Blog
January 2017
   January 21, 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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   January 20, 2017

 

Otak was well represented at the annual ACEC Engineering Excellence Awards banquet on Wednesday evening (January 18th) at the Multnomah Athletic Club in downtown Portland. In attendance were members of Otak’s staff, the City of Lake Oswego, and Clark Regional Wastewater District, all of whom were there to support two projects that had been submitted for awards.

 

The Rockinghorse Lane Drainage Improvements and Landslide Stabilization project was submitted by Otak’s Portland office as the prime consultant selected to work with the City of Lake Oswego to repair a highly degraded drainage outfall and adjacent landslide. ACEC honored us with the Small Project Award for our efforts. The project required a careful balance of environmental permitting, thoughtful civil and water resource engineering design, and geotechnical consultation. Ultimately, the project installed approximately 300 feet of fused HDPE pipe to convey stormwater through the steepest topography, created 250 feet of open channel, repaired the State Park’s trail crossing, and constructed a large shear key to buttress the slide that included 1,500 tons of stone embankment.

 

The Tenny Creek Slide Emergency Repair project was submitted by Otak’s Vancouver office, and included stabilizing and repairing the broken sewer line, moving the creek laterally and reconstructing the slide area, providing a streambed design that met fish passage requirements, and restoring the area with upland plantings as it is in a habitat buffer area.  We were given an Honor Award for our this project.

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