Congers Lake Dam
Congers Lake Dam is an earth dam located in Rockland County, New York, built in 1892. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Congers Lake Dam
The primary purpose of Congers Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Clarkstown (local government). It impounds the E Branch Hackensack River near Congers.
The dam stands 8 feet tall and stretches 333 feet across, creates a reservoir covering 112 acres, has a maximum storage capacity of 466 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1892, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 05/07/2025.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The New York dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New York |
| County | Rockland |
| Nearest City | Congers |
| River/Stream | E Branch Hackensack River |
| Coordinates | 41.13611, -73.94222 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 333 ft |
| Year Completed | 1892 (134 years old) |
Storage & Hydraulics
| NID Storage | 466 acre-ft |
| Max Storage | 466 acre-ft |
| Normal Storage | 187 acre-ft |
| Surface Area | 112 acres |
| Drainage Area | 4 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF CLARKSTOWN |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/07/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00972 |
| Federal ID | NY00972 |
| More Info | State Dam Safety Program |