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 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Taylor River Pond Dam Rockingham County | 19 | 1949 | High | Satisfactory |
| Taylor River Pond Dam Rockingham County | 14 | 1935 | Undetermined | Not Rated |
| Taylor Reservoir Dam Rockingham County | 21 | 1918 | Significant | Poor |
| Taylor Pond Dam Hillsborough County | 12 | 1965 | Low | Fair |
| Tannery Pond Dam Merrimack County | 12 | 1850 | Low | Satisfactory |
| Sweetwater Sullivan County | 33 | 1922 | Significant | Satisfactory |
| Swanzey Lake Dam Cheshire County | 12 | 1790 | Low | Fair |
| Swains Lake Dam Strafford County | 17 | 1890 | High | Satisfactory |
| Surry Mountain Dam Cheshire County | 83 | 1941 | High | Not Available |
| Supply Pond Dam Hillsborough County | 28 | 1854 | High | Fair |
| Sunset Lake Dam Belknap County | 17 | 1860 | High | Poor |
| Sunrise Lake Dam Strafford County | 19 | 1877 | High | Satisfactory |
| Suncook Lake Dam Belknap County | 16 | 1882 | High | Poor |
| Sunapee Lake Dam Sullivan County | 14 | 1872 | Significant | Not Rated |
| Sunapee Sullivan County | 15 | 1856 | Significant | Satisfactory |
| Sugar River Ii Sullivan County | 10 | 2009 | Significant | Satisfactory |
| Sugar River I Sullivan County | 18 | 1928 | Significant | Satisfactory |
| Stump Pond Dam Hillsborough County | 16 | 1938 | Low | Fair |
| Stubbs Pond Dam Rockingham County | 8 | 1963 | Low | Poor |
| Stratford Bog Pond Dam Coos County | 16 | 1934 | High | Poor |
| Storrs Pond Dam Grafton County | 34 | 1934 | Significant | Satisfactory |
| Stone Pond Overflow Dam Cheshire County | 6 | — | Low | Satisfactory |
| Stone Pond Mill Dam Cheshire County | 7 | 1920 | Low | Satisfactory |
| Stone Pond Dam Cheshire County | 16 | 1922 | Low | Poor |
| Stinson Lake Dam Grafton County | 8 | 1780 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.