Lake Twotowns Dam
Lake Twotowns Dam is an earth dam located in Coos County, New Hampshire, built in 1936. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lake Twotowns Dam
The primary purpose of Lake Twotowns Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by North Country Coos (private). It impounds the Tr Mohawk River near Dixville.
The dam stands 25 feet tall and stretches 700 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 51 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 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 10/28/2020.
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Location
| State | New Hampshire |
| County | Coos |
| Nearest City | Dixville |
| River/Stream | Tr Mohawk River |
| Coordinates | 44.87080, -71.32080 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 700 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 55 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | NORTH COUNTRY COOS |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/28/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00172 |
| Federal ID | NH00172 |
| More Info | State Dam Safety Program |