Centralia Coal Mine Dam No 3d Reservoir Report
Last Updated: December 15, 2025
Centralia Coal Mine Dam No 3d, also known as Widco Dam No.
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Summary
3d, is a crucial structure located in Centralia, Washington, that serves the primary purpose of managing tailings. This earth dam, with a stone core and rock foundation, stands at a hydraulic height of 285 feet and was completed in 1988. With a storage capacity of 15,000 acre-feet and a surface area of 200 acres, the dam plays a vital role in regulating the flow of water in Tr-Packwood Creek.
Operated by a public utility, Centralia Coal Mine Dam No 3d is regulated by the Washington Department of Ecology and undergoes regular inspections to ensure its structural integrity. Despite being classified as having a low hazard potential, the dam's condition assessment is currently listed as "Not Rated." Emergency action plans are being evaluated, and risk management measures are being considered to mitigate any potential risks associated with the dam.
Located in Lewis County, Washington, Centralia Coal Mine Dam No 3d is a significant asset in the local water resource management system. With its strategic placement and reliable operation, the dam continues to play a crucial role in safeguarding the surrounding environment and communities from water-related hazards.
Year Completed |
1988 |
River Or Stream |
Tr-Packwood Creek |
Primary Dam Type |
Earth |
Surface Area |
200 |
Hydraulic Height |
285 |
Drainage Area |
0.5 |
Nid Storage |
15000 |
Structural Height |
285 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
285 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Centralia Coal Mine Dam No 3d