Freeze-thaw cycle makes work for road crews, fun for warm weather enthusiasts

Warm temperatures continued in Edmonton on Tuesday with a high of 9 C, but it's the freeze-thaw cycle that creates more work for city road crews and concrete cutters.

With a wet, melted layer on the frozen pond at Hawrelak Park, close to a hundred skaters took advantage of the weather that was more fitting for wearing asweater than a heavy winter jacket.

"It's beautiful. It's nice,"Sashya Churchill said.

"We're such an indoor town, so to have all this nice warm weather, it's a good break."

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The warm temperatures create a change of plans for Edmonton's road clearing crews. On Tuesday, their plows sat in the garage while their steam rollers revved up toflatten pothole filler.

"With the freeze-thaw cycles that are occurring and the amount of moisture on the roads, and depending on what the temperature gets to in the evening, the potholes tend to pop up overnight," said John Potter, the city's acting superintendent of operations for roadway maintenance.

"We switch over pretty seamlessly when that happens."

Above zero temperatures have so far this season been followed by the usual cold temperatures a normal cyclefor Alberta winters.

This can lead to water main breaks as the ground shifts. From Jan. 1 of this year until Feb. 14, Epcor crews have responded to 58 water main breaks.

At this same time last year, they fixed 43 water main breaks.

Concrete crews assistin the repairs. They cut through the concrete, allowing Epcor workers to get to the busted water main.

Once it gets cold again,TrevorGoertzen, a general manager with Derrick Concrete Cutting and Construction, expects the late night emergency calls to start.

"We'll be watching the phones for those," he said."It's usually water lines. We get the calls when the water lines get broken."

As many Edmontonians take advantage of the warm weather that follows a freeze, Goertzen just wishes the weather was more consistent.

"We've got a lot of projects on the go," he said.

"I'd like it to thaw and be done with or to be frozen and be done with. For our business, the in between stuff doesn't work for us, because you can't make a solid plan."

@Travismcewancbc

Travis.McEwan@cbc.ca