Long Pond Dam
Long Pond Dam is an earth dam located in Westchester County, New York, built in 1936. It carries a Significant hazard potential classification and has a poor condition assessment.
About Long Pond Dam
The primary purpose of Long Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Amy And Joel Dworetzky;town Of North Castle;teresa And Kenneth Gleicher;victoria And Arturo Maceira (private). It impounds the Mianus River near North Castle.
The dam stands 40 feet tall and stretches 600 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 174 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1936, the structure is well-established, with more than 75 years of service.
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 03/31/2023.
At 40 feet, this dam is taller than 87% of dams nationwide.
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Location
| State | New York |
| County | Westchester |
| Nearest City | North Castle |
| River/Stream | Mianus River |
| Coordinates | 41.14639, -73.67083 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 600 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 174 acre-ft |
| Max Storage | 174 acre-ft |
| Normal Storage | 115 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 222 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | AMY AND JOEL DWORETZKY;TOWN OF NORTH CASTLE;Teresa and Kenneth Gleicher;Victoria and Arturo Maceira |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 03/31/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00115 |
| Federal ID | NY00115 |
| More Info | State Dam Safety Program |