HYDROLOGY OF NEW YORK 



323 



feet per second, as measured by the Lake Survey, gives 1.13 cubic 

 feet per secoud per square mile. 



These figures are for the minimum discharge — for years, or 

 cycles of years, of average rainfall, the runoff will be more. 



RUNOFF OF OTHER STREAMS OF NEW YORK 



Aside from Niagara river, comparatively little definite informa- 

 tion as to the runoff of streams in NeAY York was available before 

 1898. Rather singularly, aside from gagings made by John B. 

 Jervis in 183,j of Madison and Eaton brooks, the State of New 

 York had never made any gagings, although one might suppose 

 that in view of its development of an extensive canal system 

 earlier than this it would have investigated this important branch 

 of hydrology. The few streams gaged in New York before 1898 

 are as follows : 



Streams gaged before 1898. Measurements of Croton river have 

 been made by the City of New York since 1868. Measurements of 

 Oatka creek, a tributary of Genesee river, were made for the 

 Warsaw Waterworks Company from April, 1890, to November. 

 1892. Genesee river at Mount Morris was also gaged from Sep- 

 tember, 1893, to March, 1897, and this stream has been gaged at 

 Rochester by the City Engineer from March, 1893 to 1904. Genesee 

 river was also gaged for a short time at Mount Morris in 1890. 

 Hemlock lake, a tributary of Genesee river, was gaged by the 

 Rochester Waterworks for the years 1SS0-1891, inclusive. The 

 Hudson river has been measured at Mechanicville from October, 

 1887, to 1904. A record of the water drained from Skaneateles 

 lake has been kept by the Canal Department of the State for a good 

 many years, but precise measurements have only been made since 

 March, 1S95. at which time a weir was established at Willow 

 Glen, one and one-half miles below the foot of the lake. These 

 measurements have been made by the city of Syracuse. The Nor- 

 manskill, flowing into the Hudson river at Kenwood, was gaged 

 at French Mills by the Water Department of Albany, from June 

 1, to December 1, 1891. Kinderhook creek was also gaged by the 

 Albany Water Department at East Nassau and at Wilson's dam 

 from July, 1893, until December, 1894. Quackenkill creek was 

 gaged by the Troy Water Department from January to December, 



