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 1–25 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| York Pond Dam Coos County | 12 | 1930 | Low | Not Rated |
| York Merrimack County | 10 | 1967 | Low | Satisfactory |
| Ymca Camp Takodah Sewage Lagoon Dam Cheshire County | 8 | 1940 | Significant | Satisfactory |
| Ws Packaging Canal Dam Hillsborough County | 15 | 1876 | High | Satisfactory |
| Woodward Pond Dam Cheshire County | 22 | 1836 | High | Satisfactory |
| Woodsville Grafton County | 12 | 1827 | Significant | Satisfactory |
| Woodbury Estate Pond Dam Hillsborough County | 16 | 1935 | Significant | Satisfactory |
| Wong Wildlife Pond Dam Belknap County | 19 | 1976 | Low | Poor |
| Wolfeboro Sewage Lagoon Dam Carroll County | 45 | 1975 | High | Fair |
| Wiswall Dam Strafford County | 22 | 1911 | Significant | Fair |
| Winnipocket Lake Dam Merrimack County | 7 | 1944 | Low | Poor |
| Winding Brook Road Dam Rockingham County | 8 | 1980 | Significant | Poor |
| Wilson Pond Dam Cheshire County | 8 | 1920 | Significant | Poor |
| Willow Pond Dam Sullivan County | 10 | 1982 | Low | Satisfactory |
| Willard Pond Dam Hillsborough County | 8 | 1937 | Low | Fair |
| Wildsong Farm Pond Dike Belknap County | 18 | 1969 | Low | Fair |
| Wildsong Farm Pond Dam 1 Belknap County | 16 | 1969 | Low | Fair |
| Wildlife Pond Dam Belknap County | 9 | 1973 | Low | Poor |
| Wildlife Pond Dam Sullivan County | 16 | 1955 | Undetermined | Not Rated |
| Wildlife Pond Dam Sullivan County | 12 | 1972 | Low | Satisfactory |
| Wildlife Pond Dam Hillsborough County | 10 | — | Undetermined | Not Rated |
| Wilder Grafton County | 59 | 1950 | High | Satisfactory |
| Whittemore Lake Dam Hillsborough County | 11 | 1886 | Low | Poor |
| Whitewater Brook Dam Sullivan County | 95 | 1968 | High | Fair |
| Whites Pond Dam and Dike Merrimack County | 15 | 1890 | High | Satisfactory |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.