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 101–125 of 267
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Oliverian Dam Grafton County | 52 | 1962 | High | Satisfactory |
| Old Mill Pond Dam Rockingham County | 11 | 1930 | Significant | Satisfactory |
| Nottingham Lake Dam Rockingham County | 14 | — | Low | Satisfactory |
| Noone Mills Hillsborough County | 14 | 1938 | Significant | Satisfactory |
| New Hampton Village Prct Ww Lagoon Belknap County | 9 | 1930 | Significant | Satisfactory |
| Newfields Sewage Lagoon Dam Rockingham County | 19 | 1982 | Significant | Satisfactory |
| Nashua Canal Dam and Dike Hillsborough County | 11 | 1886 | Low | Satisfactory |
| Municipal Primary Sewage Lagoon 1 Sullivan County | 11 | 1968 | Significant | Satisfactory |
| Municipal Finishing Sewage Lagoon 2 Sullivan County | 11 | 1968 | Significant | Satisfactory |
| Mt Carberry Leachate Pond Dam Coos County | 5 | — | Significant | Satisfactory |
| Mount Sunapee Sewage Lagoon Dam Merrimack County | 22 | 1973 | Significant | Satisfactory |
| Mountain Lake Dam Carroll County | 11 | — | Low | Satisfactory |
| Moore Grafton County | 149 | 1957 | High | Satisfactory |
| Monadnock Paper Indust Lag Dam Hillsborough County | 14 | 1973 | Significant | Satisfactory |
| Monadnock Hillsborough County | 22 | 1923 | Low | Satisfactory |
| Mirror Lake Dam Grafton County | 12 | 1836 | Low | Satisfactory |
| Minnewawa Cheshire County | 63 | 1923 | High | Satisfactory |
| Mine Falls Hillsborough County | 16 | 1889 | Low | Satisfactory |
| Mill Pond Dam Rockingham County | 13 | 1935 | Low | Satisfactory |
| Millen Lake Dam Sullivan County | 23 | 1970 | Significant | Satisfactory |
| Meriden Village Sewage Lagoon Dam Sullivan County | 9 | 1982 | Significant | Satisfactory |
| Meredith Reservoir Dam Belknap County | 25 | 1934 | Low | Satisfactory |
| Meetinghouse Pond Dam Cheshire County | 7 | 1840 | Low | Satisfactory |
| Mcindoes Grafton County | 25 | 1931 | Low | Satisfactory |
| Mcgary Fletcher Rec Pond Dam Sullivan County | 18 | 1978 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.