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Kachess River

Central Washington geography stubsRivers of Kittitas County, WashingtonRivers of Washington (state)Tributaries of the Yakima RiverWashington (state) river stubs
Kachess River on Mineral Creek Trail
Kachess River on Mineral Creek Trail

Kachess River is a tributary of the Yakima River, in the U.S. state of Washington. From its source on Chickamin Ridge in the Alpine Lakes Wilderness region of the Cascade Range, the Kachess River flows south into Kachess Lake, a natural lake regulated as a reservoir by Kachess Dam. Below the dam, the Kachess River flows south and then empties into the Yakima River at Lake Easton.

Excerpt from the Wikipedia article Kachess River (License: CC BY-SA 3.0, Authors, Images).

Kachess River
Old US Highway 10,

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Wikipedia: Kachess RiverContinue reading on Wikipedia

Geographical coordinates (GPS)

Latitude Longitude
N 47.251666666667 ° E -121.19888888889 °
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Old US Highway 10
98925
Washington, United States
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Kachess River on Mineral Creek Trail
Kachess River on Mineral Creek Trail
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Kachess Lake
Kachess Lake

Kachess Lake () is a lake and reservoir along the course of the Kachess River in Kittitas County, Washington, United States. The upper part of the lake, north of a narrows, is called Little Kachess Lake. The Kachess River flows into the lake from the north, and out from the south. Kachess Lake is the middle of the three large lakes which straddle Interstate 90 north of the Yakima River in the Cascade Range. The other two are Cle Elum Lake, the easternmost which is also north of I-90 and Keechelus Lake, the westernmost, which is south of I-90. Kachess Lake is part of the Columbia River basin, the Kachess River being a tributary of the Yakima River, which is a tributary to the Columbia River. The lake is used as a storage reservoir for the Yakima Project, an irrigation project run by the United States Bureau of Reclamation. Although a natural lake, Kachess Lake's capacity and discharge is controlled by Kachess Dam, a 115-foot (35 m) high earthfill structure built in 1912. The discharge channel for Kachess Reservoir is 2,877 feet long and was constructed from the natural lake to the intake structure of the dam's outlet works, approximately 1800 feet downstream and at a lower elevation than the original lake outlet. The intent of the lowered outlet works was to put all of the average annual runoff into service by adding an additional 76,000 acre feet of natural lake water. As a storage reservoir, Kachess Lake's active capacity is 239,000 acre⋅ft (295 million m3). The name Kachess comes from a Native American term meaning "more fish", in contrast to Keechelus Lake, whose name means "few fish".