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 76–100 of 169
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hillsborough Sewage Lagoon Dam Hillsborough County | 12 | 1984 | Significant | Fair |
| Howe Reservoir Dam Cheshire County | 30 | 1924 | High | Fair |
| Hubbard Pond Dam & Dike Cheshire County | 8 | 1836 | Significant | Fair |
| Hunts Pond Dam Hillsborough County | 8 | 1908 | Low | Fair |
| Jaffrey Sewage Lagoon Dam Cheshire County | 25 | 1984 | Significant | Fair |
| Kendall Pond Dam Rockingham County | 12 | 1930 | Low | Fair |
| Kilton Pond Dam Grafton County | 12 | 1930 | Low | Fair |
| Knight Meadow Pond Dam Merrimack County | 9 | 1966 | Low | Fair |
| Locke Lake Dam Belknap County | 12 | 1965 | Low | Fair |
| Long Pond Dam Sullivan County | 10 | 1910 | Low | Fair |
| Lower Ipc Dam Grafton County | 16 | 1930 | Significant | Fair |
| Lower Reservoir Dam Grafton County | 33 | 1893 | High | Fair |
| May Pond Dam Sullivan County | 14 | 1830 | Significant | Fair |
| Merrimack River Right Bank Fdr Hillsborough County | 15 | 1949 | High | Fair |
| Middle Hancock LLC Dam Hillsborough County | 9 | 1976 | Low | Fair |
| Mill Pond Dam Cheshire County | 16 | 1937 | Significant | Fair |
| Milton Waste Water Lagoons Dam Strafford County | 20 | 1985 | Significant | Fair |
| Montcalm Golf Club Dam Grafton County | 27 | 1984 | Low | Fair |
| Moose Brook Dam Hillsborough County | 9 | 1977 | Low | Fair |
| Morey Pond Dam Merrimack County | 12 | — | Low | Fair |
| Morgan Pond Dam Sullivan County | 12 | 1939 | Significant | Fair |
| Mountain Brook Reservoir Dam Cheshire County | 18 | 1951 | Significant | Fair |
| Mountain Pond Dam Hillsborough County | 13 | 1930 | Low | Fair |
| Mountain Pond North Dam Belknap County | 14 | 1913 | Low | Fair |
| Mountain Pond South Dam Belknap County | 7 | 1913 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.