Old Courthouse Renovation at Gateway Arch National Park

A landmark of American history and civil rights, the Old Courthouse in Downtown St. Louis has undergone a once-in-a-generation renovation to improve accessibility, preserve historic features, and support new exhibit installations. Built between 1839 and 1862, the courthouse is part of Gateway Arch National Park and famously hosted the Dred and Harriet Scott freedom trials.

KPFF supported this multi-year, multi-phase project by leading critical structural upgrades to ensure the building can continue welcoming the public for generations to come. Our team conducted a detailed study of the original 19th-century construction, analyzing the structural capacity of the North Wing’s first and second floors. We then designed floor strengthening systems to safely support new exhibits and increased occupancy. Additional scope included ADA upgrades such as new ramps and elevators, as well as the structural integration of new building systems.

The renovation marks the final phase of the CityArchRiver initiative and honors the building’s enduring legacy with thoughtful updates that meet today’s standards while preserving its historic character.

https://www.youtube.com/watch?app=desktop&v=x8aH4VhSLq4#bottom-sheet

https://www.nytimes.com/2025/04/21/arts/design/st-louis-courthouse-gateway-arch.html