Red Cliff Arch Bridge Rating

Minturn, Colorado

Tsiouvaras Simmons Holderness was tasked with providing CDOT with an analysis of the historic Red Cliff Arch Bridge, built in 1940 near Minturn, Colorado; the state’s only remaining steel deck arch bridge. When ultrasonic testing indicated that corrosion existed inside the spandrel columns, TSH analyzed this complex bridge to determine the load rating for the spandrel columns, while considering the effects of section loss due to corrosion. The results were critical in determining rehabilitation options for this signature bridge. The results indicated that the columns still had enough section left and didn’t need to be rehabbed yet. CDOT is currently measuring the columns again to ensure the corrosion has arrested.

  • Completed load ratings for the spandrel columns
  • Determined bridge rehabilitation recommendations