Lisbon Wastewater Lagoons Dam is an earth dam located in Grafton County, New Hampshire. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 13 ft13 ft tall and 1,600 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 Lisbon Wastewater Lagoons Dam
Lisbon Wastewater Lagoons Dam is a dam in Grafton, New Hampshire. The dam is owned by Town of Lisbon (local government). It impounds the Na near Lisbon.
The dam stands 13 feet tall and stretches 1,600 feet across, creates a reservoir covering 3 acres, and has a maximum storage capacity of 29 acre-feet.
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 10/25/2019.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Lisbon |
| River/Stream | Na |
| Coordinates | 44.20235, -71.92807 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 1,600 ft |
Storage & Hydraulics
| NID Storage | 29 acre-ft |
| Max Storage | 29 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 3 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Town of Lisbon |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/25/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH02354 |
| Federal ID | NH02354 |
| More Info | State Dam Safety Program |