New Hampshire Dams
664 dams tracked by the National Inventory of Dams
Total Dams
664
High Hazard
162
24.4%
Poor / Unsatisfactory
152
Average Age
100 yrs
Hazard Classification
High162 (24.4%)
Significant185 (27.9%)
Low300 (45.2%)
Condition Assessment
Satisfactory267 (40.2%)
Fair169 (25.5%)
Poor / Unsatisfactory152 (22.9%)
Not Rated76 (11.4%)
Federal
22
State
170
Local
195
Private
261
Tallest Dams
- Comerford 170 ft
- Moore 149 ft
- Otter Brook Dam119 ft
- Franklin Falls Dam116 ft
- Everett Dam115 ft
High Hazard Dams
- Comerford High
- Moore High
- Otter Brook DamHigh
- Franklin Falls DamHigh
- Everett DamHigh
Poor Condition Dams
All Dams in New Hampshire
Showing 101–125 of 169
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Harrisville Pond Dam Cheshire County | 16 | 1886 | High | Fair |
| Hall Mountain Marsh Dam Merrimack County | 13 | 1945 | Low | Fair |
| Gunnison Lake Site D2 Dam Sullivan County | 62 | 1983 | High | Fair |
| Groveton Paper Mill Lagoons Dam Coos County | 25 | 2010 | Significant | Fair |
| Grassy Pond Dam Merrimack County | 9 | 1836 | Low | Fair |
| Grafton Pond Dam Grafton County | 21 | 1918 | Low | Fair |
| Goose Pond Dike Cheshire County | 8 | 1868 | Low | Fair |
| Gonic Dam Strafford County | 16 | 1935 | Significant | Fair |
| Goldfish Pond Dam Merrimack County | 16 | 1974 | Low | Fair |
| Goffstown Lower Reservoir Dam Hillsborough County | 30 | 1906 | High | Fair |
| George Pond Dam Grafton County | 11 | 1911 | High | Fair |
| Freeses Pond Dam Rockingham County | 13 | 1930 | Low | Fair |
| Flintlock Estates Fire Pond Dam Merrimack County | 8 | 1987 | Low | Fair |
| Flagpole Pond Dike Merrimack County | 15 | 1967 | Low | Fair |
| Flagpole Pond Dam Merrimack County | 21 | 1967 | Low | Fair |
| First Conn Lake South Bay Dike Coos County | 14 | — | Low | Fair |
| First Connecticut Lake Dam Coos County | 56 | 1930 | High | Fair |
| Fifield Farm Pond Dam Merrimack County | 13 | 1966 | Low | Fair |
| Farrar Marsh Dam Hillsborough County | 11 | 1978 | Significant | Fair |
| Farmington Levee Strafford County | 15 | 1956 | High | Fair |
| Epping Wastewater Lagoons Dam Rockingham County | 9 | 1970 | Significant | Fair |
| Emery Road Dam Merrimack County | 10 | 1910 | Low | Fair |
| Dunklee Pond Dam Hillsborough County | 9 | 1986 | Low | Fair |
| Downing Pond Dam Strafford County | 15 | 1921 | Low | Fair |
| Dorr Woolen Sewage Lagoon Dam Sullivan County | 20 | 1982 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.