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 51–75 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Van Dyke Dam Cheshire County | 8 | 1982 | Low | Fair |
| Upper Wilson Pond Dam Cheshire County | 17 | 1910 | High | Poor |
| Upper Reservoir Dam Grafton County | 30 | 1924 | High | Fair |
| Upper Recreation Pond Dam Belknap County | 14 | 1970 | Low | Fair |
| Upper Peverly Pond Dam Rockingham County | 11 | 1935 | Low | Fair |
| Upper Mountain Lake Dam Grafton County | 31 | 1963 | Low | Fair |
| Upper Kimball Pond Dam Carroll County | 10 | 1800 | High | Poor |
| Upper City Dam Strafford County | 14 | 1920 | Significant | Fair |
| Upper Bucknell Pond Dam Carroll County | 31 | 2010 | Significant | Not Rated |
| Union Street Hillsborough County | 15 | 1916 | Significant | Satisfactory |
| Union Meadows Dam Carroll County | 10 | 1935 | Significant | Poor |
| Unh Water Treament Residual Lagoons Strafford County | 5 | 2017 | Significant | Satisfactory |
| Uncanoonuc Lake Dike Hillsborough County | 15 | 1954 | High | Fair |
| Uncanoonuc Lake Dam Hillsborough County | 10 | 1936 | High | Satisfactory |
| Tyler Tree Farm Dam Grafton County | 25 | 1969 | Significant | Fair |
| Turtle Pond Dam Merrimack County | 8 | 1932 | Low | Poor |
| Turkey Pond Dam Merrimack County | 15 | 1958 | High | Satisfactory |
| Troy Sewage Lagoons Dam Cheshire County | 16 | 1983 | Significant | Satisfactory |
| Transfer Station Lagoons Dam Merrimack County | — | — | Significant | Unsatisfactory |
| Tower Hill Pond Dam Rockingham County | 35 | 1938 | High | Satisfactory |
| Todd Lake Dam Merrimack County | 17 | 1858 | Significant | Poor |
| Thurston Pond Dam Rockingham County | 9 | 1772 | Undetermined | Not Rated |
| Three Mile Reservoir Dam Cheshire County | 20 | 1986 | High | Satisfactory |
| Thornwood Commons Pond Dam Strafford County | 16 | 1961 | Significant | Satisfactory |
| Thorndike Pond Dam Cheshire County | 13 | 1915 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.