Washington State Route 231
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A map of the Spokane area featuring the route of SR 231 highlighted in red.
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| Route information | ||||
| Auxiliary route of SR 23 | ||||
| Defined by RCW 47.17.445 | ||||
| Maintained by WSDOT | ||||
| Length: | 74.97 mi (120.65 km) | |||
| Existed: | 1964 – present | |||
| Major junctions | ||||
| South end: |
 SR 23 near Sprauge
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 US 2 in Reardan SR 292 in Springdale
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| North end: |
 US 395 near Chewelah
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| Highway system | ||||
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State Route 231 (SR 231) is a 74.97-mile (120.65 km) long state highway in the U.S. state of Washington serving communities in Lincoln and Stevens counties. The highway, located entirely west of Spokane in the Inland Empire, serves Sprague, Edwall, Reardan, Springdale and Chewelah. The route extends from SR 23 north of Sprague to a concurrency with U.S. Route 2 (US 2) near Reardan and an intersection with US 395 south of Chewelah.
Although SR 231 was established in 1964, the US 2 concurrency has existed as State Road 7 since 1909. Later, Secondary State Highway 2G (SSH 2G) and Secondary State Highway 3J (SSH 3J) were established in 1937 and formed SR 231 in 1964. The highway crosses the Spokane River on the Spokane River Bridge at Long Lake Dam, which was constructed in 1949 and added to the National Register of Historic Places in 1995 before repair work in late 2008.
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