Blaisdell Lake Dam
Blaisdell Lake Dam is a concrete dam located in Merrimack County, New Hampshire, built in 1916. It carries a Low hazard potential classification and has a poor condition assessment.
About Blaisdell Lake Dam
The primary purpose of Blaisdell Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Blaisdell Lake Protective Assoc (private). It impounds the Tr Warner River near Sutton.
The dam stands 9 feet tall and stretches 150 feet across, creates a reservoir covering 161 acres, has a maximum storage capacity of 600 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1916, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/11/2020.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Sutton |
| River/Stream | Tr Warner River |
| Coordinates | 43.28270, -71.92880 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 150 ft |
| Year Completed | 1916 (110 years old) |
Storage & Hydraulics
| NID Storage | 600 acre-ft |
| Max Storage | 600 acre-ft |
| Normal Storage | 425 acre-ft |
| Surface Area | 161 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 134 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | BLAISDELL LAKE PROTECTIVE ASSOC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/11/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00563 |
| Federal ID | NH00563 |
| More Info | State Dam Safety Program |