HYDROLOGY OF NEW YORK 



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is intended to run to the village of Canton, 10y 2 miles from Han- 

 nawa Falls, and finally to the city of Ogdensburg, 19 miles 

 farther. 



It is also intended to utilize a portion of the power to be de- 

 veloped here for grinding wood-pulp, and accordingly a ground 

 wood-pulp plant of 100 tons capacity per day is included. 



In the grinder room two pairs of 4000-horsepower water-wheels, 

 built by the S. Morgan Smith Company, are placed on horizontal 

 shafts and supplied with water from two independent 10-foot pen- 

 stocks, discharging into a common tailrace. 1 From the foregoing 

 it appears that in 1901 about 9000 horsepower is developed at this 

 station, although the writer is unable to state whether or not the 

 full capacity of the pulp-grinding machinery is utilized. These 

 works were designed by W. C. Johnson. 



Waterpower of Erie canal 



When the Erie canal was first constructed the policy was 

 adopted of leasing the so-called surplus water for power pur- 

 poses. Under the terms of the act of 1825 leases were made 

 during 1826 and subsequent years to a number of persons at 

 Black Rock, Lockport and other localities. 



Power at Black Rock. The granting of these leases and the 

 resultant development of large manufacturing interests at several 

 points have raised certain economic questions which will now be 

 briefly discussed. The waterpower at Black Rock, for which 

 several leases were granted, will be first mentioned. This power 

 is created by the difference in level between the water in the Erie 

 canal and the Black Rock harbor and that in the Niagara river 

 outside the harbor wall, this difference of water-level amounting 

 to from 4 feet to 4.5 feet. As measured in the spring of 1896. at 

 a point near the ship lock, it was about 4 feet. According to 

 the report of the Assembly Committee of 1870, there were 

 formerly ten mills in operation at Black Rock, using 2744 second- 

 feet of water. The power developed by these mills, and all 

 operating at full capacity, is estimated at not exceeding 520 

 horsepower. Owing to the decline of the milling business in 



Abstract from paper, Water Power Development at Hannawa Falls, by 

 W. C. Johnson. Trans. Aim Soe. of Mecb. Engrs.; Vol. XXIII. 



