The McKinley Street Grade Separation Project connects the SR-91 interchange on the north side to Magnolia Avenue on the south side. The project aims to provide a grade separation solution that will alleviate traffic congestion, enhance mobility, and improve air quality and noise levels in the area. Built with approximately 2.4 million pounds of steel and bridge components, the 294‑foot tied‑arch structure was assembled offline and moved into place with self-propelled modular transporters. The bridge spans 294 feet with a width of 91 feet and is a critical component of the project’s overall objective to improve traffic flow and safety where McKinley Street intersects with a busy railway line, a canal, and another road, all at ground level.