Weyerhaeuser Enumclaw Flood Control Dam Reservoir Report

Reservoir Report

Washington

Nearby: Mud Mountain Dam Howard A. Hanson Dam

Last Updated: December 15, 2025

The Weyerhaeuser Enumclaw Flood Control Dam, located in Enumclaw, Washington, serves as a vital structure for flood risk reduction along Boise Creek.

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Summary

Completed in 1993, this private-owned dam stands at a hydraulic height of 30 feet and a structural height of 24 feet, with a capacity to hold 140 acre-feet of water. Despite its modest size with a surface area of 0.1 acres, the dam plays a crucial role in protecting the surrounding area from potential flooding events.

Managed by the Washington Department of Ecology, the Weyerhaeuser Enumclaw Flood Control Dam is state-regulated and regularly inspected to ensure its structural integrity and functionality. With a hazard potential rated as high and a fair condition assessment as of the last inspection in 2015, the dam is equipped to handle maximum discharges of up to 1800 cubic feet per second. Its roller-compacted concrete core and soil foundation contribute to its stability and effectiveness in flood control measures, making it a key asset for water resource and climate enthusiasts in the region.

In the event of an emergency, the dam's emergency action plan (EAP) readiness and adherence to guidelines are critical factors in ensuring public safety. While details on the EAP's preparation and revision dates are currently unavailable, the dam's risk management measures and potential inundation maps are essential components for effective emergency response and risk mitigation. As a significant infrastructure within Congressional District 08 of Washington, the Weyerhaeuser Enumclaw Flood Control Dam highlights the importance of proactive measures in safeguarding communities against the impacts of extreme weather events and climate change.

Year Completed	1993
River Or Stream	Boise Creek
Primary Dam Type	Other
Surface Area	0.1
Hydraulic Height	30
Drainage Area	8.1
Nid Storage	140
Structural Height	24
Hazard Potential	High
Foundations	Soil
Nid Height	30

Explore Interactive Map

WEYERHAEUSER ENUMCLAW FLOOD CONTROL DAM

Reservoir Report • Water Levels • Weather Forecast

December 15, 2025

Year_Completed	1993
River_Or_Stream	Boise Creek
Primary_Dam_Type	Other
Surface_Area	0.1
Hydraulic_Height	30
Drainage_Area	8.1
Nid_Storage	140
Structural_Height	24
Hazard_Potential	High
Foundations	Soil
Nid_Height	30

Seasonal Comparison

Weather Forecast

Nearby Streamflow Levels

White River Above Boise Creek At Buckley 8310.0cfs	8310cfs
Boise Creek At Buckley 9.09cfs	9cfs
White River Below Clearwater River Nr Buckley 2550.0cfs	2550cfs
South Prairie Creek At South Prairie 686.0cfs	686cfs
Newaukum Creek Near Black Diamond 46.9cfs	47cfs
Green River At Purification Plant Near Palmer 8070.0cfs	8070cfs

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.