Eastbound SR 516 in SeaTac will be clocking out for a long weekend, with eastbound lanes of the highway set to be fully closed between SR 99 and Military Road South from 10 p.m. Friday, June 13, until 4 a.m. Monday, June 16.

The Washington Department of Transportation (WSDOT) says that northbound I-5 exit to SR 516 will also close Saturday, June 14 through the morning of Sunday, June 15.

The closure will allow crews to pave and stripe SR 516 to accommodate an expanded interchange opening later this summer.

Eastbound drivers on SR 516 will be detoured onto southbound I-5 to South 272nd Street, then routed back onto northbound I-5 and exit at South 200th Street/Military Road South and follow a signed detour back to SR 516.

Northbound I-5 drivers wishing to exit SR 516 will also follow a signed detour.

The reconfigured SR 516/I-5 interchange will include new signals, multimodal improvements, and a new Veterans Drive South underpass to help all people travel through the interchange safely and efficiently.

This work is part of the SR 509 Completion Project.

SR 516 closure information

Friday, June 13 through the morning of Monday, June 16:

  • 10:30 p.m. to 4 a.m. – All lanes of eastbound SR 516 will close between SR 99 and Military Road South. A signed detour will be in place.

I-5 ramp closure information

Saturday, June 14 through the morning of Sunday, June 15:

  • 11 p.m. to 3:30 a.m. – The northbound I-5 exit to SR 516 will close overnight. A signed detour will be in place.

SR 509 Completion Project information

The SR 509 Completion Project builds 3 miles of new tolled highway between I-5 and South 188th Street near the south end of Seattle-Tacoma International Airport.

The new highway will be completed in stages.

  • The portion between I-5 and 24th Avenue South is scheduled to open in summer 2025 along with the new Veterans Drive tunnel at the SR 516 interchange.
  • The final stage builds the remaining 2 miles of the expressway between 24th Avenue South and South 188th Street.
  • The entire project is planned for completion by 2029.

Puget Sound Gateway Program overview

The SR 509 Completion Project is part of WSDOT’s Puget Sound Gateway Program, which also includes the SR 167 Completion Project in Pierce County. Together, the two completion projects finish critical missing links in Washington’s highway and freight network.