Assunpink #8 Dam
Assunpink #8 Dam is an earth dam located in Mercer County, New Jersey. It carries a High hazard potential classification and has a poor condition assessment.
About Assunpink #8 Dam
The primary purpose of Assunpink #8 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Hamilton Township (local government). It impounds the Pond Run.
The dam stands 20 feet tall and stretches 1,450 feet across, creates a reservoir covering 13 acres, has a storage capacity of 26 acre-feet, and collects water from a drainage area of 3 square miles.
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 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 05/03/2023.
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 Jersey 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 Jersey |
| County | Mercer |
| River/Stream | Pond Run |
| Coordinates | 40.21253, -74.67525 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 1,450 ft |
Storage & Hydraulics
| NID Storage | 26 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Hamilton Township |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 05/03/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00543 |
| Federal ID | NJ00543 |
| More Info | State Dam Safety Program |