Edmonton's controversial calcium chloride program to continue, council decides

The city will continue piloting an anti-icing agent on Edmonton streets despite the gaining controversy over the issue.

Anti-icing pilot project got more flak last week after study was made public

The City of Edmonton continues to use a blend of salt and calcium chloride to clear nearly 3,000 kilometres of road. (Zoe Todd/CBC)

The city will continue piloting an anti-icing agent on Edmonton streets despite controversy over the program.

At a meeting Tuesday, city council agreed to follow through with the pilot until the end of the winter, despite city findings showing the city's calcium chloride brine damages roads 20 per cent more than salt alone. 

Coun. Jon Dziadyk said Edmontonians have a strong opinion on the use of calcium chloride.

"I've heard quite clearly from them, generally speaking, overwhelmingly people don't like the product."

Gord Cebryk, deputy city manager of operations, still recommended continuing the pilot so the city is able to draw full conclusions on the impact of calcium chloride on infrastructure.

The findings from a spring study were outlined in a memo in June 2018. That memo wasn't shown to council and only made public last week after media asked for it under a Freedom of Information request.

Coun. Aaron Paquette wanted to make sure the findings will be transparent and made available to the public.

Paquette was one of six councillors who voted against extending the pilot last October.

"It just comes down to trust. We just need the public to have trust that we're trying to do the right thing."

Some residents, observing more rust on their driveways and vehicles than in previous years, are blaming calcium chloride.

Several councillors, including Coun. Michael Walters, expressed the need to see the pilot through the winter to also determine the role salt is playing in corrosion.

"It's probably the percentage of the ratio of salt in the mix, that's probably the culprit,"  Walters said. "That's what the pilot is supposed to take us through, and so by the end of this, we may not have the exact answer but we should be a lot clearer on what the best way forward is."

Calcium chloride ending up on driveways and vehicles is likely coming from sources other than the city project, Walters suggested.

Last October, Edmonton city council voted to extend the calcium chloride pilot project for a second year. (Natasha Riebe/CBC)

The province uses a calcium chloride solution on highways like Anthony Henday Drive. During the first year of the Edmonton pilot project, the city used the solution on about 30 per cent, or 2,840 kilometres, of road.

In October, council voted to expand the project to another 295 kilometres of road. 

"My assertion is that it's a bit of a stretch to suggest that calcium chloride is behind the alleged carnage that's being reported to people's vehicles and private property," Walters said.

Cebryk agreed it's difficult to pin down what's causing damage to private driveways, noting that some residents buy bags of salt containing the same substance. 

"Unless you have a control point and have some definite observations on that particular driveway and what's going on and off of it, it's hard to say."

Walters noted that safety and esthetics were two reasons the city decided to try calcium chloride and move away from sand and tiny rock chips.

"We can go back to sand and get a whole bunch of other emails from people who think the city's ugly, but that's the trade off."

The operations branch will analyze data from the pilot project and is expected to check in with council in June with a full update in August.




Natasha Riebe


Natasha Riebe landed at CBC News in Edmonton after radio, TV and print journalism gigs in Halifax, Seoul, Yellowknife and on Vancouver Island. Please send tips in confidence to natasha.riebe@cbc.ca.


To encourage thoughtful and respectful conversations, first and last names will appear with each submission to CBC/Radio-Canada's online communities (except in children and youth-oriented communities). Pseudonyms will no longer be permitted.

By submitting a comment, you accept that CBC has the right to reproduce and publish that comment in whole or in part, in any manner CBC chooses. Please note that CBC does not endorse the opinions expressed in comments. Comments on this story are moderated according to our Submission Guidelines. Comments are welcome while open. We reserve the right to close comments at any time.

Become a CBC Member

Join the conversation  Create account

Already have an account?