When a deteriorating structure on Country Road 137 in Glenwood Springs, Colorado was failing and needed to be replaced, Garfield County went in search of a replacement structure. Located in the Rocky Mountains, the structure provided vehicular passage over Canyon Creek. The high flow velocities of the Creek were creating scour concerns, and the existing structure was being undercut.
As the best replacement option, a 33' x 11'-11 1/8” CON/SPAN® O-Series® Bridge System, 32' in length, was selected for its cost effectiveness, speed of design, and quick installation. It was also able to handle the high flow velocities and helped improve the potential of foundation scour. All of the precast components were installed via crane in just one day.
"This structure fit the location well," stated Eric Brynildson, Project Engineer with Colorado River Engineering. “The CON/SPAN allowed an increased flow capacity with limited cover height required to the road surface. The structure was placed on a cross slope with the creek, which allowed reduced foundation depth. The precast structure was delivered in sections and placed all in one day which expedited the construction schedule and reduced the risk of damage during high runoff season.”
The major challenges overcome during this project included budget, speed of installation, and scour. The original structure remained in place during installation of the structure to provide access to residents.
"With Contech Engineered Solutions’ ability to provide engineering support as well as supply materials, the entire process was efficient and expedited," concluded Brynildson.