616 



NEW YORK STATE MUSEUM 



large. Gagings were begun on Salmon river in November, 1898. 

 The record shows that in April, 1899, 12.8 inches ran off, and 

 that the total runoff of the storage period, December, 1898, to 

 May, 1899, inclusive, was 25.2 inches. The writer had some 

 doubt about this record at the time it was taken, although later 

 observations seem to indicate that it may have been correct. 



The runoff of the east branch of Fish creek at Point Rock begun 

 in September, 1898, and continued until May, 1899, is also very 

 large. The record shows that in April, 1899, 8.0 inches ran off. 

 The writer's recollection is that the flow was larger than appears 

 in the record both on Fish creek and Salmon river, but was 

 cut dowu somewhat because of the unwillingness to assume that 

 these large runoffs were right. Further consideration seems to 

 indicate that they may perhaps have been true, and it is unfor- 

 tunate that gagings have not been kept up continuously from 

 that time to the present in order to settle this question of large 

 runoff. The catchment of the east branch of Fish creek joins that 

 of Salmon river on the east. 



The figures given in the Deep Waterways report show that the 

 proposed Salmon river reservoir will have a flood area of water 

 surface of 8.46 square miles, storing with this water surface about 

 7,500,000,000 cubic feet, or storing temporarily on the catchment 

 area 16.95 inches. The tables also show that 300 cubic feet per 

 second may be delivered to the canal during the navigation season 

 and still leave some surplus in the reservoir. These computations 

 are on the basis of the Hudson river gagings; in case it turns out 

 later on that the flows of the Salmon river are larger than those of 

 the Hudson, more than 300 cubic feet per second can be furnished. 



In designing the reservoirs for the supply of the proposed deep 

 waterways it was deemed desirable that there be considerable con- 

 tingency; thus, in the Salmon river reservoir, the quantity still in 

 the reservoir at the end of 1895 is 5.19 inches on the catchment 

 area, or about 2,250,000,000 cubic feet. 



An estimate of the cost of this reservoir and of the other works 

 on the deep waterways was made in detail. The total cost of the 

 Salmon river reservoir was estimated in 1899 at $1,350,000. Prob- 

 ably, in 1904, it would cosl about 25 per cent more, or perhaps 

 11,678,500. At the latter rate, the cost per 1,000,000 cubic feet of 

 storage becomes $233, 



