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 126–150 of 267
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lincoln Sewage Lagoon Dam Grafton County | 19 | 1975 | Significant | Satisfactory |
| Lisbon Wastewater Lagoons Dam Grafton County | 13 | — | Significant | Satisfactory |
| Little Cohas Brook Dam Rockingham County | 10 | 1953 | Low | Satisfactory |
| Lochmere Belknap County | 11 | 1910 | Low | Satisfactory |
| Locke 2 Dam Grafton County | 60 | 1969 | Low | Satisfactory |
| Loon Pond Dam Grafton County | 7 | 1970 | Low | Satisfactory |
| Lower Beech Pond Dam Carroll County | 10 | 1860 | Low | Satisfactory |
| Lower Great Falls Strafford County | 36 | 1984 | Significant | Satisfactory |
| Lower Lisbon Grafton County | 18 | 1986 | Low | Satisfactory |
| Lower Mountain Lake Dam Grafton County | 33 | 1967 | Significant | Satisfactory |
| Lower Robertson Cheshire County | 18 | 1905 | Low | Satisfactory |
| Lower Valley Sullivan County | 33 | 1921 | Significant | Satisfactory |
| Lower Wilson Pond Dam Cheshire County | 18 | 1925 | Significant | Satisfactory |
| Macallen Dam Rockingham County | 27 | 1887 | High | Satisfactory |
| Manchester Airport Det Pond Dam Rockingham County | 27 | 1992 | Low | Satisfactory |
| Marchs Pond Dam Strafford County | 8 | 1840 | High | Satisfactory |
| Massabesic Lake Dam Hillsborough County | 30 | 1873 | High | Satisfactory |
| Mcgary Fletcher Rec Pond Dam Sullivan County | 18 | 1978 | Significant | Satisfactory |
| Mcindoes Grafton County | 25 | 1931 | Low | Satisfactory |
| Meetinghouse Pond Dam Cheshire County | 7 | 1840 | Low | Satisfactory |
| Meredith Reservoir Dam Belknap County | 25 | 1934 | Low | Satisfactory |
| Meriden Village Sewage Lagoon Dam Sullivan County | 9 | 1982 | Significant | Satisfactory |
| Millen Lake Dam Sullivan County | 23 | 1970 | Significant | Satisfactory |
| Mill Pond Dam Rockingham County | 13 | 1935 | Low | Satisfactory |
| Mine Falls Hillsborough County | 16 | 1889 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.