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

All Dams in New Hampshire

Showing 576600 of 664

Dam NameHeight (ft)YearHazardCondition
Sunapee Lake Dam

Sullivan County

141872SignificantNot Rated
Suncook Lake Dam

Belknap County

161882HighPoor
Sunrise Lake Dam

Strafford County

191877HighSatisfactory
Sunset Lake Dam

Belknap County

171860HighPoor
Supply Pond Dam

Hillsborough County

281854HighFair
Surry Mountain Dam

Cheshire County

831941HighNot Available
Swains Lake Dam

Strafford County

171890HighSatisfactory
Swanzey Lake Dam

Cheshire County

121790LowFair
Sweetwater

Sullivan County

331922SignificantSatisfactory
Tannery Pond Dam

Merrimack County

121850LowSatisfactory
Taylor Pond Dam

Hillsborough County

121965LowFair
Taylor Reservoir Dam

Rockingham County

211918SignificantPoor
Taylor River Pond Dam

Rockingham County

191949HighSatisfactory
Taylor River Pond Dam

Rockingham County

141935UndeterminedNot Rated
Thorndike Pond Dam

Cheshire County

131915LowSatisfactory
Thornwood Commons Pond Dam

Strafford County

161961SignificantSatisfactory
Three Mile Reservoir Dam

Cheshire County

201986HighSatisfactory
Thurston Pond Dam

Rockingham County

91772UndeterminedNot Rated
Todd Lake Dam

Merrimack County

171858SignificantPoor
Tower Hill Pond Dam

Rockingham County

351938HighSatisfactory
Transfer Station Lagoons Dam

Merrimack County

SignificantUnsatisfactory
Troy Sewage Lagoons Dam

Cheshire County

161983SignificantSatisfactory
Turkey Pond Dam

Merrimack County

151958HighSatisfactory
Turtle Pond Dam

Merrimack County

81932LowPoor
Tyler Tree Farm Dam

Grafton County

251969SignificantFair
PreviousPage 24 of 27Next

Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.