The Inuvialuit Energy Security Project (IESP) included the design and installation of a 33-meter steel girder concrete deck composite bridge in the Northwest Territories. This structure served as a vital infrastructure link in a remote and challenging environment. Arch Engineers led both the engineering and installation management, overcoming complex logistical and environmental hurdles.
Crews installed the bridge during winter, with the creek completely frozen. To address the unique conditions and ensure safety, Arch Engineers created an innovative method using two excavators instead of cranes. One excavator moved the hoisted bridge roughly 10 meters before placing it on custom-designed pedestals. From there, the team slid it into position on the abutment bearings.
The operation required careful planning at every stage. Arch Engineers designed temporary bearing cribbing to support the bridge throughout the installation. They also implemented strict winter protocols, including procedures for rigging, equipment inspections, fuel and lubricant management, and operational safety. Crews monitored weather conditions closely and restricted hoisting when wind speeds exceeded safe limits.
Despite the harsh climate and remote location, Arch Engineers completed the project on time and within budget. Their innovative lift strategy, along with a strong safety and operations framework, made it possible. This successful installation of the IESP bridge highlights Arch Engineers’ expertise in delivering reliable infrastructure solutions; even in the most extreme northern conditions.