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 501–525 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Russell Reservoir Dam Cheshire County | 12 | 1923 | Low | Fair |
| Rust Pond Dam Carroll County | 8 | — | Significant | Satisfactory |
| Salmon Brook Dam Hillsborough County | 28 | 1963 | Low | Not Rated |
| Salmon Brook I Dam Hillsborough County | 17 | 1887 | Low | Not Rated |
| Sanborn Pond Grist Mill Dam Merrimack County | 16 | 1830 | High | Fair |
| Sanborn Sawmill Dam Merrimack County | 13 | 1830 | High | Satisfactory |
| Sand Pond Dam Cheshire County | 10 | 1920 | Significant | Fair |
| Sand Pond Dam Cheshire County | 12 | 1925 | Low | Fair |
| Sargent Center Infiltration Lagoon Hillsborough County | 11 | — | Significant | Not Rated |
| Sargent Lake Dam Belknap County | 17 | 1870 | High | Poor |
| Sauls Pond Dam Rockingham County | 10 | 1988 | Low | Poor |
| Sawmill Coos County | 15 | 1965 | Low | Satisfactory |
| Sawyer Lake Dam Belknap County | 19 | 1916 | High | Poor |
| Scott Bog Pond Dam Coos County | 9 | 1942 | Low | Satisfactory |
| Scott Pond Dam Cheshire County | 10 | 1918 | Significant | Poor |
| Scribner Road Dam Rockingham County | 12 | 1930 | Low | Poor |
| Seaver Reservoir Dam Cheshire County | 30 | 1924 | High | Satisfactory |
| Seavey Pond Dike Access Road Dam Rockingham County | 10 | 2002 | Low | Fair |
| Seavey Pond Outlet Dam Rockingham County | 8 | — | Low | Poor |
| 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 |
| Shehan Pond Dam Coos County | 25 | 1960 | Low | Poor |
| Shelburne Coos County | 17 | 1906 | Low | Satisfactory |
| Shellcamp Pond Dam Belknap County | 12 | 1920 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.