WYNOOCHEE LAKE NEAR GRISDALE
Reservoir Levels • Weather • Hydrology
Wynoochee Lake is a reservoir located near Grisdale, Washington. The lake was created in 1961 by the construction of the Wynoochee Dam on the Wynoochee River. The dam was built to provide hydroelectric power, flood control, and irrigation water. The lake has a capacity of 120,000 acre-feet and provides water to the Chehalis River Basin for agriculture and municipal uses. The hydrology of the lake is influenced by both surface flow and snowpack. The lake is surrounded by the Olympic National Forest and is a popular destination for recreational activities such as fishing, boating, hiking, and camping. The lake is also home to several species of fish, including rainbow trout, cutthroat trout, and kokanee salmon.
May 20, 2024
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| Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft 24hr Change | 0% |
| Percent of Normal | 100% |
| Minimum |
735.92 ft
2016-10-02 |
| Maximum |
799.99 ft
2013-06-02 |
| Average | 793 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 |
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