TxDOT (Beaumont District)
Civil Engineering // Land Surveying // Environmental // Public Involvement

US 69 & SH 73 Turbine (Spiral) Interchange

PCI designed this featured, multi-level turbine interchange in 2020 – the second of its kind in Texas – through coordinated services in civil engineering, public involvement, and surveying. The turbine interchange was designed to replace the existing cloverleaf interchange, reducing construction cost from $125M to $70M. Despite project challenges like soil conditions, numerous gas line crossings, historical flooding, wetlands, and complex geometry, PCI completed schematic and final design within two years to meet TxDOT’s funding schedule.

Learn more and experience some of the video highlights: Turbine Interchange Analysis on US-69/SH-73 in Port Arthur, TX (