 State Route 170 | ||||
|---|---|---|---|---|
 SR 170 is highlighted in red. | ||||
| Route information | ||||
| Auxiliary route of SR 17 | ||||
| Maintained by WSDOT | ||||
| Length | 3.68 mi[1] (5.92 km) | |||
| Existed | 1970[2]–present | |||
| Major junctions | ||||
| West end |  SR 17 near Warden | |||
| East end | South Main Avenue in Warden | |||
| Location | ||||
| Country | United States | |||
| State | Washington | |||
| Counties | Grant | |||
| Highway system | ||||
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State Route 170 (SR 170) is a short, 3.68-mile (5.92 km) long state highway located within Grant County in the U.S. state of Washington. The highway begins at SR 17 west of Warden and travels east to end at Main Avenue in Warden. The current route of the highway was first established in 1967 as Secondary State Highway 11I (SSH 11I) and became SR 170 in 1970 after it was moved north of its previous route, which had been on maps since 1926, named SSH 11A in 1937 and renumbered to SR 170 in 1964. The old route ran from the Columbia River southwest of Basin City to SR 17 north of Mesa.
- ^ Washington State Department of Transportation (2006). "State Highway Log: Planning Report, SR 2 to SR 971" (PDF). Retrieved July 4, 2009.
- ^ Washington State Legislature (1970). "RCW 47.17.345: State route No. 170". Retrieved July 4, 2009.