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 476–500 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ragged Mountain Snow Pond Dam Merrimack County | 49 | 1988 | Low | Fair |
| Recreation Pond Dam Merrimack County | 8 | 1950 | Low | Fair |
| Red Hill Pond Dam Carroll County | 7 | 1870 | Low | Poor |
| Red Leaf Pond Dam Sullivan County | 8 | 1892 | Low | Not Rated |
| Reservoir Pond Dam Grafton County | 11 | 1900 | Low | Poor |
| Resort Waste Water Lagoon Dam Coos County | 15 | 1987 | Significant | Satisfactory |
| Rice Reservoir Dam Sullivan County | 48 | 1935 | High | Satisfactory |
| Richardson Brook Pond Dam Sullivan County | 12 | 1968 | Low | Poor |
| Richardson Pond Dam Strafford County | 8 | 1935 | Low | Poor |
| Riverdale Dam Hillsborough County | 10 | — | Low | Not Rated |
| Rivermill Mascoma Hydro Dam Grafton County | 22 | 1920 | High | Poor |
| Riverside Coos County | 21 | 1970 | Low | Satisfactory |
| Robbins Pond Dam Cheshire County | 10 | 1918 | Low | Satisfactory |
| Robb Reservoir Dam Cheshire County | 13 | 1912 | Low | Fair |
| Robinhood Park Reservoir Dam Cheshire County | 18 | 1872 | High | Satisfactory |
| Rochester Reservoir Dam Strafford County | 26 | 1935 | High | Satisfactory |
| Rochester Reservoir Dike Spillway Strafford County | 2 | 1935 | High | Satisfactory |
| Rochester Sewage Lagoon Dam Strafford County | 10 | 1980 | Significant | Satisfactory |
| Rockingham Cnty Wastewtr Lagoon Dam Rockingham County | 13 | 1990 | Significant | Satisfactory |
| Rockwood Pond Dam Cheshire County | 11 | 1915 | Low | Fair |
| Rodgers Pond Dam Cheshire County | 14 | 1922 | Low | Fair |
| Rollinsford Strafford County | 20 | 1910 | Significant | Satisfactory |
| Rollins Pond Dam Belknap County | 17 | 1800 | Low | Poor |
| Rowe Dam Strafford County | 15 | 1935 | Low | Satisfactory |
| Runaway Pond East Dam Merrimack County | 15 | 1814 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.