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 76–100 of 185
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Monadnock Paper Indust Lag Dam Hillsborough County | 14 | 1973 | Significant | Satisfactory |
| Milton Waste Water Lagoons Dam Strafford County | 20 | 1985 | Significant | Fair |
| Milton Leatherboard Dam Strafford County | 32 | 1904 | Significant | Poor |
| Mill Pond Dam Cheshire County | 16 | 1937 | Significant | Fair |
| Millen Lake Dam Sullivan County | 23 | 1970 | Significant | Satisfactory |
| Meriden Village Sewage Lagoon Dam Sullivan County | 9 | 1982 | Significant | Satisfactory |
| Melvin River Dam Carroll County | 17 | 1930 | Significant | Poor |
| Mcgary Fletcher Rec Pond Dam Sullivan County | 18 | 1978 | Significant | Satisfactory |
| May Pond Dam Sullivan County | 14 | 1830 | Significant | Fair |
| Lyford Pond Dam Merrimack County | 15 | 1840 | Significant | Poor |
| Lower Wilson Pond Dam Cheshire County | 18 | 1925 | Significant | Satisfactory |
| Lower Valley Sullivan County | 33 | 1921 | Significant | Satisfactory |
| Lower Mountain Lake Dam Grafton County | 33 | 1967 | Significant | Satisfactory |
| Lower Ipc Dam Grafton County | 16 | 1930 | Significant | Fair |
| Lower Great Falls Strafford County | 36 | 1984 | Significant | Satisfactory |
| Long Pond Dam Grafton County | 12 | 1933 | Significant | Not Rated |
| Lisbon Wastewater Lagoons Dam Grafton County | 13 | — | Significant | Satisfactory |
| Lincoln Sewage Lagoon Dam Grafton County | 19 | 1975 | Significant | Satisfactory |
| Lebanon Water Treatment Intake Dam Grafton County | 16 | 1934 | Significant | Satisfactory |
| Lakeport Belknap County | 10 | 1958 | Significant | Satisfactory |
| Lake Kanasatka Dam Carroll County | 17 | 1928 | Significant | Poor |
| Kenneth Hill Pond Dam Strafford County | 12 | 1970 | Significant | Poor |
| Jones Pond Dike Carroll County | 12 | 1981 | Significant | Poor |
| Jaffrey Sewage Lagoon Dam Cheshire County | 25 | 1984 | Significant | Fair |
| Jackson Pond Dam Belknap County | 12 | 1894 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.