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 426–450 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Granite Lake Dam Cheshire County | 11 | 1814 | High | Satisfactory |
| Grafton Pond Dam Grafton County | 21 | 1918 | Low | Fair |
| Gorham Coos County | 20 | 1958 | Low | Satisfactory |
| Gorham Coos County | 24 | 1904 | Low | Satisfactory |
| Gordon Hill Water Supply Dam Belknap County | 15 | 1934 | Significant | Satisfactory |
| Goose Pond Dike Cheshire County | 8 | 1868 | Low | Fair |
| Goose Pond Dam Merrimack County | 12 | 1920 | Low | Not Rated |
| Goose Pond Dam Grafton County | 31 | 1918 | High | Poor |
| Goose Pond Dam Cheshire County | 22 | 1868 | High | Satisfactory |
| Goodrich Falls Dam Carroll County | 25 | 1935 | Low | Not Rated |
| Gonic Dam Strafford County | 16 | 1935 | Significant | Fair |
| Goldman Dam Hillsborough County | 12 | 1930 | Low | Not Rated |
| Goldfish Pond Dam Merrimack County | 16 | 1974 | Low | Fair |
| Goffstown Upper Reservoir Dam Hillsborough County | 31 | 1934 | High | Poor |
| Goffstown Lower Reservoir Dam Hillsborough County | 30 | 1906 | High | Fair |
| Godfrey Dam Coos County | 18 | 1920 | Significant | Satisfactory |
| Godbout Pond West Dike Coos County | 35 | — | Undetermined | Not Rated |
| Glen Road Grafton County | 17 | 1988 | Significant | Satisfactory |
| Gilson Pond Dam Cheshire County | 11 | 1875 | Low | Satisfactory |
| Gilman Coos County | 38 | 1898 | Low | Satisfactory |
| Gillan Pond Dam Belknap County | 10 | 1971 | Low | Poor |
| Giles Pond Merrimack County | 18 | 1904 | Low | Satisfactory |
| George Pond Dam Grafton County | 11 | 1911 | High | Fair |
| Garvins Falls Merrimack County | 18 | 1901 | Low | Satisfactory |
| Fullam Pond Dam Cheshire County | 18 | — | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.