Waterville Valley Lagoons Dam is an earth dam located in Grafton County, New Hampshire, built in 1972. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 19 ft19 ft tall and 1,200 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 Waterville Valley Lagoons Dam
Waterville Valley Lagoons Dam is a dam in Grafton, New Hampshire. The dam is owned by Town of Waterville Valley (local government). It impounds the Na near Waterville Valley.
The dam stands 19 feet tall and stretches 1,200 feet across, creates a reservoir covering 3 acres, and has a maximum storage capacity of 36 acre-feet. Completed in 1972, the structure is well into its service life at over 50 years old.
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. The most recent inspection on record was 06/16/2021.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Waterville Valley |
| River/Stream | Na |
| Coordinates | 43.94520, -71.51020 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 36 acre-ft |
| Max Storage | 36 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 3 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Town of Waterville Valley |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/16/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH03556 |
| Federal ID | NH03556 |
| More Info | State Dam Safety Program |