Onteora Pond Dam
Onteora Pond Dam is an earth dam located in Greene County, New York, built in 1924. It carries a Significant hazard potential classification and has a poor condition assessment.
About Onteora Pond Dam
The primary purpose of Onteora Pond Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Onteora Park Association (private). It impounds the Allen Brook near Tannersville.
The dam stands 18 feet tall and stretches 390 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 115 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1924, the structure is over a century 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 07/20/2022.
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Location
| State | New York |
| County | Greene |
| Nearest City | Tannersville |
| River/Stream | Allen Brook |
| Coordinates | 42.21472, -74.15111 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 390 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 115 acre-ft |
| Max Storage | 115 acre-ft |
| Normal Storage | 115 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,075 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | ONTEORA PARK ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 07/20/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00272 |
| Federal ID | NY00272 |
| More Info | State Dam Safety Program |