Glen Road is a concrete dam located in Grafton County, New Hampshire, built in 1988. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 17 ft17 ft tall and 175 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 Glen Road
The primary purpose of Glen Road is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Green Mountain Power (private). It impounds the Mascoma River near Lebanon.
The dam stands 17 feet tall and stretches 175 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 10 acre-feet, and collects water from a drainage area of 194 square miles. Completed in 1988, the structure is 38 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. An emergency action plan is in place for this dam. The most recent inspection on record was 09/12/2022.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Lebanon |
| River/Stream | Mascoma River |
| Coordinates | 43.63525, -72.30379 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 175 ft |
| Year Completed | 1988 (38 years old) |
Storage & Hydraulics
| NID Storage | 10 acre-ft |
| Max Storage | 10 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 194 sq mi |
| Max Discharge | 8,970 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Green Mountain Power |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/12/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00159 |
| Federal ID | NH00159 |
| More Info | State Dam Safety Program |