Design-Build Roadway and Gate Access
Design and construction of a new gate access and roadway system for Fort Leonard Wood required engineering challenges through the rough wooded terrain of the Ozark Mountains. This design-build project was delivered eight months ahead of schedule despite major challenges. The project provides an alternative route into this central Missouri post to avoid a congested access road and represents a unique partnership between the Army and the Missouri Department of Transportation, demonstrating the value of the design-build process.
Structural elements included a 483-foot-long bridge crossing of the only indigenous trout stream in Missouri, a 600-foot-long triple-cell box culvert and a landfill that encroached into the roadway alignment. We minimized impacts to the trout stream while working around the roosting season of the endangered migrating Indiana bat. Brush and trees were burned on site with air curtains to meet air permit requirements and deep dynamic compaction stabilized the landfill. Activities were coordinated to avoid interference with military training operations. The new alignment required grade transitions and excavation of 2.8 million cubic yards of earth and rock. Our design team worked with the construction contractor to create a balanced profile that reduced the schedule by 45 days.