Wampus Lake Reservoir Dam
Wampus Lake Reservoir Dam is an earth dam located in Westchester County, New York, built in 1940. It carries a Significant hazard potential classification and has a poor condition assessment.
About Wampus Lake Reservoir Dam
The primary purpose of Wampus Lake Reservoir Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Westchester County Dept Of Parks & Recreation (local government). It impounds the Wampus River near Armonk.
The dam stands 10 feet tall and stretches 65 feet across, creates a reservoir covering 38 acres, and has a maximum storage capacity of 180 acre-feet. Completed in 1940, 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 01/26/2024.
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Location
| State | New York |
| County | Westchester |
| Nearest City | Armonk |
| River/Stream | Wampus River |
| Coordinates | 41.14500, -73.72583 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 65 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 180 acre-ft |
| Max Storage | 180 acre-ft |
| Normal Storage | 140 acre-ft |
| Surface Area | 38 acres |
| Max Discharge | 68 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | WESTCHESTER COUNTY DEPT OF PARKS & RECREATION |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 01/26/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY01332 |
| Federal ID | NY01332 |
| More Info | State Dam Safety Program |