Nashua Canal Dam and Dike is a concrete dam located in Hillsborough, New Hampshire, built in 1886. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 11 ft11 ft tall and 41 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Nashua Canal Dam and Dike
The primary purpose of Nashua Canal Dam and Dike is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of Nashua (local government). It impounds the Canal System near Nashua.
The dam stands 11 feet tall and stretches 41 feet across, creates a reservoir covering 42 acres, has a maximum storage capacity of 325 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1886, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/28/2020.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Nashua |
| River/Stream | Canal System |
| Coordinates | 42.75970, -71.47360 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 41.7 ft |
| Year Completed | 1886 (140 years old) |
Storage & Hydraulics
| NID Storage | 325 acre-ft |
| Max Storage | 325 acre-ft |
| Normal Storage | 155 acre-ft |
| Surface Area | 42 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,680 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Nashua |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/28/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00430 |
| Federal ID | NH00430 |
| More Info | State Dam Safety Program |