Stillwater Dam
Stillwater Dam is an earth dam located in Franklin County, Massachusetts. It carries a Significant hazard potential classification and has a fair condition assessment.
About Stillwater Dam
The primary purpose of Stillwater Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lgw Holdings, Llc (private). It impounds the Plympton Brook near Wendell.
The dam stands 17 feet tall and stretches 700 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 1 square miles.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 10/20/2022.
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Location
| State | Massachusetts |
| County | Franklin |
| Nearest City | Wendell |
| River/Stream | Plympton Brook |
| Coordinates | 42.52417, -72.41615 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Length | 700 ft |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 182 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | LGW Holdings, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/20/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00517 |
| Federal ID | MA00517 |
| More Info | State Dam Safety Program |