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 2650 of 162

Dam NameHeight (ft)YearHazardCondition
Suncook Lake Dam

Belknap County

161882HighPoor
Stratford Bog Pond Dam

Coos County

161934HighPoor
Squam Lake

Grafton County

171856HighSatisfactory
Spectacle Pond Dam

Grafton County

71915HighSatisfactory
Souhegan Site 8 Dam

Hillsborough County

251977HighSatisfactory
Souhegan Site 14 Dam

Hillsborough County

281836HighFair
Souhegan River Site 35 Dam

Hillsborough County

301965HighFair
Souhegan River Site 33 Dam

Hillsborough County

211971HighFair
Souhegan River Site 28 Dam

Hillsborough County

291964HighSatisfactory
Souhegan River Site 26 Dam

Hillsborough County

791965HighFair
Souhegan River Site 25b Dam

Hillsborough County

741967HighFair
Souhegan River Site 19 Dam

Hillsborough County

361962HighFair
Souhegan River Site 12a South Dam

Hillsborough County

381965HighFair
Souhegan River Site 12a North Dike

Hillsborough County

391965HighFair
Souhegan River Site 10a Dam

Hillsborough County

591966HighSatisfactory
Smith Pond Dam

Grafton County

121830HighFair
Seaver Reservoir Dam

Cheshire County

301924HighSatisfactory
Sawyer Lake Dam

Belknap County

191916HighPoor
Sargent Lake Dam

Belknap County

171870HighPoor
Sanborn Sawmill Dam

Merrimack County

131830HighSatisfactory
Sanborn Pond Grist Mill Dam

Merrimack County

161830HighFair
Rochester Reservoir Dike Spillway

Strafford County

21935HighSatisfactory
Rochester Reservoir Dam

Strafford County

261935HighSatisfactory
Robinhood Park Reservoir Dam

Cheshire County

181872HighSatisfactory
Rivermill Mascoma Hydro Dam

Grafton County

221920HighPoor
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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.