Patch Reservoir Dam
Key Takeaway
Patch Reservoir Dam is classified as high hazard in Massachusetts. It was completed in 1896 and is 130 years old. Its primary use is recreation. 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 | 9 ft (taller than 12.4% in MA) |
| Dam Length | 65 ft |
| Dam Type | Masonry |
| Max Storage | 229 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 10 sq mi |
| Year Completed | 1896 (130 years old) |
| NID ID | MA00122 |
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 WORCESTER, DEPARTMENT OF PUBLIC WORKS & PARKS
Local Government
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High Hazard 61 ftFrequently Asked Questions
What is the hazard classification of Patch Reservoir Dam?
Patch Reservoir 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 Patch Reservoir Dam?
Patch Reservoir Dam is owned by CITY OF WORCESTER, DEPARTMENT OF PUBLIC WORKS & PARKS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Patch Reservoir Dam built?
Patch Reservoir Dam was completed in 1896, making it 130 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 Patch Reservoir Dam?
Patch Reservoir 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 Patch Reservoir Dam?
Patch Reservoir 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 Patch Reservoir Dam last inspected?
Patch Reservoir Dam was last inspected on October 9, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.