Neponset River Dam
Neponset River Dam is a stone dam located in Norfolk County, Massachusetts, built in 1850. It carries a Low hazard potential classification and has a poor condition assessment.
About Neponset River Dam
Neponset River Dam is a dam in Norfolk, Massachusetts. The dam is owned by Town Of Walpole (local government). It impounds the Neponset River near Walpole.
The dam stands 15 feet tall and stretches 150 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 153 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1850, the structure is one of the older dams in the region, with over a century and a half of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 03/28/2019.
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Location
| State | Massachusetts |
| County | Norfolk |
| Nearest City | Walpole |
| River/Stream | Neponset River |
| Coordinates | 42.13551, -71.25037 |
Physical Characteristics
| Dam Type | Stone |
| NID Height | 15 ft |
| Dam Length | 150 ft |
| Year Completed | 1850 (176 years old) |
Storage & Hydraulics
| NID Storage | 153 acre-ft |
| Max Storage | 153 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 10 sq mi |
Ownership & Safety
| Owner | Town of Walpole |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 03/28/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MA03137 |
| Federal ID | MA03137 |
| More Info | State Dam Safety Program |