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 267
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pierce Hillsborough County | 12 | 1921 | Low | Satisfactory |
| Pillsbury Lake Dam Merrimack County | 13 | 1964 | Low | Satisfactory |
| Pittsfield Sewage Lagoon Dam Merrimack County | 18 | 1979 | Significant | Satisfactory |
| Pleasant Lake Dam Merrimack County | 13 | 1850 | High | Satisfactory |
| Pleasant Lake Dam Rockingham County | 7 | 1921 | Low | Satisfactory |
| Pontook Coos County | 15 | 1909 | Low | Satisfactory |
| Powder Mill Hillsborough County | 21 | 1924 | Low | Satisfactory |
| Resort Waste Water Lagoon Dam Coos County | 15 | 1987 | Significant | Satisfactory |
| Rice Reservoir Dam Sullivan County | 48 | 1935 | High | Satisfactory |
| Riverside Coos County | 21 | 1970 | Low | Satisfactory |
| Robbins Pond Dam Cheshire County | 10 | 1918 | Low | Satisfactory |
| 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 |
| Rollinsford Strafford County | 20 | 1910 | Significant | Satisfactory |
| Rowe Dam Strafford County | 15 | 1935 | Low | Satisfactory |
| Rust Pond Dam Carroll County | 8 | — | Significant | Satisfactory |
| Sanborn Sawmill Dam Merrimack County | 13 | 1830 | High | Satisfactory |
| Sawmill Coos County | 15 | 1965 | Low | Satisfactory |
| Scott Bog Pond Dam Coos County | 9 | 1942 | Low | Satisfactory |
| Seaver Reservoir Dam Cheshire County | 30 | 1924 | High | Satisfactory |
| Shelburne Coos County | 17 | 1906 | Low | Satisfactory |
| Shellcamp Pond Dam Belknap County | 12 | 1920 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.