US 6 and 19th Street Interchange

Golden, Colorado

Tsiouvaras Simmons Holderness provided construction management and inspection services to the City of Golden to complete the local agency ‘Linking Lookout’ interchange project at US 6 and 19th St. This $25M CM/GC project featured a multi-modal transportation facility spanning US 6 with a covered “tunnel” that carries 19th Street and a fully landscaped park. The cover design is the first in Colorado to be implemented over a major highway. The design included a special monolithic membrane to allow for irrigation and to prevent moisture from permeating through the bridge. The design used a light weight soil to help reduce the overall dead load of the bridge while maintaining the proper nutrients to produce vegetation and minimal future maintenance.

  • TSH provided an Assistant Project Engineer for construction administration and senior inspection
  • Precast side-by-side box girder bridge
  • Included 36,000 Square Feet of top down soil nail walls