HYDROLOGY OF NEW YORK 



589 



permanent, continuous power to be realized from a reservoir stor- 

 ing 7,370,000,000 cubic feet and located in the Mount Morris gorge 

 would be 18,327 gross horsepower. 



In regard to the increase in waterpower, the effective value of 

 the storage will be the amount of permanent power above the low- 

 water power of the stream. As already stated, the total per- 

 manent power for the unregulated stream is 67^7 gross horse- 



Fig. 40 Section of daru and gate-house as proposed for Genesee river at 

 Portage. 



power. The gain due to the storage is, therefore, 11,600 gross 

 horsepower. Assuming a price of $10 per gross horsepower, we 

 reach an annual return from the increased power of $116,000 ; but 

 the Mount Morris reservoir is estimated in 1904 to cost $3,500,000, 

 although ten years ago it was estimated at $2,785,000. Using the 

 figure of the estimate of ten years ago, and assuming the project 

 carried out by a private company with money at 5 per cent, the 

 annual interest on the investment is $139,250 — a sum $23,250 in 

 excess of the probable annual income w T hen all the power created 

 shall have been brought into use; but there sho\ild be a sinking, 



