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 26–50 of 162
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Suncook Lake Dam Belknap County | 16 | 1882 | High | Poor |
| Stratford Bog Pond Dam Coos County | 16 | 1934 | High | Poor |
| Squam Lake Grafton County | 17 | 1856 | High | Satisfactory |
| Spectacle Pond Dam Grafton County | 7 | 1915 | High | Satisfactory |
| Souhegan Site 8 Dam Hillsborough County | 25 | 1977 | High | Satisfactory |
| Souhegan Site 14 Dam Hillsborough County | 28 | 1836 | High | Fair |
| Souhegan River Site 35 Dam Hillsborough County | 30 | 1965 | High | Fair |
| Souhegan River Site 33 Dam Hillsborough County | 21 | 1971 | High | Fair |
| Souhegan River Site 28 Dam Hillsborough County | 29 | 1964 | High | Satisfactory |
| Souhegan River Site 26 Dam Hillsborough County | 79 | 1965 | High | Fair |
| Souhegan River Site 25b Dam Hillsborough County | 74 | 1967 | High | Fair |
| Souhegan River Site 19 Dam Hillsborough County | 36 | 1962 | High | Fair |
| Souhegan River Site 12a South Dam Hillsborough County | 38 | 1965 | High | Fair |
| Souhegan River Site 12a North Dike Hillsborough County | 39 | 1965 | High | Fair |
| Souhegan River Site 10a Dam Hillsborough County | 59 | 1966 | High | Satisfactory |
| Smith Pond Dam Grafton County | 12 | 1830 | High | Fair |
| Seaver Reservoir Dam Cheshire County | 30 | 1924 | High | Satisfactory |
| Sawyer Lake Dam Belknap County | 19 | 1916 | High | Poor |
| Sargent Lake Dam Belknap County | 17 | 1870 | High | Poor |
| Sanborn Sawmill Dam Merrimack County | 13 | 1830 | High | Satisfactory |
| Sanborn Pond Grist Mill Dam Merrimack County | 16 | 1830 | High | Fair |
| Rochester Reservoir Dike Spillway Strafford County | 2 | 1935 | High | Satisfactory |
| Rochester Reservoir Dam Strafford County | 26 | 1935 | High | Satisfactory |
| Robinhood Park Reservoir Dam Cheshire County | 18 | 1872 | High | Satisfactory |
| Rivermill Mascoma Hydro Dam Grafton County | 22 | 1920 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.