Yakima River

Yakima River is a major tributary of the Columbia River in south-central Washington. It flows for approximately 214 miles from its headwaters in the Cascade Range to its confluence with the Columbia River near Richland. The river's basin is a vital resource for agriculture, supporting a significant portion of the state's irrigation and fruit production, and it is also renowned for its recreational opportunities, particularly fly fishing.

Course and geography

The river originates at the outlet of Keechelus Lake on the eastern slopes of the Cascade Range, near Snoqualmie Pass. It flows southeast through the Kittitas Valley, passing the city of Ellensburg and through the Yakima River Canyon. The river then turns south, entering the Yakima Valley and flowing through the city of Yakima and the Tri-Cities area. Its final segment forms part of the border between Benton County and Franklin County before emptying into the Columbia River at Richland. Major tributaries include the Naches River, Teanaway River, and Selah Creek.

Hydrology and water management

The hydrology of the river is characterized by a high spring snowmelt runoff from the Cascades, followed by lower summer flows. This natural pattern has been extensively altered by water management infrastructure, primarily for irrigation. Key features include the Yakima Project, a Bureau of Reclamation undertaking involving several major storage reservoirs such as Keechelus Lake, Kachess Lake, and Cle Elum Lake, along with diversion dams like Roza Dam. The Yakima River Basin Water Enhancement Project works to improve water conservation and fish habitat. Water rights are governed by the historic Winters Doctrine and administered through agreements like the Yakima River Basin Water Rights Adjudication.

Ecology and environmental issues

The basin supports diverse ecosystems, from alpine headwaters to shrub-steppe in the lower reaches. It is home to several salmonid species, including Chinook salmon, coho salmon, and steelhead, which are listed under the Endangered Species Act. Significant environmental challenges include water temperature exceedances, habitat degradation from agricultural runoff, and barriers to fish passage. Restoration efforts are coordinated by entities like the Yakama Nation and the Washington Department of Fish and Wildlife, focusing on projects such as the Cle Elum Dam fish passage and the Yakima Basin Integrated Plan.

History and human use

The river valley has been home to the Yakama people for millennia, with the Treaty of 1855 establishing the Yakama Indian Reservation. The arrival of Euro-American settlers, spurred by the Northern Pacific Railway, led to the development of large-scale irrigation agriculture, notably after the passage of the Reclamation Act of 1902. The Yakima Project transformed the valley into a leading producer of hops, apples, and grapes. Historical conflicts over water rights, including the landmark case United States v. Winters, have shaped modern water law. The Hanford Site, part of the Manhattan Project, was established on the river's lower reach.

Recreation and points of interest

The river is a premier destination for recreation, especially fly fishing for rainbow trout and whitefish. The scenic Yakima River Canyon offers opportunities for rafting, camping, and birdwatching. Popular access points include the Umtanum Recreation Site and Roza Recreation Site. The river's greenway trails near Yakima and the Tri-Cities provide paths for cycling and hiking. Cultural points of interest include the Yakima Valley Museum and the Central Washington Agricultural Museum, while wine tourism is prominent in the Yakima Valley AVA.

Category:Rivers of Washington (state) Category:Tributaries of the Columbia River Category:Yakima County, Washington