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 176–200 of 664
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Robb Reservoir Dam Cheshire County | 13 | 1912 | Low | Fair |
| Robbins Pond Dam Cheshire County | 10 | 1918 | Low | Satisfactory |
| Riverside Coos County | 21 | 1970 | Low | Satisfactory |
| Rivermill Mascoma Hydro Dam Grafton County | 22 | 1920 | High | Poor |
| Riverdale Dam Hillsborough County | 10 | — | Low | Not Rated |
| Richardson Pond Dam Strafford County | 8 | 1935 | Low | Poor |
| Richardson Brook Pond Dam Sullivan County | 12 | 1968 | Low | Poor |
| Rice Reservoir Dam Sullivan County | 48 | 1935 | High | Satisfactory |
| Resort Waste Water Lagoon Dam Coos County | 15 | 1987 | Significant | Satisfactory |
| Reservoir Pond Dam Grafton County | 11 | 1900 | Low | Poor |
| Red Leaf Pond Dam Sullivan County | 8 | 1892 | Low | Not Rated |
| Red Hill Pond Dam Carroll County | 7 | 1870 | Low | Poor |
| Recreation Pond Dam Merrimack County | 8 | 1950 | Low | Fair |
| Ragged Mountain Snow Pond Dam Merrimack County | 49 | 1988 | Low | Fair |
| Putney Meadow Pond Dam Merrimack County | 8 | 1800 | Low | Poor |
| Purity Lake Dam Carroll County | 13 | 1750 | High | Poor |
| Pratt Pond Spillway Section Hillsborough County | 6 | 1935 | Low | Fair |
| Pratt Pond Dike Hillsborough County | 9 | — | Low | Fair |
| Pratt Pond Dam Hillsborough County | 9 | 1935 | Low | Fair |
| Pratt Pond Dam Hillsborough County | 7 | 1890 | Low | Poor |
| Powwow Pond Dam Rockingham County | 12 | 1935 | Significant | Fair |
| Powder Mill Hillsborough County | 21 | 1924 | Low | Satisfactory |
| Poole Reservoir Dam Cheshire County | 14 | 1926 | Significant | Poor |
| Pontook Coos County | 15 | 1909 | Low | Satisfactory |
| Pleasant Lake Dam Merrimack County | 13 | 1850 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.