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4 Street S.W. Underpass Enhancement Project

Project update - October 4, 2017

Construction has now begun on this project which is anticipated to be completed by  Fall 2018.

​Crews have completed the following work on the east side of the underpass and the sidewalk is now open to pedestrians:

  • ENMAX below grade ductbanks upgrade;
  • New sidewalk concrete and retaining wall repairs;
  • New handrails; 
  • Concrete framework for new stairs connecting to 9 Avenue overpass;
  • Concrete framework for electrical room;
  • Improvements to the 3 Street turnoff for increased pedestrian safety;

Some work on the east sidewalk remains and will be completed in September 2018.

The west side of the underpass is now closed to pedestrians. Concrete work is currently ongoing on the west sidewalk and median. The expected completion date for this project including all work on the east and west sides of the underpass is November 2018. ​

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Project Overview

Th​e City of Calgary has begun construction on the 4th Street S.W. Underpass Enhancement Project.

Situated between 8th Avenue and 10th Avenue S.W., the 4th Street S.W. underpass is a main gateway and key corridor for pedestrians and vehicles moving between the Beltline and downtown core, servicing over 8,000 pedestrians each day.

The 4th Street S.W. underpass has been identified as a priority for public realm improvements under the Council-endorsed “Downtown Underpass Urban Design Guidelines.” The underpass redesign intends to address issues such as safety, connectivity, accessibility, vitality and beauty, improving the overall comfort of pedestrians who access the site.

The marc boutin architectural collaborative (MBAC) was awarded the tender to develop a schematic design for the underpass that will integrate architecture, infrastructure and artwork into the redesign of the space. Internationally-acclaimed artist Krzysztof Wodiczko is also part of this design team charged with reinvigorating the underpass.

This enhancement project is part of the broader Centre City Underpass Enhancement Program, which aims to improve the pedestrian environment and connections between the Beltline and downtown communities, including cleaning up and brightening existing underpasses.

Project timeline

​Date ​Purpose​
Fall 2017 ​Construction on enhancements begin
​Fall 2018 ​Anticipated completion

Supporting information


For more information on Centre City projects, please call 3-1-1.​