Tannersville Reservoir #3 Dam
Tannersville Reservoir #3 Dam is an earth dam located in Greene County, New York, built in 1957. It carries a Significant hazard potential classification and has a poor condition assessment.
About Tannersville Reservoir #3 Dam
The primary purpose of Tannersville Reservoir #3 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Village Of Tannersville (local government). It impounds the Tr-allen Brook near Tannersville.
The dam stands 17 feet tall and stretches 350 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 51 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1957, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 05/20/2024.
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Location
| State | New York |
| County | Greene |
| Nearest City | Tannersville |
| River/Stream | Tr-allen Brook |
| Coordinates | 42.21056, -74.15861 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 350 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | VILLAGE OF TANNERSVILLE |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/20/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY01521 |
| Federal ID | NY01521 |
| More Info | State Dam Safety Program |