Washington State Route 515

State Route 515 marker
State Route 515
Map
A map of Kent and Renton with SR 515 highlighted in red
Route information
Auxiliary route of I-5
Maintained by WSDOT
Length7.86 mi[1] (12.65 km)
Existed1964–present
Major junctions
South end SR 516 in Kent
Major intersections I-405 in Renton
North end SR 900 in Renton
Location
CountryUnited States
StateWashington
CountyKing
Highway system
SR 513 SR 516

State Route 515 (SR 515) is a state highway in the U.S. state of Washington serving suburban King County. The highway travels 8 miles (12.9 km) north from SR 516 in eastern Kent to Renton, where it intersects Interstate 405 (I-405) and SR 900.

The highway was originally built by the county government in the 1910s as a winding gravel road connecting local coal mines. It was straightened and paved in the 1920s and was designated as Secondary State Highway 5C (SSH 5C) in 1937. SSH 5C was replaced by SR 515 in the 1964 state highway renumbering and extended north into downtown Renton after the construction of I-405. A section of the highway on Talbot Highway was moved to a new bypass road in 1982 and other sections in Kent were widened to four lanes in 1991. The I-405 underpass was rebuilt as a half diamond interchange in 2010.

  1. ^ Multimodal Planning Division (January 3, 2018). State Highway Log Planning Report 2017, SR 2 to SR 971 (PDF) (Report). Washington State Department of Transportation. pp. 1507–1512. Retrieved August 31, 2018.