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 376–400 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Island Pond Dam Cheshire County | 17 | 1920 | Low | Poor |
| Icy Gulch Reservoir Dam Coos County | 18 | 1940 | Significant | Satisfactory |
| Ice Pond Dam and Dike Rockingham County | 8 | 1972 | High | Satisfactory |
| Hunts Pond Dam Hillsborough County | 8 | 1908 | Low | Fair |
| Huckins Mill Pond Dam Carroll County | 10 | 1947 | Low | Poor |
| Huckins Mill Dam Merrimack County | 13 | 1830 | Undetermined | Not Rated |
| Hubbard Pond Dam & Dike Cheshire County | 8 | 1836 | Significant | Fair |
| Howe Reservoir Dam Cheshire County | 30 | 1924 | High | Fair |
| Horn Pond Dam Carroll County | 14 | 1930 | High | Poor |
| Hopkinton Sewage Lagoon Dam Merrimack County | 18 | 1983 | Significant | Satisfactory |
| Hopkinton Dam - Dike H-3 Merrimack County | 66 | 1962 | High | Not Available |
| Hopkinton Dam - Dike H-2 Merrimack County | 77 | 1962 | High | Not Available |
| Hopkinton Dam Merrimack County | 71 | 1962 | High | Not Available |
| Hopkinton Merrimack County | 10 | 1890 | Low | Satisfactory |
| Hooksett Merrimack County | 11 | 1927 | Low | Satisfactory |
| Hoods Pond Dam Rockingham County | 27 | 1945 | High | Satisfactory |
| Holt Pond Dam Hillsborough County | 13 | 1890 | Low | Satisfactory |
| Hoit Road Marsh Dam Merrimack County | 9 | 1968 | Low | Poor |
| Hoague - Sprague Merrimack County | 14 | 1906 | Significant | Satisfactory |
| Hillsborough Sewage Lagoon Dam Hillsborough County | 12 | 1984 | Significant | Fair |
| Hillsborough Mill Hillsborough County | 22 | 1925 | Significant | Fair |
| High View Wildlife Pond Dam Sullivan County | 27 | 1968 | Low | Poor |
| Highland Lake Dam Merrimack County | 10 | 1935 | Significant | Fair |
| Highland Lake Dam Cheshire County | 11 | 1911 | High | Poor |
| Hidden Pond Dam Cheshire County | 16 | 1966 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.