Spectacle Pond Dam in GROTON, New Hampshire, is a privately owned structure regulated by the NHDES DAM BUREAU.
Wind
Humidity
Built in 1915, this earth dam stands at a height of 7 feet and has a storage capacity of 140 acre-feet, primarily serving recreational purposes for the local community. The dam impounds the TR COCKERMOUTH RIVER, with a drainage area of 0.35 square miles and a surface area of 58 acres.
Despite a high hazard potential, Spectacle Pond Dam is currently in satisfactory condition, as per the latest assessment in October 2017. Regular inspections are conducted every two years, with the last one taking place in July 2019. Although the dam has an uncontrolled spillway and moderate risk assessment, there are no associated locks or outlet gates. Emergency action plans are not prepared, but risk management measures and inundation maps have not been reported. With a risk level of 3 out of 5, the dam continues to provide vital recreational opportunities while facing ongoing monitoring for safety and maintenance.
Year Completed |
1915 |
Dam Length |
46 |
Dam Height |
7 |
River Or Stream |
TR COCKERMOUTH RIVER |
Primary Dam Type |
Earth |
Surface Area |
58 |
Drainage Area |
0.35 |
Nid Storage |
140 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
7 |