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Posts Tagged ‘WA’

2017 ACEC Grand Conceptor Award Winner: SR 520 Floating Bridge in Seattle, Washington

Monday, May 8th, 2017
2017 ACEC Grand Conceptor Award Winner: SR 520 Floating Bridge Seattle, Washington

The ACEC 2017 Engineering Excellence Awards “Grand Conceptor” Winner: SR 520 Floating Bridge Seattle, Washington Designed by HDR.

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Seattle, WA: Bertha Breaks Through

Friday, April 7th, 2017
Seattle, WA: Bertha Breaks Through

The SR 99 tunneling machine, Bertha, breaks through to daylight on April 4, 2017 near Seattle’s iconic Space Needle after tunneling 1.7 miles underneath downtown Seattle. See what one of the world’s largest tunneling machines looks like up close as only a drone can show.

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Woodland, WA: Drone Footage of Mudslide on SR 503

Friday, March 31st, 2017
Woodland, WA: Drone Footage of Mudslide on SR 503

Clearing the debris slide blocking SR 503, 20 miles east of Woodland isn’t as easy as just removing trees and rocks from the highway. A large crack shows where the rock face of the slope has separated from the hillside, making it unsafe below. Record rainfall along with freezing temperatures aided in the debris fall. As of Friday, March 17, the slope is still moving and unstable. We shot this video using a drone, so we can start developing a permanent repair plan.

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Bellevue, WA: Drone’s Eye View of Light Rail Tunnel Portal

Thursday, March 2nd, 2017
Bellevue, WA: Drone’s Eye View of Light Rail Tunnel Portal

Drone’s-eye view of the East Link light rail tunnel portal where work has begun on the new tunnel to run under downtown Bellevue. Trains roll in 2023.

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WSDOT: Building a Highway Underneath Seattle

Tuesday, December 20th, 2016
WSDOT: Building a Highway Underneath Seattle

With a time-lapse camera mounted 54-feet high, you almost get a bird’s-eye view of work inside Seattle’s SR 99 tunnel. As the tunneling machine Bertha builds the tunnel, road crews are right behind – building the foundations, walls and the top deck of the double-deck highway drivers will travel on when the tunnel opens. Take a look.

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Washington State DOT: Building the Floating Bridge over Lake Washington

Tuesday, December 6th, 2016
Washington State DOT: Building the Floating Bridge over Lake Washington

An overview of the reasons why the new SR 520 floating bridge was built on Lake Washington, and some of the solutions the project team developed to efficiently build the world’s longest floating bridge. The project won a 2016 Excellence in Design (Engineering) Award from the Design-Build Institute of America.

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Washington State DOT: How ATDM Works

Thursday, August 4th, 2016
Washington State DOT: How ATDM Works

The ATDM overhead active traffic and demand management signs will display speed limits, lane status or variable messages so driver know what’s happening ahead.

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Seattle, WA: Workers Inside the SR 99 Tunneling Machine

Tuesday, July 5th, 2016
Seattle, WA: Workers Inside the SR 99 Tunneling Machine

This video was provided by Ballard Marine Construction, the firm in charge of managing and performing hyperbaric work on the SR 99 Tunnel Project in Seattle. It shows crews at work behind the SR 99 tunneling machine’s cutterhead during a planned maintenance stop in spring 2016. To stabilize soil and water that would otherwise flow through openings in the cutterhead, crews must pump compressed air into their work space at the front end of the machine.

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Puyallup, WA: The Historic Meridian Street Bridge

Monday, June 20th, 2016
Puyallup, WA: The Historic Meridian Street Bridge

For more than eight decades the Meridian Street Bridge over the Puyallup River has served as a portal for cities along the Puget Sound to community of Puyallup, Washington. Significant for its design, it is the only one of its kind in Washington, and may very well be unique in the United States, if not the world.

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Seattle, WA: Tunneling Under the Alaskan Way Viaduct

Tuesday, May 10th, 2016
Seattle, WA: Tunneling Under the Alaskan Way Viaduct

After nearly a week of tunneling under the Alaskan Way Viaduct, crews are steadily continuing Bertha’s underground drive towards downtown Seattle. This video gives you a behind-the-scenes glimpse into how the new tunnel is being built, showcasing the complex operations involved in this project. Massive concrete ring segments are transported to Bertha’s segment erector where they are lifted into place, allowing the machine to push forward while the excavated soil is transported along a network of conveyer belts and into a barge moored at Elliott Bay’s Pier 46.

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