Factory Pond Dam
Factory Pond Dam is an earth dam located in Plymouth County, Massachusetts, built in 1943. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Factory Pond Dam
The primary purpose of Factory 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 Hanover;town Of Hanson (local government). It impounds the U/s - Drinkwater River, D/s - Indian Head River near Hanson; Hanover.
The dam stands 11 feet tall and stretches 305 feet across, creates a reservoir covering 57 acres, has a maximum storage capacity of 360 acre-feet, and collects water from a drainage area of 22 square miles. Completed in 1943, the structure is well-established, with more than 75 years of service.
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 04/02/2021.
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Location
| State | Massachusetts |
| County | Plymouth |
| Nearest City | Hanson; Hanover |
| River/Stream | U/s - Drinkwater River, D/s - Indian Head River |
| Coordinates | 42.08906, -70.86708 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Length | 305 ft |
| Year Completed | 1943 (83 years old) |
Storage & Hydraulics
| NID Storage | 360 acre-ft |
| Max Storage | 360 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 57 acres |
| Drainage Area | 22 sq mi |
| Max Discharge | 101 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Town of Hanover;Town of Hanson |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/02/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00391 |
| Federal ID | MA00391 |
| More Info | State Dam Safety Program |