Washington State Route 17

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State Route 17

RCW 47.17.070

Length:

136.7 mi (220 km)

South end:

US 395 in Mesa

Major
junctions:

SR 26 in Othello

I-90 in Moses Lake

SR 282 in Ephrata

SR 28 in Soap Lake

US 2 near Coulee City

North end:

US 97 in Brewster

Washington State Routes
< SR 16		SR 18 >

Map of State Route 17

State Route 17 is a highway in the state of Washington, U.S.A. It extends about 137 miles from U.S. Highway 395 in the tiny town of Mesa, in the south central part of the state, to U.S. Highway 97 at the confluence of the Okanogan and Columbia Rivers near Brewster.

North of Interstate 90, SR-17 travels through the Grand Coulee for about 20 miles, along the shores of Soap Lake, Lenore Lake, Blue Lake, and Park Lake, all remnants of a major river that flowed through this part of the state about 2 million years ago. SR-17 meets U.S. Highway 2 at the southern shore of Banks Lake, then leaves the coulee and extends due north through farmland for about 20 more miles before turning left and following a dry river bed into Bridgeport, where it crosses the Columbia just west of Chief Joseph Dam. The highway follows the east bank of the Columbia for a few more miles inside the Colville Indian Reservation before terminating at US-97 east of Brewster.

Mileposts on SR-17 begin with milepost 8, posted about half a mile north of the highway's origin at US-395. Prior to 1979, SR-17 began at Eltopia, about 7½ miles south of Mesa. That year, US-395 was rerouted from what is now Blanton Road in Franklin County to its current routing, which eliminated the portion of SR-17 that formerly ran between Eltopia and Mesa. SR-17 now originates in Mesa, but new mileposts have not been posted on the route reflecting the highway's new starting point.