Centralia Coal Mine Dam No 36 Reservoir Report
Last Updated: December 15, 2025
Centralia Coal Mine Dam No 36, also known as Widco Dam No.
°F
°F
mph
Wind
%
Humidity
Summary
36, is a public utility-owned structure located in Centralia, Washington. Completed in 1989, this earth dam serves the primary purpose of storing tailings from nearby coal mining operations. With a hydraulic height of 13 feet and a structural height of 10 feet, the dam has a normal storage capacity of 57 acre-feet and a maximum storage capacity of 130 acre-feet.
Situated on Hanaford Creek-Offstream in Lewis County, Centralia Coal Mine Dam No 36 is regulated by the Washington Department of Ecology and falls under the jurisdiction of the state. Despite having a low hazard potential, the dam has not been rated for its condition assessment. With no recent inspection data available, it is crucial for water resource and climate enthusiasts to monitor the maintenance and safety of this dam to ensure its continued functionality and protection of the surrounding environment.
As part of the Seattle District, Congressional District 03 in Washington, the dam plays a crucial role in managing water resources in the region. While its associated structures and inspection frequency are currently unknown, the presence of this dam highlights the importance of infrastructure maintenance and monitoring in the face of changing climate conditions. Stakeholders should stay informed about developments related to Centralia Coal Mine Dam No 36 to safeguard against potential risks and ensure sustainable water resource management in the area.
Year Completed |
1989 |
River Or Stream |
Hanaford Creek-Offstream |
Primary Dam Type |
Earth |
Surface Area |
32 |
Hydraulic Height |
13 |
Drainage Area |
0.1 |
Nid Storage |
130 |
Structural Height |
10 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
13 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Tenino City Park
|
||
Stan Hedwall Park
|
||
Millersylvania State Park
|
||
Millersylvania State Park Campground
|
Centralia Coal Mine Dam No 36