Souhegan River Site 15 Dam
Souhegan River Site 15 Dam is an earth dam located in Hillsborough, New Hampshire, built in 1963. It carries a Significant hazard potential classification and has a fair condition assessment.
About Souhegan River Site 15 Dam
The primary purpose of Souhegan River Site 15 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 Nh Des Water Division (state). It impounds the King Brook near Wilton.
The dam stands 13 feet tall and stretches 305 feet across, creates a reservoir covering 69 acres, has a maximum storage capacity of 708 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1963, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 11/16/2021.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Wilton |
| River/Stream | King Brook |
| Coordinates | 42.79830, -71.80550 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 305 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 708 acre-ft |
| Max Storage | 708 acre-ft |
| Normal Storage | 74 acre-ft |
| Surface Area | 69 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | NH DES WATER DIVISION |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/16/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00263 |
| Federal ID | NH00263 |
| More Info | State Dam Safety Program |