Engineering News-Record » As Washington State Dept. of Transportation officials look toward a fall 2018 opening of the 1.7-mile-long bored tunnel under downtown Seattle that will replace the aging 1953-opened Alaskan Way Viaduct—also part of State Route 99—the final contract in the $3.3-billion project to tear down the viaduct was awarded to Kiewit Infrastructure West.
Herald Net » A report due out in June will reveal what city, county and state folks think is the best way to unclog traffic where Highway 204, 20th Street SE and U.S. 2 converge on the east end of the westbound trestle. Those compiling the Interchange Justification Report started with eight concepts, looked at three of those more closely and have zeroed in on a preliminary preferred alternative.
K5 News » The state of Washington is now more than two decades into a program to retrofit the state’s vulnerable bridges. There are 591 that need retrofitting. Of those, more than 100 have received a partial retrofit. Two of the states’ most vulnerable bridge structures, the Alaska Way Viaduct and the 520 floating bridge are in the process of being replaced.
WTOP » Local experts are moving ahead with plans for the region to comply with federal rules aimed at helping the nation get a grip on everything from potholes and bridge repairs to greenhouse gas emissions. The MAP-21 and Fast Act rules require states, regional entities and providers of public transportation to collect and track data related to highway and transit issues, such as safety, infrastructure condition, system reliability and environmental sustainability.
Engineering News-Record » The West Seattle Link Extension, proposed for 2030, includes a new fixed bridge, while the 2035 Ballard Link Extension requires both a new downtown Seattle light rail tunnel and a movable bridge. Both extensions move light rail west of Seattle, with the West Seattle portion heading across the Duwamish River with a 4.7-mile track extension. The Ballard extension runs mostly northwest 7.1 miles and requires a 3.3-mile downtown tunnel.