35 degrees 

 rise. Weight of revolving element, 80,000 pounds, and total 

 weight of the dynamos, 350,000 pounds. 



The switchboards for the alternating current machines and 

 for the feeders are operated electro-pneumatically, and for the 

 exciters a standard, direct current switchboard has been installed, 

 with hand-operated switches. 



In a letter from Mr Bogart, consulting engineer to the com- 

 pany, under date of March 23, 1904, it is stated that the Pitts- 



