Flag Lake Dam
Key Takeaway
Flag Lake Dam is classified as low hazard in Louisiana. It was completed in 1940 and is 86 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 11 ft (taller than 16.4% in LA) |
| Dam Length | 2,720 ft |
| Dam Type | Earth |
| Max Storage | 4.2K acre-ft |
| Normal Storage | 3.0K acre-ft |
| Surface Area | 660 acres |
| Drainage Area | 34 sq mi |
| Max Discharge | 3,060 cfs |
| Year Completed | 1940 (86 years old) |
| Year Modified | 1997 |
| NID ID | LA00173 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
USAF AFGSC
Federal Government
Nearby Dams
Austin Lake Dam
Bossier, LA
Low Hazard 13 ftHarmon Lake Dam
Bossier, LA
Low Hazard 25 ftAc Skannal No 1
Bossier, LA
Low Hazard 14 ftAc Skannal No 2
Bossier, LA
Low Hazard 14 ftDogwood Park Lake I
Bossier, LA
Low Hazard 20 ftAc Skannal No 3
Bossier, LA
Low Hazard 17 ftGray Lake Dam
Bossier, LA
Significant Hazard 16 ftAc Skannal No 4
Bossier, LA
Low Hazard 23 ftFrequently Asked Questions
What is the hazard classification of Flag Lake Dam?
Flag Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Flag Lake Dam?
Flag Lake Dam is owned by USAF AFGSC (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Flag Lake Dam built?
Flag Lake 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 Flag Lake Dam?
Flag Lake Dam serves the following purposes: Flood Risk Reduction, Fish And Wildlife Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Flag Lake Dam?
Flag Lake Dam has a dam height of 11 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 Flag Lake Dam last inspected?
Flag Lake Dam was last inspected on March 31, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.