COWI Engineers Complex Launch of Alaska’s Juneau Creek Bridge
Engineering solution moves nearly 7 million lb of structural steel across remote canyon in one of the longest steel plate-girder launches of its kind ALASKA: Global engineering consultancy COWI has completed the erection engineering behind the launch of the Juneau Creek Bridge across one of Alaska’s most challenging bridge sites, using specialized temporary works, staged structural analysis and wind engineering to move nearly seven million lb of structural steel across the canyon. The bridge is the signature structure on the Alaska Department of Transportation and Public Facilities’ (AKDOT&PF) Sterling Highway MP 45–60 project near Cooper Landing. Its 440-ft main span crosses a steep, environmentally sensitive canyon where conventional erection from below was severely constrained. Rather than constructing the superstructure piece by piece over the canyon, the project team assembled the full-width, five-girder steel superstructure on one side before launching...