HPC for a Context Sensitive Bridge Replacement

This article describes the replacement of the U.S. Route 97 bridge over Spring Creek in Klamath County, Oregon. Route 97 bisects Collier Memorial State Park and Logging Museum grounds. The new bridge, called Collier's Promenade Bridge, consists of variable depth precast concrete girders, which provide a context-sensitive solution to replicate the arch shape of the original cast-in-place reinforced concrete bridge. The original bridge, called the Romeo and Juliette Bridge, was a reinforced concrete deck girder bridge with a 60-foot long main span that incorporated a radial girder haunch. This bridge was built in 1946 and had walkways beneath it that were cantilevered from the architecturally treated abutments. The walkways allowed park visitors access to each side of the Collier Memorial Park without crossing U.S. 97 at grade. The author describes the influence of Conde B. McCullough, known for historic coastal bridges, on the design and subsequent naming of this bridge replacement. The article concludes by describing the role that high performance concrete (HPC) played in this bridge project. Photographs depict both the old and new bridges.