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 126–150 of 169
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ragged Mountain Snow Pond Dam Merrimack County | 49 | 1988 | Low | Fair |
| Recreation Pond Dam Merrimack County | 8 | 1950 | Low | Fair |
| Robb Reservoir Dam Cheshire County | 13 | 1912 | Low | Fair |
| Rockwood Pond Dam Cheshire County | 11 | 1915 | Low | Fair |
| Rodgers Pond Dam Cheshire County | 14 | 1922 | Low | Fair |
| Russell Reservoir Dam Cheshire County | 12 | 1923 | Low | Fair |
| Sanborn Pond Grist Mill Dam Merrimack County | 16 | 1830 | High | Fair |
| Sand Pond Dam Cheshire County | 12 | 1925 | Low | Fair |
| Sand Pond Dam Cheshire County | 10 | 1920 | Significant | Fair |
| Seavey Pond Dike Access Road Dam Rockingham County | 10 | 2002 | Low | Fair |
| Second Connecticut Lake Dam Coos County | 28 | 1849 | Low | Fair |
| Shannon Lake Dam Carroll County | 20 | 1930 | Significant | Fair |
| Sheep Davis Road Dam Merrimack County | 24 | 1990 | Low | Fair |
| Silver Lake Dam Carroll County | 8 | 1926 | Low | Fair |
| Smith Pond Dam Grafton County | 12 | 1830 | High | Fair |
| Souhegan River Site 12a North Dike Hillsborough County | 39 | 1965 | High | Fair |
| Souhegan River Site 12a South Dam Hillsborough County | 38 | 1965 | High | Fair |
| Souhegan River Site 15 Dam Hillsborough County | 13 | 1963 | Significant | Fair |
| Souhegan River Site 19 Dam Hillsborough County | 36 | 1962 | High | Fair |
| Souhegan River Site 25b Dam Hillsborough County | 74 | 1967 | High | Fair |
| Souhegan River Site 26 Dam Hillsborough County | 79 | 1965 | High | Fair |
| Souhegan River Site 33 Dam Hillsborough County | 21 | 1971 | High | Fair |
| Souhegan River Site 35 Dam Hillsborough County | 30 | 1965 | High | Fair |
| Souhegan Site 14 Dam Hillsborough County | 28 | 1836 | High | Fair |
| Stump Pond Dam Hillsborough County | 16 | 1938 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.