Jaffrey Sewage Lagoon Dam
Jaffrey Sewage Lagoon Dam is an earth dam located in Cheshire County, New Hampshire, built in 1984. It carries a Significant hazard potential classification and has a fair condition assessment.
About Jaffrey Sewage Lagoon Dam
Jaffrey Sewage Lagoon Dam is a dam in Cheshire, New Hampshire. The dam is owned by Town Of Jaffrey (local government). It impounds the Na near Jaffrey.
The dam stands 25 feet tall and stretches 3,450 feet across, creates a reservoir covering 10 acres, and has a maximum storage capacity of 118 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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/30/2022.
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Location
| State | New Hampshire |
| County | Cheshire |
| Nearest City | Jaffrey |
| River/Stream | Na |
| Coordinates | 42.82134, -71.99449 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 3,450 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 118 acre-ft |
| Max Storage | 118 acre-ft |
| Normal Storage | 118 acre-ft |
| Surface Area | 10 acres |
Ownership & Safety
| Purpose | Other |
| Owner | TOWN OF JAFFREY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/30/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00735 |
| Federal ID | NH00735 |
| More Info | State Dam Safety Program |