Boston Lot Lake Dam
Boston Lot Lake Dam is an earth dam located in Grafton County, New Hampshire, built in 1936. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Boston Lot Lake Dam
The primary purpose of Boston Lot Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Lebanon (local government). It impounds the Tr Connecticut River near Lebanon.
The dam stands 25 feet tall and stretches 300 feet across, creates a reservoir covering 54 acres, has a maximum storage capacity of 696 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1936, the structure is well-established, with more than 75 years of service.
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 05/09/2022.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Lebanon |
| River/Stream | Tr Connecticut River |
| Coordinates | 43.66440, -72.29270 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 300 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 696 acre-ft |
| Max Storage | 696 acre-ft |
| Normal Storage | 488 acre-ft |
| Surface Area | 54 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 564 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | CITY OF LEBANON |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/09/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00620 |
| Federal ID | NH00620 |
| More Info | State Dam Safety Program |