WWW.ACPA.ORG 15 Winter // 2022–23 MUNICIPAL STREETS & INTERSECTIONS (>30K SY) US 54 and Business 54 Interchange Miller County, Missouri CONTRACTOR: Emery Sapp & Sons* OWNER: Missouri Department of Transportation ENGINEER: Missouri Department of Transportation SILVER North Teutonia Avenue, West Groeling Avenue to West Capitol Drive Milwaukee County, Wisconsin CONTRACTOR: Zignego Company* OWNER: Wisconsin Department of Transportation, City of Milwaukee ENGINEER: WSP USA The U.S. Highway 54 and Business 54 Interchange was a long-awaited project not only for the residents of the Lake of the Ozarks but also for the nearly 9 million tourists that visit the lake area each year. The project not only eliminated the existing traffic signal at one of the most dangerous intersections in Central Missouri but also improved access and traffic flow to the numerous businesses along this corridor and provided new infrastructure for future growth and development. The existing signalized interchange had been in place for many years and needed a major overhaul to handle the increased traffic volume and eliminate the numerous crashes that occurred there every year. Crews transformed the existing interchange into a partial diamond interchange consisting of two new bridges, three roundabouts, and three reconstructed sideroads four months ahead of the two-year project schedule. All this work took place while managing nearly double the anticipated traffic volume, which surged from roughly 5 million visitors a year to over 9 million due to the COVID-19 pandemic. To deliver this complex project ahead of schedule, Emery Sapp & Sons developed an internal traffic control plan that combined multiple phases of the project to reduce the number of construction phases from 13 to 9. Multiple Value Engineering proposals utilizing the existing pavement for temporary bypass construction were recognized on the project, which not only resulted in cost savings for the owner but also helped to further accelerate the project schedule. All of this work was completed while maintaining full traffic flow through the interchange for the entirety of the project. The improvement for the Wisconsin Department of Transportation project consisted of reconstructing 1.26 miles of a two-lane road—North Teutonia Avenue—to current City of Milwaukee and Wisconsin Department of Transportation standards. The roadway width was designed to match the existing widths. The project included one 12-foot driving lane and one on-street parking lane in each direction, with curb and gutter on the outside of the roadway. A 5-foot bike lane between the driving and parking lane was also constructed in each direction. In addition, sidewalks were replaced per American Disabilities Act (ADA) standards on both sides. North Teutonia Avenue work consisted of removals, grading, base aggregate dense, concrete pavement, concrete curb and gutter, concrete sidewalk, storm sewer, city underground conduit, pavement markings, traffic signals, and street lighting. By collaborating with residents and businesses on Teutonia Avenue, Zignego Company was able to produce creative solutions to provide access to properties while allowing the paving operation to slip-form pave the concrete pavement without having to gap for driveways openings. The reduction of driveway gaps resulted in increased ride quality on the project. This project was in an old section of Milwaukee which presented its own set of challenges, including the discovery of an abandoned asbestos-based conduit pipe, a combination of live and abandoned utilities in the subgrade, and meeting Americans with Disabilities Act requirements. Teutonia Avenue has a full sidewalk, which allows no room for error when placing the sidewalk as well as curb ramps. Extensive planning and field modifications had to be done to ensure that the project was ADA-compliant when completed. There were also many staircases, private sidewalks, and business entryways that needed extra consideration while forming and pouring to ensure ADA compliance. GOLD
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