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 101–125 of 162
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Oliverian Dam Grafton County | 52 | 1962 | High | Satisfactory |
| Otter Brook Dam Cheshire County | 119 | 1958 | High | Not Available |
| Pawtuckaway Lake Dollof Dam Rockingham County | 28 | 1842 | High | Poor |
| Pemigewasset River Levee Grafton County | 15 | 1960 | High | Satisfactory |
| Penacook Lake Dam Merrimack County | 9 | 1873 | High | Poor |
| Pickpocket Dam Rockingham County | 15 | 1920 | High | Poor |
| Pierce Pond Dam Hillsborough County | 8 | 1700 | High | Poor |
| Pisgah Reservoir Dam Cheshire County | 33 | 1870 | High | Poor |
| Pittsfield Mill Dam Merrimack County | 21 | 1920 | High | Poor |
| Pleasant Lake Dam Merrimack County | 13 | 1850 | High | Satisfactory |
| Purity Lake Dam Carroll County | 13 | 1750 | High | Poor |
| Rice Reservoir Dam Sullivan County | 48 | 1935 | High | Satisfactory |
| Rivermill Mascoma Hydro Dam Grafton County | 22 | 1920 | High | Poor |
| 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 |
| Sanborn Pond Grist Mill Dam Merrimack County | 16 | 1830 | High | Fair |
| Sanborn Sawmill Dam Merrimack County | 13 | 1830 | High | Satisfactory |
| Sargent Lake Dam Belknap County | 17 | 1870 | High | Poor |
| Sawyer Lake Dam Belknap County | 19 | 1916 | High | Poor |
| Seaver Reservoir Dam Cheshire County | 30 | 1924 | High | Satisfactory |
| Smith Pond Dam Grafton County | 12 | 1830 | High | Fair |
| Souhegan River Site 10a Dam Hillsborough County | 59 | 1966 | High | Satisfactory |
| Souhegan River Site 12a North Dike Hillsborough County | 39 | 1965 | High | Fair |
| Souhegan River Site 12a South Dam Hillsborough County | 38 | 1965 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.