Canaan Sewage Lagoon Dam is an earth dam located in Grafton County, New Hampshire, built in 1991. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 13 ft13 ft tall and 1,240 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 Canaan Sewage Lagoon Dam
Canaan Sewage Lagoon Dam is a dam in Grafton, New Hampshire. The dam is owned by Town of Canaan (local government). It impounds the Na near Canaan.
The dam stands 13 feet tall and stretches 1,240 feet across, creates a reservoir covering 0 acres, and has a maximum storage capacity of 9 acre-feet. Completed in 1991, the structure is 35 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 07/08/2022.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Canaan |
| River/Stream | Na |
| Coordinates | 43.64794, -71.99566 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 1,240 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 9 acre-ft |
| Max Storage | 9 acre-ft |
| Normal Storage | 5 acre-ft |
| Surface Area | 0 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Town of Canaan |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/08/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH01029 |
| Federal ID | NH01029 |
| More Info | State Dam Safety Program |