• Project

SR 520 Portage Bay and Roanoke Lid Project

Project overview

The Portage Bay Bridge and Roanoke Lid Project will replace the aging Portage Bay Bridge with a seismically resilient structure that includes improved bus/carpool travel and an extension of the SR 520 Trail. This project also builds a landscaped lid between Seattle’s Roanoke Park and North Capitol Hill neighborhoods.

Estimated 2024-2031
Project status
1.375 billion

What to expect

This project will rebuild a critical stretch of SR 520 and involve several major closures of the highway.

This project will complete SR 520’s reconstruction between Bellevue and Seattle.