Lower Wilson Pond Dam
Lower Wilson Pond Dam is an earth dam located in Cheshire County, New Hampshire, built in 1925. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lower Wilson Pond Dam
The primary purpose of Lower Wilson Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Swanzey (local government). It impounds the Minnewawa Brook near Swanzey.
The dam stands 18 feet tall and stretches 120 feet across, creates a reservoir covering 80 acres, has a maximum storage capacity of 560 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1925, the structure is over a century 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 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 03/23/2021.
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Location
| State | New Hampshire |
| County | Cheshire |
| Nearest City | Swanzey |
| River/Stream | Minnewawa Brook |
| Coordinates | 42.89690, -72.26360 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 120 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 560 acre-ft |
| Max Storage | 560 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 80 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF SWANZEY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/23/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00206 |
| Federal ID | NH00206 |
| More Info | State Dam Safety Program |