Colebrook Sewage Lagoon Dam
Colebrook Sewage Lagoon Dam is an earth dam located in Coos County, New Hampshire, built in 1975. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Colebrook Sewage Lagoon Dam
Colebrook Sewage Lagoon Dam is a dam in Coos, New Hampshire. The dam is owned by Town Of Colebrook (local government). It impounds the Na near Colebrook.
The dam stands 15 feet tall and stretches 3,100 feet across, creates a reservoir covering 3 acres, and has a maximum storage capacity of 24 acre-feet. Completed in 1975, 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 06/08/2022.
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Location
| State | New Hampshire |
| County | Coos |
| Nearest City | Colebrook |
| River/Stream | Na |
| Coordinates | 44.90120, -71.49840 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 3,100 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 24 acre-ft |
| Max Storage | 24 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 3 acres |
Ownership & Safety
| Purpose | Other |
| Owner | TOWN OF COLEBROOK |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/08/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00942 |
| Federal ID | NH00942 |
| More Info | State Dam Safety Program |