Long Pond Dam
Long Pond Dam is an earth dam located in Rensselaer County, New York, built in 1918. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Long Pond Dam
The primary purpose of Long Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nys Parks, Recreation & Historic Preservation (state). It impounds the Tr-quacken Kill near Grafton.
The dam stands 9 feet tall and stretches 200 feet across, creates a reservoir covering 115 acres, has a maximum storage capacity of 1,702 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1918, 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 01/05/2024.
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 | Rensselaer |
| Nearest City | Grafton |
| River/Stream | Tr-quacken Kill |
| Coordinates | 42.78221, -73.44789 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 200 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 1,702 acre-ft |
| Max Storage | 1,702 acre-ft |
| Normal Storage | 1,702 acre-ft |
| Surface Area | 115 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 33 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | NYS PARKS, RECREATION & HISTORIC PRESERVATION |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/05/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00908 |
| Federal ID | NY00908 |
| More Info | State Dam Safety Program |