Sugar River II is a concrete dam located in Sullivan County, New Hampshire, built in 2009. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 90 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Sugar River II
The primary purpose of Sugar River II is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is private-owned. It impounds the Sugar River near Newport.
The dam stands 10 feet tall and stretches 90 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 11 acre-feet, and collects water from a drainage area of 74 square miles. Completed in 2009, the structure is relatively new.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/26/2022.
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Location
| State | New Hampshire |
| County | Sullivan |
| Nearest City | Newport |
| River/Stream | Sugar River |
| Coordinates | 43.36540, -72.16430 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 90.5 ft |
| Year Completed | 2009 (17 years old) |
Storage & Hydraulics
| NID Storage | 11 acre-ft |
| Max Storage | 11 acre-ft |
| Normal Storage | 11 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 74 sq mi |
| Max Discharge | 2,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/26/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH83003 |
| Federal ID | NH83003 |
| More Info | State Dam Safety Program |