Woodlands Lake Dam
Woodlands Lake Dam is a rockfill dam located in Westchester County, New York, built in 1840. It carries a Significant hazard potential classification.
About Woodlands Lake Dam
The primary purpose of Woodlands Lake 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 Saw Mill River near Ardsley.
The dam stands 20 feet tall and stretches 200 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 87 acre-feet. Completed in 1840, the structure is one of the older dams in the region, with over a century and a half 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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/17/2022.
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Location
| State | New York |
| County | Westchester |
| Nearest City | Ardsley |
| River/Stream | Saw Mill River |
| Coordinates | 41.02389, -73.84528 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
| Year Completed | 1840 (186 years old) |
Storage & Hydraulics
| NID Storage | 87 acre-ft |
| Max Storage | 87 acre-ft |
| Normal Storage | 87 acre-ft |
| Surface Area | 13 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | WESTCHESTER COUNTY DEPT OF PARKS & RECREATION |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 08/17/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY13574 |
| Federal ID | NY13574 |
| More Info | State Dam Safety Program |