Peterborough Treatment Lagoon Dam
Peterborough Treatment Lagoon Dam is an earth dam located in Hillsborough, New Hampshire, built in 1972. It carries a Significant hazard potential classification and has a fair condition assessment.
About Peterborough Treatment Lagoon Dam
Peterborough Treatment Lagoon Dam is a dam in Hillsborough, New Hampshire. The dam is owned by Town Of Peterborough (local government). It impounds the Na near Peterborough.
The dam stands 9 feet tall and stretches 3,300 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 100 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 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 09/30/2021.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Peterborough |
| River/Stream | Na |
| Coordinates | 42.90972, -71.93101 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 3,300 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 13 acres |
Ownership & Safety
| Purpose | Other |
| Owner | TOWN OF PETERBOROUGH |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/30/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00499 |
| Federal ID | NH00499 |
| More Info | State Dam Safety Program |