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 426–450 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Oyster Reservoir Dam Strafford County | 21 | 1934 | Significant | Fair |
| Paper Mill Hillsborough County | 9 | 1922 | Low | Satisfactory |
| Paper Mills Holding Pond Dam Cheshire County | 20 | 1974 | Significant | Fair |
| Pawtuckaway Lake Dollof Dam Rockingham County | 28 | 1842 | High | Poor |
| Pawtuckaway Lake /Drowns Dam Rockingham County | 18 | 1842 | Significant | Poor |
| Pawtuckaway Lake/ Drowns Dike Rockingham County | 12 | 1842 | Low | Poor |
| Pawtuckaway Lake/Gove Dike Rockingham County | 9 | 1842 | Significant | Poor |
| Pea Porridge Pond Middle Little Dam Carroll County | 17 | 1966 | Significant | Fair |
| Pearley Terrill Dam Coos County | 14 | 1965 | Low | Not Rated |
| Pearl Lake Dam Grafton County | 10 | 1930 | Low | Poor |
| Pearly Pond Dam Cheshire County | 7 | 1935 | Low | Fair |
| Pembroke Merrimack County | 26 | 1891 | Low | Satisfactory |
| Pemigewasset River Levee Grafton County | 15 | 1960 | High | Satisfactory |
| Penacook Lake Dam Merrimack County | 9 | 1873 | High | Poor |
| Penacook Lower Falls Diversion Merrimack County | 15 | 1982 | Low | Satisfactory |
| Penacook Upper Falls Merrimack County | 23 | 1987 | Low | Satisfactory |
| Pequawket Pond Dam Carroll County | 15 | — | Low | Fair |
| Perkins Pond Dam Cheshire County | 7 | 1935 | Low | Fair |
| Perkins Pond Marsh Dam Hillsborough County | 15 | 1924 | Low | Satisfactory |
| Perry Pond Dam Coos County | 7 | 1947 | Undetermined | Poor |
| Peterborough Treatment Lagoon Dam Hillsborough County | 9 | 1972 | Significant | Fair |
| Peters Farm Pond Dam Hillsborough County | 9 | 1856 | Significant | Unsatisfactory |
| Pheasant Ridge Cc Pond Dam Belknap County | 25 | 1976 | Significant | Fair |
| Phillips Pond Dam Coos County | 15 | 1926 | Low | Not Rated |
| Pickering Ponds Dam Strafford County | 24 | 1980 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.