Forest Lake Dam is an earth dam located in Cheshire County, New Hampshire, built in 1915. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 8 ft8 ft tall and 75 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Forest Lake Dam
The primary purpose of Forest Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Forest Lake Improvement Assoc (private). It impounds the Tr Ashuelot River near Winchester.
The dam stands 8 feet tall and stretches 75 feet across, creates a reservoir covering 93 acres, has a maximum storage capacity of 378 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1915, 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 08/20/2019.
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Location
| State | New Hampshire |
| County | Cheshire |
| Nearest City | Winchester |
| River/Stream | Tr Ashuelot River |
| Coordinates | 42.79880, -72.36970 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 75 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 378 acre-ft |
| Max Storage | 378 acre-ft |
| Normal Storage | 164 acre-ft |
| Surface Area | 93 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 175 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Forest Lake Improvement Assoc |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/20/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00297 |
| Federal ID | NH00297 |
| More Info | State Dam Safety Program |