Godfrey Dam is a concrete dam located in Coos County, New Hampshire, built in 1920. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 119 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 Godfrey Dam
The primary purpose of Godfrey Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City of Berlin Water Works (local government). It impounds the Upper Ammonoosuc River near Berlin.
The dam stands 18 feet tall and stretches 119 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 51 acre-feet, and collects water from a drainage area of 24 square miles. Completed in 1920, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/08/2022.
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Location
| State | New Hampshire |
| County | Coos |
| Nearest City | Berlin |
| River/Stream | Upper Ammonoosuc River |
| Coordinates | 44.48410, -71.32050 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 119 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 24 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Berlin Water Works |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/08/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00613 |
| Federal ID | NH00613 |
| More Info | State Dam Safety Program |