January 2017

ACEC Washington presented Otak with three Engineering Excellence awards on January 20.

In the category of Unique or Innovative Applications, Otak was given a Gold Award for our Willapa Hills Trail Bridge Replacement project in Willapa Hills State Park. 

Along the trail within Willapa Hills State Park are numerous stream and river crossings. In 2007, a devastating flood destroyed two trestles, sending the center steel truss spans downriver. 

The alternatives analysis started after the survey, geotechnical investigation, hydraulic analysis, and environmental reconnaissance were completed. Ten bridge options were studied for each site, and after review, it was determined that a clear span bridge was the preferred option. The solution was a bridge with side steel trusses with post-tensioning tendons inside a grouted duct, which was installed inside a HSS bottom chord.

Both bridges were a success!

Otak was also awarded two Bronze Awards. 

Dungeness River Railroad Trestle Replacement project in Sequim—This is a 750-foot long pedestrian bridge—designed, permitted, and constructed all within eight months. The river and resulting habitat enhancement are a success for the native salmon. The Tribe, the local community, and trail users were extremely pleased.

Bucklin Hill Bridge & Estuary Enhancement project for Kitsap County—This project included replacing roadway embankment and two 72-inch culverts with a 240-foot three-span bridge, widening the road to five lanes, traffic signals, roadway and pedestrian lighting, storm drainage improvements, and amenities for pedestrians and bicyclists. 

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