Lower Porter Pond Dam
Key Takeaway
Lower Porter Pond Dam is classified as significant hazard in Massachusetts. It was completed in 1940 and is 86 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 9 ft (taller than 12.4% in MA) |
| Dam Length | 200 ft |
| Dam Type | Earth |
| Max Storage | 50 acre-ft |
| Normal Storage | 24 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 4 sq mi |
| Year Completed | 1940 (86 years old) |
| NID ID | MA00424 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
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
Upper Porter Pond Dam
Plymouth, MA
Significant Hazard 11 ftThirty Acre Pond Dam
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High Hazard 13 ftEllis Brett Pond Dam
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High Hazard 11 ftWaldo Lake Dam
Plymouth, MA
High Hazard 18 ftCross Pond Dam
Plymouth, MA
Significant Hazard 7 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 Lower Porter Pond Dam?
Lower Porter Pond Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lower Porter Pond Dam?
Lower Porter 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 Lower Porter Pond Dam built?
Lower Porter Pond Dam was completed in 1940, making it 86 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 Lower Porter Pond Dam?
Lower Porter Pond Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lower Porter Pond Dam?
Lower Porter Pond Dam has a dam height of 9 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 Lower Porter Pond Dam last inspected?
Lower Porter Pond Dam was last inspected on February 8, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.