A March 1865 thaw was the worst Genesee flood in Rochester history, and a similar 1913 flood motivated the excavation of the Genesee's rock bed in Downtown Rochester.
 The 1972 Hurricane Agnes flood broke all county historical records, with the most concentrated damage in the Wellsville area.
 The water from Hurricane Agnes caused the only instance where the river's flow exceeded the storage capacity of the reservoir of the Mount Morris Dam, the largest flood control dam east of the Mississippi, and water had to be released from the dam to prevent overtopping of the spillway.
A March 1865 thaw was the worst Genesee flood in Rochester history, and a similar 1913 flood motivated the excavation of the Genesee's rock bed in Downtown Rochester.  The 1972 Hurricane Agnes flood broke all county historical records, with the most concentrated damage in the Wellsville area.  The water from Hurricane Agnes caused the only instance where the river's flow exceeded the storage capacity of the reservoir of the Mount Morris Dam, the largest flood control dam east of the Mississippi, and water had to be released from the dam to prevent overtopping of the spillway.
Genesee River