
BRIDGES AND HIGHWAYS
Construction of concrete and steel bridges, tunnels, deep foundations, and retaining walls is often technically challenging. This type of work is one of KBA’s specialties. Through attention to detail and persistent follow-through, KBA helps achieve the desired durability and quality of the structures while minimizing the impacts generated during the intensity of construction.

West Seattle Corridor Bridges Rehabilitation
Client: City of Seattle
Location: Seattle, Washington
2022 - 2023
KBA provided construction management and inspection services for this emergency bridge repair program that repaired the West Seattle High Bridge and renovated the Spokane Swing Bridge. Coordination was the most important element on this fast-moving project because of the community impacts and the number of hours the contractor was working. Work included injecting epoxy into the cracks to seal them and prevent corrosion and wrapping parts of the structure with carbon fiber-reinforced polymer for durability to strengthen the bridge. The project installed more tight steel cables called post-tensioning strands through the entire bridge. These strands reinforced the concrete, much like the bridge’s skeleton. The program worked on a tight schedule to bring full mobility back to West Seattle residents.

West Sammamish River Bridge Replacement
Client: City of Kenmore
Location: Kenmore, Washington
2020 - 2023
KBA provided construction management and inspection services for this $28 million project that replaced the southbound bridge across the Sammamish River and constructed new sidewalk and bike facilities on the west side of the road between NE 170th St and NE 175th St. The project also included new signals at NE 170th St and NE 175th St, new streetlighting, utility undergrounding, and new landscaping. The bridge provided the only route over the Sammamish River in Kenmore. With an average daily traffic volume of 13,000 southbound vehicles, it is also the only north-south route into the City and provides access to SR 522, Kenmore City Hall, and the downtown business center.

Thornton Street Overpass
Client: City of Ferndale
Location: Ferndale, Washington
2019 - 2023
KBA provided construction management and inspection services for this $21 million project, which constructed a new three-span concrete girder bridge spanning an existing railroad, with decorative faux rock structural earth wall approaches. There was an initial five-stage preloading phase, and utility relocation work occurred prior to the bridge construction.

Peter Western Bridge Replacement
Client: City of Burien
Location: Burien, Washington
2019 - 2021
KBA provided full construction management services for this $4.6 million project that constructed improvements of S 116th Street over an unnamed creek, including installation of a new bridge, storm drainage improvements at the roadway and at the creek levels, reconstruction of approximately 130 feet of the creek, installation of a SEW wall adjacent to the reconstructed creek, HMA paving, striping and signing, and planting.

228th Street Grade Separation
Client: City of Kent
Location: Kent, Washington
2018 - 2021
KBA provided construction management and inspection services for this $21 million project for the City of Kent. KBA worked with the Owner and contractor to install a CIPP liner in an existing sewer pipe instead of open cutting when existing utilities were discovered that complicated the contractor’s ability to safely shore a trench. KBA also proposed and helped coordinate the use of used geofoam blocks the contractor owned, saving the project cost and keeping usable material from going to a landfill. This project was funded with FHWA, State, and Local dollars.

Grand Avenue Park Bridge
Client: City of Everett
Location: Everett, Washington
2017 - 2020
KBA provided the Resident Engineer and Office Engineer on an integrated team to construct a single-span (257 feet long and 24 feet deep) steel truss bridge. The $14 million combined utility and pedestrian bridge begins on Port of Everett property atop a 30-foot-high concrete tower with an elevator shaft serving as the west abutment. The bridge spans eastward 40 to 60 feet above SR 529, five BNSF tracks, and a steep 80-foot-high bluff before ending on the east abutment located along the northwest edge of Grand Avenue Park near 16th Street. It carries a 36-inch storm drainpipe and 30-inch combined sewer pipe with existing terminuses at the west end of 16th Street to existing outfalls in Puget Sound. An elevator was constructed to provide ADA compliant access for pedestrians between Grand Avenue Park and the Port of Everett.