HYDROLOGY OF NEW YORK 



635 



carried along through each water year, to the end of November 

 1899. 



This computation shows that for a storage of 18 inches on 

 the catchment area and a uniform outflow of 775 cubic feet per 

 second the total waste in the twelve-year period would have 

 been only 13.81 inches. A similar computation has been made 

 for a storage of 13.5 inches and uniform outflow of 650 cubic 

 feet per second, in which the waste would have been 55.36 inches* 

 amounting to a mean waste per year of 4.61 inches. 



The distance from Hadley to proposed site of Schroon valley 

 barrage at Tumblehead falls — measured along the thread of 

 Hudson and Schroon valleys — is about 29 miles. Of this about 

 14 miles is in Schroon valley. The village of Warrensburg, 

 with a population of about 1000 in 1900, lies on Schroon 

 river, three miles above its mouth. At and in the vicinity of 

 this place waterpower to the extent of 1627 net horsepower 

 -(2167 gross horsepower) has been developed on Schroon river. 

 The largest block of power at a single point is at the dam of 

 the Schroon River Pulp Company, one and one half miles below 

 Warrensburg, where 1086 net horsepower are in use. Owing to 

 the equalizing effect of Schroon lake, these powers are all fairly 

 permanent except at the pulp mill, which is sometimes short of 

 water in late summer and fall months. 



The water-surface elevation of Schroon river at its mouth, 

 near Thurman, is approximately 620 + T. W. At Tumblehead 

 falls the elevation is about 780 - T. W. There is, therefore, a 

 total fall of 160 feet between Tumblehead falls and mouth of 

 stream. Of this 39 feet is included in the dams at Warrensburg 

 village and the Schroon River Pulp Company's power, leaving 

 121 feet still undeveloped. It seems very desirable, in case 

 Schroon valley reservoir is constructed, that the waterpower 

 possibilities of the stream be preserved. A uniform outflow of 

 775 cubic feet per second would yield, on 121 feet fall, 10,639 

 gross horsepower. 



In order to preserve present waterpowers and ultimately 

 utilize the undeveloped fall, it would be necessary to let the 

 water discharged from the reservoir at Tumblehead falls flow 

 •down the present channel of Schroon river to a diversion weir, to 



