Warren Mill Dam
Warren Mill Dam is an earth dam located in Hunterdon County, New Jersey, built in 1916. It carries a High hazard potential classification and has a poor condition assessment.
About Warren Mill Dam
The primary purpose of Warren Mill 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 Warren Glenn Investments, Llc (private). It impounds the Musconetcong River near Pohatcong.
The dam stands 38 feet tall and stretches 330 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 117 acre-feet, and collects water from a drainage area of 148 square miles. Completed in 1916, 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 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 01/04/2024.
At 38 feet, this dam is taller than 85% of dams nationwide.
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 | Hunterdon |
| Nearest City | Pohatcong |
| River/Stream | Musconetcong River |
| Coordinates | 40.63622, -75.12027 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 330 ft |
| Year Completed | 1916 (110 years old) |
Storage & Hydraulics
| NID Storage | 117 acre-ft |
| Max Storage | 117 acre-ft |
| Normal Storage | 28 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 148 sq mi |
| Max Discharge | 12,150 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Warren Glenn Investments, LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 01/04/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00765 |
| Federal ID | NJ00765 |
| More Info | State Dam Safety Program |