The Snake River is a  tributary of which river on which Richland stands?
Richland, Washington Richland is a city in Benton County in the southeastern part of the State of Washington, at the confluence of the Yakima and the Columbia Rivers. As of the 2010 census, the city's population was 48,058. April 1, 2013, estimates from the Washington State Office of Financial Management put the city's population at 51,150. Along with the nearby cities of Pasco and Kennewick, Richland is one of the Tri-Cities, Washington, and is home to the Hanford nuclear site.
Middle Fork Clearwater River The Middle Fork Clearwater River is a short, but high volume river in northern Idaho and is the major source of the Clearwater River, a tributary of the Snake River. The Middle Fork flows west for 23 mi from the confluence of the Selway River and Lochsa River at Lowell, to the town of Kooskia where it joins with the South Fork Clearwater River to create the Clearwater River. The Middle Fork's entire length is within Idaho County, although a small portion of its watershed extends into Clearwater County.