Ash Creek Bridge Independence, Oregon

The Ash Creek Bridge on F Street in Independence, Oregon had become structurally and functionally inadequate. A modern structure that supports the transportation infrastructure of the community and enhances the surrounding public spaces, including a unique historic bridge railing system, would be its replacement.

Modern Bridge Replacement, Improved Transportation Infrastructure

As a timber-supported concrete structure on a local collector, the Ash Creek Bridge was only sufficient to pass light, local traffic. The replacement would turn that existing three-span concrete bridge into a single-span prestressed concrete bridge, allowing another route for local traffic as well as community use. The design introduced new raised sidewalks for bicycle and pedestrian traffic while also including a new urban bridge rail that increases protection for pedestrians without causing a blunt end issue for vehicles. Stormwater treatment allows for sustainable runoff into Ash Creek and sheet pile scour protection prevents water from undermining the bridge foundation while remaining fish friendly. With the addition of low-level pedestrian lighting and ornamental handrails, the bridge was configured to enhance the adjacent Inspiration Garden public park. A collaborative structure brought this project to completion. The team lead regular monthly discussions with the client throughout the process, reporting on progress issues and decision points. This process involved various stakeholders throughout delivery, which included survey, geotechnical, roadway design, bridge design, environmental permitting, and hydraulics analysis.

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Structural Engineering
“Bridge and structural projects play an integral role in communities and I am grateful to pursue a career that allows me to do what I enjoy while benefiting others. ”

Scott Nettleton

Manager of Bridges & Structures, Oregon & SW Washington

“Otak has always provided me with the opportunity to chart my own course and surround myself with amazing, talented, and interesting people.”

Kevin Timmins

Director of Water & Natural Resources

Stormwater Planning
“I like working at Otak because my projects bring me in contact with stormwater managers throughout the Pacific Northwest.”

Trista Kobluskie

Senior Planner