Project Update

August 4, 2023

What’s Happening in Traffic

Single lane of alternating traffic on Highway 8

On Tuesday, August 8, in the late evening, Highway 8 will be reduced to a single lane of alternating traffic to install overhead signs. Please expect delays.

A pre-assembled overhead sign is loaded onto a truck by crane to be transported to the installation site

All work is weather dependent. Please check 511 Alberta and The City of Calgary’s traffic information map for up-to-date information on traffic detours and speed reductions. For all other project information, please visit

We appreciate your patience during construction.

Pathway Closure: Valley Ridge to Bowness Park

The regional pathway on the south side of the Bow River remains closed for repairs as a result of flood damage. Further details will be provided as they become available.

Please visit the City of Calgary’s pathways & bikeways map for current information on pathways

Storm Ponds Can Be Dangerous

Please keep children and pets away from storm ponds. Water levels in storm ponds can change quickly and because their purpose is to collect pollutants in water runoff, the water quality is poor.

Please visit The City of Calgary’s website for helpful information about storm ponds.

Storm ponds might seem inviting but contact with the water can be harmful because it can contain bacteria, fertilizers, pesticides, vehicle fluids, metals and road salt
Storm pond west of Valley Ridge in the winter

Surfacing Stoney Trail

Last week, the first lift of asphalt was placed on much of Stoney Trail between Bow Trail and 17 Avenue S.W.

An aerial photo taken July 26, 2023 shows Stoney Trail between 17 Avenue S.W. (bottom) and Bow Trail (top)
Paving northbound Stoney Trail approaching Bow Trail
Standing on the northbound lanes looking south at 17 Avenue S.W.

17 Avenue S.W. Transformation

The area around the 17 Avenue S.W. interchange has required considerable earthwork to excavate bedrock deposits to the north and east, add suitable fill for the road subgrade and shape connections to the east, west and south.

Looking southeast at the 17 Avenue S.W. interchange in June 2022; the grey material is bedrock deposits
Looking southeast at the 17 Avenue S.W. interchange in October 2022 with the temporary connection between the new bridge and the original road
Looking southeast at the 17 Avenue S.W. interchange in July 2023 with the temporary connection removed and final ramp construction underway

The ramps from northbound Stoney Trail to 17 Avenue S.W. actually start just north of Highway 8.

Looking north at the Highway 8 interchange and ramps for 17 Avenue S.W.*

Highway 8 Interchange

More than 2,000 cubic metres of concrete was used to form the deck on the 225-metre long flyover bridge. This is almost enough concrete to fill an Olympic-sized swimming pool. All sections have now been poured, marking another major milestone as this was the last bridge deck to be poured for the South project.

Roadwork for the interchange is also progressing, with earthwork for most areas approaching final grades.

Looking southeast at the Highway 8 interchange*
Looking southwest at the Highway 8 interchange*

*Please note: The arrows are meant to illustrate the layout of the final roads; further detouring can be anticipated as Highway 8 interchange construction continues.