Upper Shawme Lake Dam
Upper Shawme Lake Dam is an earth dam located in Barnstable County, Massachusetts. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Upper Shawme Lake Dam
The primary purpose of Upper Shawme Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Sandwich (local government). It impounds the Mill Creek near Sandwich.
The dam stands 12 feet tall and stretches 190 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 234 acre-feet, and collects water from a drainage area of 0 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 12/07/2021.
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Location
| State | Massachusetts |
| County | Barnstable |
| Nearest City | Sandwich |
| River/Stream | Mill Creek |
| Coordinates | 41.75088, -70.50244 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Length | 190 ft |
Storage & Hydraulics
| NID Storage | 234 acre-ft |
| Max Storage | 234 acre-ft |
| Normal Storage | 183 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 142 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Town of Sandwich |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/07/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA02214 |
| Federal ID | MA02214 |
| More Info | State Dam Safety Program |