Green Hill Pond Dam
Green Hill Pond Dam is an earth dam located in Worcester County, Massachusetts, built in 1850. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Green Hill Pond Dam
The primary purpose of Green Hill Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Worcester (local government). It impounds the Hermitage Brook near Worcester.
The dam stands 25 feet tall and stretches 352 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 445 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1850, the structure is one of the older dams in the region, with over a century and a half of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. 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 02/21/2023.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Massachusetts dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Massachusetts |
| County | Worcester |
| Nearest City | Worcester |
| River/Stream | Hermitage Brook |
| Coordinates | 42.28164, -71.78398 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Length | 352 ft |
| Year Completed | 1850 (176 years old) |
Storage & Hydraulics
| NID Storage | 445 acre-ft |
| Max Storage | 445 acre-ft |
| Normal Storage | 229 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 48 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Worcester |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/21/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00149 |
| Federal ID | MA00149 |
| More Info | State Dam Safety Program |