520 weekend closure comes with wicked I-405 twist + Falcon maintenance

20130712-065401.jpgImages: WSDOT Flickr stream

The 520 Bridge will close this weekend for its annual inspection and maintenance, from 11pm Friday to 5am Monday, as has become routine during 520 replacement construction over the past few years. But this won’t be a typical weekend shutdown. Crews will also close the northbound lanes of I-405 through Bellevue, complicating things for drivers detouring around Lake Washington.

Ouch. You’ve been warned.

“There’s a lot of work to be done,” said WSDOT Northwest Regional Administrator Lorena Eng. “But combining it in one weekend helps reduce the number of closures we need this summer. We also want to avoid conflicts with special events like Seafair, the Bite of Seattle and the Bellevue Arts Festival.”

On northbound I-405, crews will replace all the concrete panels in the two left lanes between Southeast Eighth and Main streets. These panels – which stretch the length of a dozen football fields – are failing. Crews will also tear out and replace panels in many other locations. Panels in the two right lanes will be repaired later this summer.

On SR 520, bridge maintenance crews will inspect the floating bridge. This annual inspection includes checks of the electrical system and drawspan machinery. Crews will also tackle repair and maintenance tasks such as concrete and expansion joint repair. Eastside Transit and HOV project construction crews will take advantage of the closure to install an 11-foot-diameter, fish-friendly culvert beneath all lanes of SR 520 just west of I-405 and requires a multi-day closure to complete.

In other bridge news, state biologists recently climbed onto the I-5 Ship Canal Bridge to visit the peregrine falcon nest and tag this year’s babies. The falcons keep away pigeons and their paint eating poop which saves maintenance costs, so there.

20130712-072203.jpgIncoming!

More freeway falcon photos here.

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