Thirty Acre Pond Dam
Key Takeaway
Thirty Acre Pond Dam is classified as high hazard in Massachusetts. It was completed in 1936 and is 90 years old. Its primary use is flood risk reduction. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 13 ft (taller than 39.5% in MA) |
| Dam Length | 600 ft |
| Dam Type | Gravity |
| Max Storage | 230 acre-ft |
| Normal Storage | 125 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 4 sq mi |
| Year Completed | 1936 (90 years old) |
| NID ID | MA00423 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
CITY OF BROCKTON, OFFICE OF THE MAYOR
Local Government
Nearby Dams
Ellis Brett Pond Dam
Plymouth, MA
High Hazard 11 ftLower Porter Pond Dam
Plymouth, MA
Significant Hazard 9 ftCross Pond Dam
Plymouth, MA
Significant Hazard 7 ftUpper Porter Pond Dam
Plymouth, MA
Significant Hazard 11 ftWaldo Lake Dam
Plymouth, MA
High Hazard 18 ftBrockton Reservoir Dam
Norfolk, MA
Significant Hazard 17 ftFrench Pond Dam
Bristol, MA
Significant Hazard 12 ftAmes Pond Dam
Bristol, MA
Low Hazard 6 ftFrequently Asked Questions
What is the hazard classification of Thirty Acre Pond Dam?
Thirty Acre Pond Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Thirty Acre Pond Dam?
Thirty Acre Pond Dam is owned by CITY OF BROCKTON, OFFICE OF THE MAYOR (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Thirty Acre Pond Dam built?
Thirty Acre Pond Dam was completed in 1936, making it 90 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Thirty Acre Pond Dam?
Thirty Acre Pond Dam serves the following purposes: Flood Risk Reduction, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Thirty Acre Pond Dam?
Thirty Acre Pond Dam has a dam height of 13 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Thirty Acre Pond Dam last inspected?
Thirty Acre Pond Dam was last inspected on December 6, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.