Franklin Falls Hydro Dam 2 is a concrete dam located in Merrimack County, New Hampshire, built in 1888. It carries a Significant hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 150 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 Franklin Falls Hydro Dam 2
The primary purpose of Franklin Falls Hydro Dam 2 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 Franklin Falls Hydro Corp (private). It impounds the Winnipesaukee River near Franklin.
The dam stands 20 feet tall and stretches 150 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 45 acre-feet, and collects water from a drainage area of 457 square miles. Completed in 1888, the structure is over a century 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. The most recent inspection on record was 05/24/2018.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Franklin |
| River/Stream | Winnipesaukee River |
| Coordinates | 43.44270, -71.64940 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 150 ft |
| Year Completed | 1888 (138 years old) |
Storage & Hydraulics
| NID Storage | 45 acre-ft |
| Max Storage | 45 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 457 sq mi |
| Max Discharge | 2,000 cfs |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Franklin Falls Hydro Corp |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 05/24/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH83025 |
| Federal ID | NH83025 |
| More Info | State Dam Safety Program |