WYNOOCHEE LAKE NEAR GRISDALE

RESERVOIR LEVELS
February 18, 2025


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Wynoochee, a gravity dam located in Grays Harbor, Washington, is a key water resource and climate infrastructure owned by the local government. Built in 1972 by the U.S. Army Corps of Engineers, this dam serves multiple important purposes including water supply, flood risk reduction, hydroelectric power generation, recreation, and fish and wildlife habitat enhancement. With a maximum storage capacity of 76,000 acre-feet and a normal storage capacity of 69,405 acre-feet, Wynoochee plays a crucial role in managing water resources in the region.

The dam, standing at a height of 175 feet and stretching 1,700 feet in length, has a controlled spillway with a width of 64 feet. The structure is designed to withstand high hazard potential and is regularly inspected by the Federal Energy Regulatory Commission to ensure its safety and functionality. Despite its age, Wynoochee remains a vital component of the local water supply infrastructure, providing essential services to the surrounding community while also supporting ecological and recreational activities along the Wynoochee River.

As climate change continues to impact water resources and infrastructure across the country, the role of dams like Wynoochee in managing water supply, flood risks, and ecosystem health becomes increasingly critical. With its strategic location and multifaceted benefits, Wynoochee stands as a testament to the importance of sustainable water resource management in the face of a changing climate.

Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft 24hr Change -0.02%
Percent of Normal 100%
Minimum 735.92 ft
2016-10-02
Maximum 799.99 ft
2013-06-02
Average 771 ft
Dam_Height 175
Hydraulic_Height 170
Drainage_Area 41
Year_Completed 1972
Nid_Storage 76000
Hazard_Potential High
Structural_Height 175
Primary_Dam_Type Gravity
River_Or_Stream Wynoochee River
Foundations Rock
Surface_Area 1126
Outlet_Gates Slide (sluice gate) - 2, Tainter (radial) - 2
Dam_Length 1700
Nid_Height 175
Reservoir Levels
       

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