Silver Mine Lake Dam
Silver Mine Lake Dam is an earth dam located in Orange County, New York, built in 1934. It carries a Significant hazard potential classification and has a poor condition assessment.
About Silver Mine Lake Dam
The primary purpose of Silver Mine Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nysoprhp - Palisades Interstate Park Commission (state). It impounds the Queensboro Brook near Fort Montgomery.
The dam stands 36 feet tall and stretches 445 feet across, creates a reservoir covering 84 acres, has a maximum storage capacity of 1,180 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1934, 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 10/04/2023.
At 36 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | New York |
| County | Orange |
| Nearest City | Fort Montgomery |
| River/Stream | Queensboro Brook |
| Coordinates | 41.29333, -74.05278 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 445 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 1,180 acre-ft |
| Max Storage | 1,180 acre-ft |
| Normal Storage | 908 acre-ft |
| Surface Area | 84 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | NYSOPRHP - PALISADES INTERSTATE PARK COMMISSION |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 10/04/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00082 |
| Federal ID | NY00082 |
| More Info | State Dam Safety Program |