complement the U.S. route system on May 18, 1937, and The Dalles-California Highway from Shaniko Junction to The Dalles was numbered as OR 50. OR 50 was renumbered to OR 23 on May 26, 1950, and became the Oregon section of US 197 when it was established in 1952. US 197 traveled north onto the newly constructed The Dalles Bridge over the Columbia River to US 830 and PSH 8 northeast of Dallesport and traveled east with the two highways to end at US 97 in Maryhill. US 830 and its concurrency with US 197 were removed from the U.S. route system in 1968, leaving US 197 concurrent with the successor to PSH 8, SR 14, after the 1964 state highway renumbering. The concurrency with SR 14 was removed from the Washington state highway system in 1979, but remained as a part of US 197 as defined by the American Association of State Highway and Transportation Officials (AASHTO) until September 22, 2006. Major intersections Notes References External links US 197 at US Highway Ends The Dalles-California Highway #4 at Oregon Highways US 197 at Highways of Washington State 97-1 1 97-1 97-1 Transportation in Wasco County, Oregon Transportation in Klickitat County, Washington