City Mills Pond Dam
City Mills Pond Dam is an earth dam located in Norfolk County, Massachusetts, built in 1935. It carries a Significant hazard potential classification and has a poor condition assessment.
About City Mills Pond Dam
The primary purpose of City Mills Pond Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Town Of Norfolk (local government). It impounds the Mill River near Norfolk.
The dam stands 19 feet tall and stretches 150 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 141 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1935, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 09/23/2021.
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Location
| State | Massachusetts |
| County | Norfolk |
| Nearest City | Norfolk |
| River/Stream | Mill River |
| Coordinates | 42.10944, -71.36184 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Length | 150 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 141 acre-ft |
| Max Storage | 141 acre-ft |
| Normal Storage | 66 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 382 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Town of Norfolk |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 09/23/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00818 |
| Federal ID | MA00818 |
| More Info | State Dam Safety Program |