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 351–375 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Manchester Airport Det Pond Dam Rockingham County | 27 | 1992 | Low | Satisfactory |
| Marchs Pond Dam Strafford County | 8 | 1840 | High | Satisfactory |
| Marston Finn Conservation Dam Rockingham County | 14 | 1778 | Low | Not Rated |
| Mascoma Lake Dam Grafton County | 18 | 1881 | High | Poor |
| Massabesic Lake Dam Hillsborough County | 30 | 1873 | High | Satisfactory |
| May Pond Dam Sullivan County | 14 | 1830 | Significant | Fair |
| Mcgary Fletcher Rec Pond Dam Sullivan County | 18 | 1978 | Significant | Satisfactory |
| Mcindoes Grafton County | 25 | 1931 | Low | Satisfactory |
| Meadow Lake Dam Rockingham County | 14 | 1975 | Low | Poor |
| Meetinghouse Pond Dam Cheshire County | 7 | 1840 | Low | Satisfactory |
| Melvin River Dam Carroll County | 17 | 1930 | Significant | Poor |
| Mendums Pond Dam Rockingham County | 31 | 1840 | High | Poor |
| Meredith Reservoir Dam Belknap County | 25 | 1934 | Low | Satisfactory |
| Meriden Village Sewage Lagoon Dam Sullivan County | 9 | 1982 | Significant | Satisfactory |
| Merrimack River Right Bank Fdr Hillsborough County | 15 | 1949 | High | Fair |
| Merrymeeting Lake Dam Strafford County | 22 | 1924 | High | Poor |
| Middle Hancock LLC Dam Hillsborough County | 9 | 1976 | Low | Fair |
| Millen Lake Dam Sullivan County | 23 | 1970 | Significant | Satisfactory |
| Mill Pond Dam Cheshire County | 16 | 1937 | Significant | Fair |
| Mill Pond Dam Strafford County | 10 | 1935 | Low | Poor |
| Mill Pond Dam Cheshire County | 20 | 1880 | Low | Poor |
| Mill Pond Dam Rockingham County | 13 | 1935 | Low | Satisfactory |
| Mill Pond Road Dam Cheshire County | 17 | 1979 | Undetermined | Not Rated |
| Millville Lake Dam Rockingham County | 20 | 1917 | High | Poor |
| Milton Leatherboard Dam Strafford County | 32 | 1904 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.