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Aerial view of interchange at Johnson County Gateway

Johnson County Gateway Phase 2 Design/Build

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Johnson County, Kansas

GBA was a major participant in KDOT’s first-ever major design-build project. The Gateway project included 26 structure projects to help improve this important corridor of I-435, I-35, US-69, K-10 and more.

GBA was responsible for 15 structures, with design activities spanning a little over a year. Within about three months of notice-to-proceed, GBA’s design teams were responsible for two early steel packages, an early bridge widening package, two widened and rehab bridge packages, two new bridge design packages and preliminary design for two new bridges.

GBA quickly provided these plans and followed the required quality process for this project. Along the way, GBA eliminated bridge girders and found hundreds of thousands of dollars in savings on the bridges and retaining walls.


Kansas Department of Transportation Bureau of Structures & Geotechnical Services

Completion Date



ACI National Infrastructure Award, 2017
ACI Kansas Chapter Infrastructure Award, 2017
ACI Excellence in Concrete Construction Award, 2017
Eastern Chapter KSPE Outstanding Engineering Achievement Award, 2017