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 1–25 of 162
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Abeniki Lake Dam Coos County | 40 | 1900 | High | Satisfactory |
| Alton Power Dam Belknap County | 16 | 1923 | High | Poor |
| Amoskeag Hillsborough County | 29 | 1921 | High | Fair |
| Arlington Mills Res Wheeler Dam Rockingham County | 54 | 1922 | High | Satisfactory |
| Ashuelot Pond Dam Sullivan County | 13 | 1872 | High | Poor |
| Babbidge Reservoir Dam Cheshire County | 38 | 1931 | High | Satisfactory |
| Baker River Site 11a Dam Grafton County | 24 | 1971 | High | Satisfactory |
| Baker River Site 11 Dam Grafton County | 24 | 1971 | High | Poor |
| Baker River Site 2 Dam Grafton County | 68 | 1965 | High | Fair |
| Baker River Site 5 Dam Grafton County | 53 | 1967 | High | Poor |
| Baker River Site 6a Dam Grafton County | 68 | 1975 | High | Poor |
| Baker River Site 8 Dam Grafton County | 63 | 1967 | High | Satisfactory |
| Barnstead Parade Dam Belknap County | 16 | 1830 | High | Poor |
| Beech River Mill Dam Carroll County | 14 | 1851 | High | Poor |
| Bellamy Reservoir Dam Strafford County | 35 | 1962 | High | Satisfactory |
| Berry Pond Dam Merrimack County | 18 | 1884 | High | Satisfactory |
| Blackwater Dam Merrimack County | 75 | 1941 | High | Not Available |
| Blackwater Dam - Dodge Estate Dike Merrimack County | 18 | 1941 | High | Not Available |
| Blackwater Dam - Little Hill Dike Merrimack County | 38 | 1941 | High | Not Available |
| Bowers Dam Hillsborough County | 25 | 1884 | High | Poor |
| Bow Lake Dam Strafford County | 24 | 1832 | High | Poor |
| Campton Pond Hydro Dam Grafton County | 39 | 1890 | High | Fair |
| Cascade Coos County | 57 | 1903 | High | Fair |
| Chesham Pond Dam Cheshire County | 16 | 1921 | High | Satisfactory |
| Cheshire Mills Lower Dam Cheshire County | 18 | 1848 | High | Poor |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.