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 626–650 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Balsams Wastewater Lagoons Dam Coos County | 28 | 1965 | Significant | Fair |
| Balsams Mohawk River Dam Coos County | 55 | — | Significant | Not Rated |
| Ballard Pond Upper Dam Rockingham County | 7 | 1935 | Low | Poor |
| Ballard Pond Mill Dam Rockingham County | 21 | 1941 | Significant | Satisfactory |
| Baker River Site 8 Dam Grafton County | 63 | 1967 | High | Satisfactory |
| Baker River Site 6 Dam Grafton County | 14 | 1969 | Significant | Satisfactory |
| Baker River Site 6a Dam Grafton County | 68 | 1975 | High | Poor |
| Baker River Site 5 Dike Grafton County | 20 | 1969 | Low | Satisfactory |
| Baker River Site 5 Dam Grafton County | 53 | 1967 | High | Poor |
| Baker River Site 2 Dam Grafton County | 68 | 1965 | High | Fair |
| Baker River Site 11 Dam Grafton County | 24 | 1971 | High | Poor |
| Baker River Site 11a Dam Grafton County | 24 | 1971 | High | Satisfactory |
| Baker Brook Pond Dam Grafton County | 11 | 1928 | Significant | Poor |
| Badger Brook Nh-107 Embankment Dam Belknap County | 48 | — | Undetermined | Not Rated |
| Back Lake Dam Coos County | 7 | 1930 | Low | Poor |
| Babbidge Reservoir Dam Cheshire County | 38 | 1931 | High | Satisfactory |
| Ayers Pond Dam Strafford County | 18 | 1810 | Significant | Fair |
| Ayers Pond Dam Hillsborough County | 16 | 1865 | Low | Fair |
| Ayers Island Grafton County | 80 | 1924 | Significant | Satisfactory |
| Avery Belknap County | 13 | 1947 | Low | Satisfactory |
| Atkinson Cc Lagoon Dam Rockingham County | 14 | 2001 | Significant | Satisfactory |
| Ashuelot River Dam Cheshire County | 16 | 1919 | Low | Not Rated |
| Ashuelot Pond Dam Sullivan County | 13 | 1872 | High | Poor |
| Ashuelot Paper Mill Dam Cheshire County | 18 | 1910 | Low | Not Rated |
| Ashland Sewage Lagoon Dam Grafton County | 15 | 1968 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.