An Idaho trucker's vehicle suffered between $30,000 and $35,000 damage Sunday when a blown tire ignited a second tire and the fire spread up into a trailer-load of coal, Clearfield Fire Chief Roger Bodily said.

The fire occurred shortly before 11 a.m. on I-15 near the Clearfield exit and backed up traffic on the highway to the Layton interchange for about 15 minutes, Bodily said.Bodily said the semitrailer truck with a double trailer-load of coal, driven by Walt Twomey, Ashton, Idaho, was northbound when the fire started. The driver noticed smoke, Bodily said, and was trying to get to a truck stop in Ogden.

The blown tire generated enough heat and friction on the dual wheel next to it to ignite the tire, Bodily said. The fire then spread up into the trailer and part of the load of coal.

Bodily estimated the damage to the trailer, owned by A.B. Tibbitts, Teton City, Idaho, at between $30,000 and $35,000. The truck driver detached the two trailers from the tractor, Bodily said, to prevent the fire from spreading to it. There were no injuries.