G37 Interchange – Stage 1 Detour

Calgary, AB

ISL and CH2M HILL partnered as lead consultants to the City of Calgary for functional planning, design and construction of a grade separated interchange at Glenmore Trail and 37 Street SW that would eventually serve as the detour for Alberta Transportation’s Southwest Ring Road (SWRR) construction.

Five Months

The goal of opening Glenmore Trail to free flow traffic and removing commuter congestion for over 70,000 vehicles per day has been a publicly stated objective of the City for well over a decade — this project solved the long-standing issue in only five months.

Recycled and Reused

Key innovations included building Calgary’s first roundabout interchange and designing a recyclable overpass bridge with a pre-cast superstructure built in a record-setting 23 days. ISL’s sustainability decisions included reusing existing girders and not having piles for the abutments, making the panels fully reusable and enabling easier dismantling of the temporary overpass bridge.

Award Winner

The G37 Interchange won a 2011 Consulting Engineers of Alberta Award of Excellence for Project Management.

"This team did an outstanding job of documenting how it developed and applied best practices in project management strategies and processes to successfully meet the complex challenges and timelines. A textbook example of how such projects should be done!"
— CEA Showcase Award judge's comment
(Alberta Innovators magazine, spring 2011)



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