HYDROLOGY OF NEW YORK 



2S1 



The catchment area of Sauquoit creek above its mouth is 67 

 square miles. 



Oriskany creek. This stream rises in the northern part of Mad- 

 ison county, flowing northerly across Oneida county into the 

 Mohawk river at Oriskany. The catchment area above its mouth 

 is 146 square miles. There is considerable water power developed 

 on Oriskany creek. 



Comparison of the flow over tioo dams on Oriskany creek. This 

 -creek is of slight interest because, in connection with the work 

 done for the Board of Engineers on Deep Waterways, two gaging 

 stations were established at widely varying types of dams and it 

 was found that even in winter fairly comparable results could be 

 obtained by gagings over such dams. The first station was estab- 

 lished at the State dam at Oriskany, where water is diverted for 

 the use of the Erie canal. The catchment area at this point is 141 

 square miles. During the navigation months, a record was kept 

 of the gate openings, together with daily observations of the differ- 

 ence in water surface above and below gates. Outside of the 

 navigation months, the feeder gates were entirely closed and the 

 record is for flow over the dam only. The second station was 

 established at Coleman, a couple of miles above the first, where 

 the catchment area is 141 square miles. 



The object of establishing two stations on Oriskany creek was 

 to determine whether on dams of somewhat different forms, but 

 with nearly the same catchment area, the flows could be gaged 

 close enough to give comparable figures. Space will not be taken 

 to give the method of computation used in detail, but those inter- 

 ested can refer to the report to the Board of Engineers on Deep 

 Waterways for an extended account of the method used. For 

 present purposes it is sufficient to refer to the accompanying tabu- 

 lation, in which are given the flows at the two stations for the 

 months from October. 1898, to February. 1899, inclusive. During 

 the winter months, December to February, the ice was kept clear 

 from the crest of both dams. The results show good agreement 

 and indicate that even when one of the cases is complicated by 

 discharge through a number of water wheels, as at the second 



