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 126–150 of 185
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Paper Mills Holding Pond Dam Cheshire County | 20 | 1974 | Significant | Fair |
| Pawtuckaway Lake /Drowns Dam Rockingham County | 18 | 1842 | Significant | Poor |
| Pawtuckaway Lake/Gove Dike Rockingham County | 9 | 1842 | Significant | Poor |
| Pea Porridge Pond Middle Little Dam Carroll County | 17 | 1966 | Significant | Fair |
| 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 |
| Pine River Pond Dam Carroll County | 14 | — | Significant | Fair |
| Pittsfield Sewage Lagoon Dam Merrimack County | 18 | 1979 | Significant | Satisfactory |
| Poole Reservoir Dam Cheshire County | 14 | 1926 | Significant | Poor |
| Powwow Pond Dam Rockingham County | 12 | 1935 | Significant | Fair |
| Resort Waste Water Lagoon Dam Coos County | 15 | 1987 | Significant | Satisfactory |
| Rochester Sewage Lagoon Dam Strafford County | 10 | 1980 | Significant | Satisfactory |
| Rockingham Cnty Wastewtr Lagoon Dam Rockingham County | 13 | 1990 | Significant | Satisfactory |
| Rollinsford Strafford County | 20 | 1910 | Significant | Satisfactory |
| Runaway Pond East Dam Merrimack County | 15 | 1814 | Significant | Poor |
| Rust Pond Dam Carroll County | 8 | — | Significant | Satisfactory |
| Sand Pond Dam Cheshire County | 10 | 1920 | Significant | Fair |
| Sargent Center Infiltration Lagoon Hillsborough County | 11 | — | Significant | Not Rated |
| Scott Pond Dam Cheshire County | 10 | 1918 | Significant | Poor |
| Shannon Lake Dam Carroll County | 20 | 1930 | Significant | Fair |
| Shop Pond Dam Rockingham County | 13 | 1930 | Significant | Satisfactory |
| Silica Pond Dam Cheshire County | 9 | 1930 | Significant | Poor |
| Skatutakee Lake Dam Cheshire County | 13 | 1778 | Significant | Satisfactory |
| Somersworth Strafford County | 17 | 1929 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.