Phase 1 of the Calgary Green Line light rail transit project will provide residents of the largest city in Alberta, Canada, with more mobility options and reduced travel times. Calgary Green Line Phase 1 will connect Calgary’s southeast to its downtown with connections to the existing Red Line and Blue Line. Phase 1 will also connect to three rapid bus routes and provide an opportunity to expand the transit system in the future.

The City of Calgary Green Line Board has approved the Development Phase Agreement of this progressive-design-build procurement. As a key subconsultant, Delve Underground is providing engineering services to develop a portion of the design up to 60% to inform the estimate of the Target Price. The project is funded by federal and provincial governments with a CD$5.5B+ budget. The Development Phase design for Phase 1 commenced in Q2 2023 and will continue until Q3 2024.

The team is comprised of:

Owner: City of Calgary

Development Partner: Bow Transit Connectors, a JV consisting of Barnard Constructors of Canada LP and Flatiron Constructors Canada Ltd

Prime Designer: WSP Canada Inc

Sub-Designer: Delve Underground

Delve Underground’s scope is focused on the downtown segment, and involves the design of the twin bored tunnels, cross passages, cut and cover (C&C) segments, sequential excavation method (SEM) structures, support of excavation for C&C tunnels and stations, and other geotechnical services.

Delve Underground’s experience from the Broadway Subway Project in Vancouver, Canada, and the North East Link project in Melbourne, Australia, has proven valuable in the design of the Green Line because of the similarities in ground conditions and transit design.