Wyoming State Capitol

This project restored much of the State Capitol building’s grandeur of the past. This project was a continuation of the Wyoming State Capitol Square master plan, which involved an assessment and investigation of the 130-year-old National Historic Landmark. The late 1800s Renaissance Revival building is also listed on the National Register of Historic Places. 

Located in Cheyenne, Wyoming, the 504,000-square-foot building was outfitted with new mechanical, electrical, plumbing, fire protection, and information technology/audio-visual systems. The systems were routed throughout the building’s various structural systems, which included timber, steel, corrugated iron arches, and cast-in-place concrete.  

To incorporate the new systems without impacting the existing historic spaces, the team designed the underpinning of the load-bearing masonry walls to allow routing of new below-grade mechanical systems. The original heating shafts were removed and reconstructed to provide pathways for the new systems. 

Project Highlights:

• A third-floor infill was removed to reconstruct a two-story historic Supreme Court Chamber and viewing gallery. 
• By relocating the elevators, the team was able to open the central corridor and reconnect the House and Senate Chambers. 
• The project architect was HDR Architecture.