Mississippi River Crossing Forcemain Improvements

This complex project included three tunnels and a cut-and-cover river crossing for a 3-mile-long sanitary sewer in an urban area. TKDA* provided the geotechnical engineering and design for the tunnels and river crossing, including grout design, plans and specifications, and construction observation.

*Professional services for this project were provided by CNA Consulting Engineers, which was acquired by TKDA in 2025. CNA employees continue to work at TKDA, contributing their civil, structural, and geotechnical engineering experience. Learn more about the acquisition here.