United Contractors is a trusted heavy highway construction contractor based in Johnston, Iowa, specializing in bridge construction and concrete structures throughout the Midwest and South regions. This experienced firm offers comprehensive construction services including box culverts, retaining walls, soil stabilization, barrier rail installation, and water reservoir renovation for municipal and commercial projects. United Contractors also provides equipment rental, sheet pile driving, railroad work, and concrete recycling services to support infrastructure development across multiple states. With expertise in design-build projects, emergency repairs, and demolition, this Johnston contractor delivers reliable solutions for complex heavy highway construction needs.