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 51–75 of 185
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Poole Reservoir Dam Cheshire County | 14 | 1926 | Significant | Poor |
| Pittsfield Sewage Lagoon Dam Merrimack County | 18 | 1979 | Significant | Satisfactory |
| Pine River Pond Dam Carroll County | 14 | — | Significant | Fair |
| Pheasant Ridge Cc Pond Dam Belknap County | 25 | 1976 | Significant | Fair |
| Peters Farm Pond Dam Hillsborough County | 9 | 1856 | Significant | Unsatisfactory |
| Peterborough Treatment Lagoon Dam Hillsborough County | 9 | 1972 | Significant | Fair |
| Pea Porridge Pond Middle Little Dam Carroll County | 17 | 1966 | Significant | Fair |
| Pawtuckaway Lake/Gove Dike Rockingham County | 9 | 1842 | Significant | Poor |
| Pawtuckaway Lake /Drowns Dam Rockingham County | 18 | 1842 | Significant | Poor |
| Paper Mills Holding Pond Dam Cheshire County | 20 | 1974 | Significant | Fair |
| Oyster Reservoir Dam Strafford County | 21 | 1934 | Significant | Fair |
| Otis Falls Hillsborough County | 27 | 1982 | Significant | Satisfactory |
| Old Mill Pond Dam Rockingham County | 11 | 1930 | Significant | Satisfactory |
| Nubanusit Lake Dam Cheshire County | 16 | 1861 | Significant | Poor |
| 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 |
| Mwh Sewage Lagoons Dam Coos County | 19 | 2000 | Significant | Fair |
| 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 Brook Reservoir Dam Cheshire County | 18 | 1951 | Significant | Fair |
| Morgan Pond Dam Sullivan County | 12 | 1939 | Significant | Fair |
| Moose Falls Dam Coos County | 10 | 1950 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.