Mason Road Dam
Mason Road Dam is a stone dam located in Middlesex County, Massachusetts, built in 1870. It carries a Low hazard potential classification and has a poor condition assessment.
About Mason Road Dam
The primary purpose of Mason Road Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by John M. And Barbara Delaney;town Of Townsend (local government). It impounds the Squannacook River near Townsend.
The dam stands 11 feet tall and stretches 140 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 55 acre-feet, and collects water from a drainage area of 42 square miles. Completed in 1870, 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 06/06/2023.
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Location
| State | Massachusetts |
| County | Middlesex |
| Nearest City | Townsend |
| River/Stream | Squannacook River |
| Coordinates | 42.67897, -71.74020 |
Physical Characteristics
| Dam Type | Stone |
| NID Height | 11 ft |
| Dam Length | 140 ft |
| Year Completed | 1870 (156 years old) |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Max Storage | 55 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 42 sq mi |
| Max Discharge | 700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | John M. and Barbara Delaney;Town of Townsend |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/06/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MA00747 |
| Federal ID | MA00747 |
| More Info | State Dam Safety Program |