Ischua Creek Watershed Dam #3
Ischua Creek Watershed Dam #3 is an earth dam located in Cattaraugus County, New York, built in 1966. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Ischua Creek Watershed Dam #3
The primary purpose of Ischua Creek Watershed Dam #3 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Cattaraugus County;cattaraugus County (local government). It impounds the Tr-ischua Creek near Franklinville.
The dam stands 38 feet tall and stretches 1,220 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 646 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1966, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/18/2022.
At 38 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | New York |
| County | Cattaraugus |
| Nearest City | Franklinville |
| River/Stream | Tr-ischua Creek |
| Coordinates | 42.36944, -78.43694 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 1,220 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 646 acre-ft |
| Max Storage | 646 acre-ft |
| Normal Storage | 38 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 4,025 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | CATTARAUGUS COUNTY;Cattaraugus County |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/18/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00551 |
| Federal ID | NY00551 |
| More Info | State Dam Safety Program |