Upper Flannagan Pond Dam
Key Takeaway
Upper Flannagan Pond Dam is classified as significant hazard in Massachusetts. It was completed in 1955 and is 71 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 | 77 ft |
| Dam Type | Concrete |
| Max Storage | 110 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1955 (71 years old) |
| NID ID | MA00810 |
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
LINDA J. & JOHN H. WESLEY
Private
Nearby Dams
Balch Pond Dam
Middlesex, MA
Significant Hazard 12 ftBalch Pond Dike
Middlesex, MA
Significant Hazard 3 ftPlow Shop Pond Dam
Middlesex, MA
Low Hazard 7 ftLong Pond Dam
Middlesex, MA
Low Hazard 8 ftLower Long Pond Dam
Middlesex, MA
Low Hazard 8 ftIce House
Middlesex, MA
Low Hazard 12 ftSquannacook River Dam
Middlesex, MA
High Hazard 18 ftLost Lake Dam
Middlesex, MA
High Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Upper Flannagan Pond Dam?
Upper Flannagan 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 Upper Flannagan Pond Dam?
Upper Flannagan Pond Dam is owned by LINDA J. & JOHN H. WESLEY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Flannagan Pond Dam built?
Upper Flannagan Pond Dam was completed in 1955, making it 71 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 Upper Flannagan Pond Dam?
Upper Flannagan 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 Upper Flannagan Pond Dam?
Upper Flannagan 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 Upper Flannagan Pond Dam last inspected?
Upper Flannagan Pond Dam was last inspected on May 18, 2012. Inspection dates indicate when a formal review occurred, not the results of that inspection.