Wendall Marsh Dam
Wendall Marsh Dam is a concrete dam located in Sullivan County, New Hampshire. It carries a Significant hazard potential classification and has a fair condition assessment.
About Wendall Marsh Dam
The primary purpose of Wendall Marsh Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Fish And Game Department (state). It impounds the Sugar River near Sunapee.
The dam stands 15 feet tall and stretches 74 feet across, creates a reservoir covering 30 acres, has a maximum storage capacity of 365 acre-feet, and collects water from a drainage area of 49 square miles.
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 03/31/2020.
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Location
| State | New Hampshire |
| County | Sullivan |
| Nearest City | Sunapee |
| River/Stream | Sugar River |
| Coordinates | 43.37789, -72.10751 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 74 ft |
Storage & Hydraulics
| NID Storage | 365 acre-ft |
| Max Storage | 365 acre-ft |
| Normal Storage | 104 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 49 sq mi |
| Max Discharge | 3,130 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | NH FISH AND GAME DEPARTMENT |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 03/31/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00603 |
| Federal ID | NH00603 |
| More Info | State Dam Safety Program |