Hillsborough Sewage Lagoon Dam
Hillsborough Sewage Lagoon Dam is an earth dam located in Hillsborough, New Hampshire, built in 1984. It carries a Significant hazard potential classification and has a fair condition assessment.
About Hillsborough Sewage Lagoon Dam
Hillsborough Sewage Lagoon Dam is a dam in Hillsborough, New Hampshire. The dam is owned by Town Of Hillsborough (local government). It impounds the Na near Hillsborough.
The dam stands 12 feet tall and stretches 2,000 feet across, creates a reservoir covering 2 acres, and has a maximum storage capacity of 11 acre-feet. Completed in 1984, the structure is 42 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 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 05/04/2021.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Hillsborough |
| River/Stream | Na |
| Coordinates | 43.11910, -71.88440 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 2,000 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 11 acre-ft |
| Max Storage | 11 acre-ft |
| Normal Storage | 5 acre-ft |
| Surface Area | 2 acres |
Ownership & Safety
| Purpose | Other |
| Owner | TOWN OF HILLSBOROUGH |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/04/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00718 |
| Federal ID | NH00718 |
| More Info | State Dam Safety Program |