Central Nyack Dam
Central Nyack Dam is a concrete dam located in Rockland County, New York, built in 2012. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Central Nyack Dam
The primary purpose of Central Nyack Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Town Of Clarkstown (local government).
The dam stands 12 feet tall. Completed in 2012, the structure is relatively new.
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 |
| Coordinates | 41.08806, -73.93889 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Year Completed | 2012 (14 years old) |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| 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 | NY16258 |
| Federal ID | NY16258 |
| More Info | State Dam Safety Program |