Upper Mountain Lake Dam
Upper Mountain Lake Dam is an earth dam located in Grafton County, New Hampshire, built in 1963. It carries a Low hazard potential classification and has a fair condition assessment.
About Upper Mountain Lake Dam
The primary purpose of Upper Mountain Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mountain Lakes Village District (local government). It impounds the Waterman Brook near Haverhill.
The dam stands 31 feet tall and stretches 660 feet across, creates a reservoir covering 27 acres, has a maximum storage capacity of 499 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1963, the structure is well into its service life at over 50 years 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 04/18/2021.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Haverhill |
| River/Stream | Waterman Brook |
| Coordinates | 44.12013, -71.95709 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 660 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 499 acre-ft |
| Max Storage | 499 acre-ft |
| Normal Storage | 325 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,640 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | MOUNTAIN LAKES VILLAGE DISTRICT |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/18/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00190 |
| Federal ID | NH00190 |
| More Info | State Dam Safety Program |