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 101–125 of 267
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hargate Dam Merrimack County | 14 | 1835 | Low | Satisfactory |
| Harris Pond Dam Hillsborough County | 35 | 1861 | High | Satisfactory |
| Hatfields Strafford County | 20 | 1937 | Significant | Satisfactory |
| Hermit Hill Farm Pond Dam Grafton County | 13 | 1975 | Low | Satisfactory |
| Hoague - Sprague Merrimack County | 14 | 1906 | Significant | Satisfactory |
| Holt Pond Dam Hillsborough County | 13 | 1890 | Low | Satisfactory |
| Hoods Pond Dam Rockingham County | 27 | 1945 | High | Satisfactory |
| Hooksett Merrimack County | 11 | 1927 | Low | Satisfactory |
| Hopkinton Merrimack County | 10 | 1890 | Low | Satisfactory |
| Hopkinton Sewage Lagoon Dam Merrimack County | 18 | 1983 | Significant | Satisfactory |
| Ice Pond Dam and Dike Rockingham County | 8 | 1972 | High | Satisfactory |
| Icy Gulch Reservoir Dam Coos County | 18 | 1940 | Significant | Satisfactory |
| Island Pond Dam Sullivan County | 13 | 1861 | Low | Satisfactory |
| Jackson Mills Hillsborough County | 33 | 1920 | Significant | Satisfactory |
| Jackson Pond Dam Belknap County | 12 | 1894 | Significant | Satisfactory |
| J. Brodie Smith Coos County | 31 | 1948 | High | Satisfactory |
| Jones Pond Dam Strafford County | 19 | 1981 | High | Satisfactory |
| Kilburn Pond Dam Cheshire County | 15 | 1935 | Low | Satisfactory |
| Kimball Pond Dam Merrimack County | 8 | 1850 | Low | Satisfactory |
| Knowles Pond Dam Merrimack County | 11 | 1935 | Low | Satisfactory |
| Lakeport Belknap County | 10 | 1958 | Significant | Satisfactory |
| Lake Tarleton Dam Grafton County | 8 | 1800 | Low | Satisfactory |
| Lake Twotowns Dam Coos County | 25 | 1936 | Low | Satisfactory |
| Lebanon Water Treatment Intake Dam Grafton County | 16 | 1934 | Significant | Satisfactory |
| Lime Pond Dam Coos County | 10 | 1934 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.