Kennewick and Pasco lie in a depression, created during the geologic period when the Cascades and the Okanogan Highlands were elevated and the entire plateau of eastern Washington altered. The Ed Hendler Bridge, a cable span built in 1978, replaces the former 1914-era Pasco-Kennewick Bridge and the arch-truss Blue Bridge (officially Pioneer Memorial Bridge), so named for its blue paint. It spans the river between Pasco and Kennewick on routes 397 and 395, respectively.