Grumbling over gravel in Dawson City

Some people in Dawson City, Yukon, saymaterial being used on local roads is puncturing a lot of tires.

'We're probably getting 40 tires a month with these rocks in them," saidDustin McCulley, who owns Endurance Automotive.

He says the shop's three full-time employees have been busy patching flats.

McCulleyhas been in business in Dawson City since 2004. He suspects something has changed in the rock used on highways by the Yukon government.

"[It's] a dark black rock that's in the shape of an arrowhead. One end's flat and one end is pointed like a razor. It pushes right through our soft winter tires," he said.

Customers have told him thatonearea near Rock Creek is especially bad.So far, the affected vehicles have all been minivansand small cars, McCulleysays.

"We're predicting that most of this is coming from the sanding trucks. We don't know where else it would be coming from," he said.

"This is one of the worst years I've seen."

Fixing a flat with a patch costs $25 at hisshop.

"Some people are coming in with three in a week the same tires punctured three times," he said.

McCulley says a few customers have complained to Yukon's Department of Highways and Public Works.

He seems to be the only shop in Dawson to notice a problem, though.CBCalso called Small Town Automotive, andBonanza Klondike Inc., and neither said they were dealing with more flats this year.

Nothing has changed, department says

Yukon's Department of Highways and Public Works says it doesn't understand the complaints.Spokesperson Doris Wurfbaum says the department has been using the same material foryears.

She describes it as an "engineered, 10-millimetrestandard aggregate," which is used on roads and highways throughout Yukon.

"This is the first I've heard of it, certainly," she said of complaints.

"I cannot really speak to the issue of flat tires. Our number one priority is safety on the highway. We need an aggregate that is going to stick to the road to increasefriction and traction for the travelling public," she said.

Driver wants sample tested

But Hector Renaud, a placer miner and longtime Dawson resident, is also convinced there's a problem. Herecently puncturedtwo tires, whiletravelling to Dawson from Flat Creek.

He says the crushed rock has "flint-like shards" and he believes it's only a matter of time before someone runs into real trouble.

"Who carries two spares?" Renaudasked.

"At some point, at 40below, this will create a situation where a family with kids will be stuck out on the road with two flat tires, or blow out a tire and create a vehicle in the ditch or worse, a roll-over accident," he said.

Renaud has collected a sample and is hoping an independent party will identify the sharp material.

"I'm told it's a lava rock-type material. When you crush lava rock, all you get is nice, sharp razor edges," he said.