Straits Pond Dam
Straits Pond Dam is a concrete dam located in Norfolk County, Massachusetts, built in 1908. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Straits Pond Dam
The primary purpose of Straits Pond Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Town Of Cohasset;town Of Hingham;town Of Hull (local government). It impounds the Tributary Of Weir River near Hingham; Hull; Cohasset.
The dam stands 12 feet tall and stretches 80 feet across, creates a reservoir covering 97 acres, has a maximum storage capacity of 950 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1908, the structure is over a century old.
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 07/19/2021.
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Location
| State | Massachusetts |
| County | Norfolk |
| Nearest City | Hingham; Hull; Cohasset |
| River/Stream | Tributary Of Weir River |
| Coordinates | 42.26048, -70.84451 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 12 ft |
| Dam Length | 80 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 950 acre-ft |
| Max Storage | 950 acre-ft |
| Normal Storage | 302 acre-ft |
| Surface Area | 97 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 723 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Town of Cohasset;Town of Hingham;Town of Hull |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/19/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA01101 |
| Federal ID | MA01101 |
| More Info | State Dam Safety Program |