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 651–664 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Armington Lake Dam Grafton County | 9 | 1900 | Significant | Satisfactory |
| Arlington Mills Res Wheeler Dam Rockingham County | 54 | 1922 | High | Satisfactory |
| Arlington Mills Res West Dike Rockingham County | 10 | 1922 | Low | Satisfactory |
| Arlington Mill Res Evergreen Dike Rockingham County | 31 | 1922 | Significant | Fair |
| Apthorp Grafton County | 24 | 1936 | Significant | Satisfactory |
| Antrim Sewage Lagoons Dam Hillsborough County | 13 | 1978 | Significant | Satisfactory |
| Amoskeag Hillsborough County | 29 | 1921 | High | Fair |
| Ammonoosuc River Grafton County | 17 | 1900 | Low | Satisfactory |
| Alton Power Dam Belknap County | 16 | 1923 | High | Poor |
| Allied Leather Forebay Merrimack County | 15 | 1982 | Low | Satisfactory |
| Akers Pond Dam Coos County | 12 | 1930 | Low | Satisfactory |
| Airport Marsh Dam Coos County | 11 | 1956 | Low | Poor |
| Adams Pond Dam Belknap County | 10 | 1962 | Low | Fair |
| Abeniki Lake Dam Coos County | 40 | 1900 | High | Satisfactory |
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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.