Eastman Falls
Eastman Falls is a concrete dam located in Merrimack County, New Hampshire, built in 1937. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Eastman Falls
The primary purpose of Eastman Falls is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. It impounds the Pemigewasset River near Franklin.
The dam stands 43 feet tall and stretches 414 feet across, creates a reservoir covering 90 acres, has a maximum storage capacity of 9,340 acre-feet, and collects water from a drainage area of 1,003 square miles. Completed in 1937, the structure is well-established, with more than 75 years of service.
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 07/25/2022.
At 43 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Franklin |
| River/Stream | Pemigewasset River |
| Coordinates | 43.44723, -71.65811 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 414 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 9,340 acre-ft |
| Max Storage | 9,340 acre-ft |
| Normal Storage | 9,340 acre-ft |
| Surface Area | 90 acres |
| Drainage Area | 1,003 sq mi |
| Max Discharge | 75,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | Not Listed |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/25/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00164 |
| Federal ID | NH00164 |
| More Info | State Dam Safety Program |