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 1–25 of 162
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ws Packaging Canal Dam Hillsborough County | 15 | 1876 | High | Satisfactory |
| Woodward Pond Dam Cheshire County | 22 | 1836 | High | Satisfactory |
| Wolfeboro Sewage Lagoon Dam Carroll County | 45 | 1975 | High | Fair |
| Wilder Grafton County | 59 | 1950 | High | Satisfactory |
| Whitewater Brook Dam Sullivan County | 95 | 1968 | High | Fair |
| Whites Pond Dam and Dike Merrimack County | 15 | 1890 | High | Satisfactory |
| Webster Lake Dam Merrimack County | 14 | 1873 | High | Satisfactory |
| Weare Reservoir Dam Hillsborough County | 34 | 1913 | High | Poor |
| Warren Lake Dam Cheshire County | 13 | 1771 | High | Poor |
| Walpole Reservoir Dam Cheshire County | 20 | 1901 | High | Poor |
| Verney Mill Hydro Dam Hillsborough County | 25 | 1916 | High | Not Rated |
| Upper Wilson Pond Dam Cheshire County | 17 | 1910 | High | Poor |
| Upper Reservoir Dam Grafton County | 30 | 1924 | High | Fair |
| Upper Kimball Pond Dam Carroll County | 10 | 1800 | High | Poor |
| Uncanoonuc Lake Dike Hillsborough County | 15 | 1954 | High | Fair |
| Uncanoonuc Lake Dam Hillsborough County | 10 | 1936 | High | Satisfactory |
| Turkey Pond Dam Merrimack County | 15 | 1958 | High | Satisfactory |
| Tower Hill Pond Dam Rockingham County | 35 | 1938 | High | Satisfactory |
| Three Mile Reservoir Dam Cheshire County | 20 | 1986 | High | Satisfactory |
| Taylor River Pond Dam Rockingham County | 19 | 1949 | High | Satisfactory |
| Swains Lake Dam Strafford County | 17 | 1890 | High | Satisfactory |
| Surry Mountain Dam Cheshire County | 83 | 1941 | High | Not Available |
| Supply Pond Dam Hillsborough County | 28 | 1854 | High | Fair |
| Sunset Lake Dam Belknap County | 17 | 1860 | High | Poor |
| Sunrise Lake Dam Strafford County | 19 | 1877 | High | Satisfactory |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.