Chehalis Regional Water Reclamation Pond Reservoir Report
Last Updated: December 15, 2025
The Chehalis Regional Water Reclamation Pond in Washington is a significant water resource project that plays a crucial role in managing water resources in the region.
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Summary
Designed by Gibbs & Olson, Inc., this earth dam structure sits off the Chehalis River and serves as a reclamation pond for water treatment purposes. Completed in 2005, it has a hydraulic height of 17 feet and a storage capacity of 11 acre-feet, providing essential water storage for the area.
Managed by the Washington Dept of Ecology, this reclamation pond is state-regulated, inspected, and enforced to ensure its structural integrity and operational efficiency. The dam's condition assessment in 2018 deemed it satisfactory, with a significant hazard potential. The pond covers a surface area of 0.83 acres and has a normal storage capacity of 8 acre-feet, contributing to water management and environmental conservation efforts in Lewis County, Washington.
With a strategic location in S30 T14 R2W, the Chehalis Regional Water Reclamation Pond serves as a critical component of the region's water infrastructure. As a local government-owned facility, it underscores the importance of sustainable water resource management and climate resilience. As water resource and climate enthusiasts, the pond's design, construction, and operational details offer valuable insights into how innovative engineering solutions can address water challenges and promote environmental stewardship.
Year Completed |
2005 |
River Or Stream |
Chehalis River - offstream |
Primary Dam Type |
Earth |
Surface Area |
0.83 |
Hydraulic Height |
17 |
Nid Storage |
11 |
Structural Height |
17 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Newaukum River Near Chehalis
|
1330cfs |
Chehalis River Near Adna
|
2050cfs |
Skookumchuck River Near Bucoda
|
872cfs |
Chehalis River Near Grand Mound
|
8340cfs |
Nf Newaukum River Above Bear Creek Near Forest
|
278cfs |
Chehalis River Near Doty
|
831cfs |
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.
Chehalis Regional Water Reclamation Pond