NEW YORK STATE MUSEUM 



Floods in Canisteo river. This stream is subject to severe 

 Hoods from which the city of Hornellsville has suffered greatly 

 iu the past. The fall of Canisteo river for two miles above the 

 mouth of Cauacadea creek is 2 feet per mile, while below the 

 mouth of that creek it is 8 feet per mile. Above the mouths of 

 Bennett and Stephens creeks the fall is 3-J feet per mile and 10 

 feet per mile below their mouths. These facts illustrate the effect 

 of torrential tributaries of a stream in flattening slopes above 

 their confluence and increasing them below. 



Flood in Cohocton river. Conditions similar to those stated 

 for the Canisteo river apply on the Cohocton river. 



Floods in Delaware river. Very little is known about flood- 

 flows in this stream, although they are undoubtedly high, in many 

 cases no doubt approximating from 70 to 80 cubic feet per second 

 per square mile. The valleys are narrow and do not, generally 

 speaking, offer any great opportunity for water storage. 



Summary of information as to maximum flows in Neiv York. 

 Concluding the subject of flood-flows in New York, on Oswego 

 river and tributaries, where there is extremely large lake pond- 

 age, the flood-flows do not exceed G to 8 cubic feet per second 

 per square mile. 



On the Hudson river, with considerable lake pondage, the 

 extreme floods are 15 to 16 cubic feet per second per square mile. 



On the Black river, below Carthage, flood-flows of 16 to 20 cubic 

 feet per second per square mile are about the maximum ; above 

 Lyon Falls, 25 to 40 cubic feet per second per square mile, and 

 in the tributaries, generally from 30 to 60 cubic feet per second 

 per square mile. 



On the Mohawk river, with sleep torrential tributaries, floods 

 are from 20 to 50 cubic feet per second per square mile, and in the 

 upper sections they may be as high as about 60 cubic feet per 

 second per square mile. 



On the Genesee river the extreme maximum thus far observed 

 at Rochester, above which place there is an extensive pondage area, 

 is 18 to 24 cubic feet per second per square mile, while at Mount 

 Morrifi and Portage floods rise to over 40 cubic feet per second 

 per square mile. On this latter portion of the stream a possible 

 maximum may be expected of 60 to 70 cubic feet per second per 

 square mile. 



