Project Update – December 6, 2021
What’s Happening in Traffic This Week
Single Lane of Alternating Traffic on Old Banff Coach Road S.W.
For approximately one week starting Wednesday, December 8, 2021, Old Banff Coach Road S.W. will operate as a single lane of alternating traffic east of 101 Street S.W. between 8:30 a.m. and 4:30 p.m. each day for utility installations. Please drive cautiously and watch for flag persons directing traffic.
Winter Driving in Construction Zones
As we all get used to winter driving conditions once again, remember that it can take up to 12 times longer for a vehicle to come to stop in snowy or icy conditions than on a dry road.
The construction crossings on Old Banff Coach Road S.W., 101 Street S.W. and 17 Avenue S.W. will continue to be used through the winter. Watch for flag persons directing traffic, obey the traffic signals and leave yourself extra room for stopping. Drivers are legally required to drive to conditions, which may mean driving slower than the posted speed limit.
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 westringroad.ca.
We appreciate your patience during construction.
Secant Pile Retaining Wall
The retaining wall between Canada Olympic Drive S.W. and the ramp from eastbound Trans-Canada Highway to Bowfort Road N.W. is called a secant pile wall. In mathematics, a secant is a straight line intersecting a curve at two or more points. Roughly translated for this application, the secant retaining wall is constructed with overlapping concrete piles.
Augering steel caissons next to Canada Olympic Drive S.W.; this type of wall can be constructed near existing infrastructure without issues caused by noise and vibration
Piles for the secant wall alternate between reinforced and non-reinforced piles.
A steel cage is dropped into the hole and the hole is filled with concrete to form the reinforced pile
The non-reinforced piles are drilled just offset from the reinforced piles so they overlap, then backfilled with concrete
Once the concrete cured, the area north of Canada Olympic Drive S.W. was excavated for the ramp from eastbound Trans-Canada Highway to Bowfort Road N.W.
Drilling drainage holes in the secant pile retaining wall 
Subdrain installed along the wall and connected to the stormwater management infrastructure
Bridge Construction at Highway 8
The abutments are complete for two of the three bridges on the Highway 8 interchange and piling for the foundations is underway.
Piling on the east abutment for the westbound to northbound Stoney Trail bridge
Looking southeast at compacted pit run on the west bridge abutment, with the east bridge abutment and temporary shoring wall in the background