Lake Valhalla Dam
Lake Valhalla Dam is a concrete dam located in Putnam County, New York, built in 1928. It carries a Significant hazard potential classification and has a poor condition assessment.
About Lake Valhalla Dam
The primary purpose of Lake Valhalla Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Valhalla Highlands Association, Inc. (private). It impounds the Tr-clove Creek near Glenham.
The dam stands 19 feet tall and stretches 235 feet across, creates a reservoir covering 31 acres, has a maximum storage capacity of 208 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1928, 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 07/31/2024.
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Location
| State | New York |
| County | Putnam |
| Nearest City | Glenham |
| River/Stream | Tr-clove Creek |
| Coordinates | 41.48083, -73.92806 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 235 ft |
| Year Completed | 1928 (98 years old) |
Storage & Hydraulics
| NID Storage | 260 acre-ft |
| Max Storage | 208 acre-ft |
| Normal Storage | 260 acre-ft |
| Surface Area | 31 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 147 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Valhalla Highlands Association, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 07/31/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00012 |
| Federal ID | NY00012 |
| More Info | State Dam Safety Program |