Centralia Coal Mine Dam No 3c South
Key Takeaway
Centralia Coal Mine Dam No 3c South is classified as significant hazard in Washington. It was completed in 1987 and is 39 years old. Its primary use is tailings. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Length | 1,283 ft |
| Dam Type | Earth |
| Max Storage | 9.6K acre-ft |
| Normal Storage | 6.0K acre-ft |
| Surface Area | 72 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 150 cfs |
| Year Completed | 1987 (39 years old) |
| NID ID | WA00529 |
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
TransAlta Centralia Mining LLC
Public Utility
Nearby Dams
Centralia Coal Mine Dam No 3c East
Lewis, WA
Significant HazardCentralia Coal Mine Dam No 3c North
Lewis, WA
Significant HazardCentralia Coal Mine Dam No 44
Lewis, WA
Low HazardCentralia Coal Mine Dam No 3a
Lewis, WA
Low HazardCentralia Coal Mine Dam No 3b
Lewis, WA
Significant HazardCentralia Coal Mine Dam No 5c
Lewis, WA
Low HazardCentralia Coal Mine Dam No 6b
Lewis, WA
Low HazardCentralia Coal Mine Dam No 5
Lewis, WA
Low HazardFrequently Asked Questions
What is the hazard classification of Centralia Coal Mine Dam No 3c South?
Centralia Coal Mine Dam No 3c South 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 Centralia Coal Mine Dam No 3c South?
Centralia Coal Mine Dam No 3c South is owned by TransAlta Centralia Mining LLC (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Centralia Coal Mine Dam No 3c South built?
Centralia Coal Mine Dam No 3c South was completed in 1987, making it 39 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 Centralia Coal Mine Dam No 3c South?
Centralia Coal Mine Dam No 3c South serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Centralia Coal Mine Dam No 3c South last inspected?
Centralia Coal Mine Dam No 3c South was last inspected on August 8, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.