The Utah Department of Transportation is asking all-terrain vehicle and dirt bike enthusiasts to stay clear of I-215 construction near Knudsen's Corner, 62nd South and 23rd East.

Survey stakes, strings and inspection markings have been destroyed by the recreation vehicles, said Kim Morris, UDOT community relations director.Motorists with questions about the construction near the mouth of Big Cottonwood Canyon can call a special Utah Department of Transportation number weekdays between 8 a.m. and 5 p.m. for information on traffic delays and other problems caused by the project. The number is 965-4215.

ATV riders will be among those inconvenienced.

"The problem is that for many years the residents have had a big playground there for the ATVs and dirt bikes," he said. Contractors, however, are getting ready to pour concrete in the area and are discouraged to discover that they must repeat their previous day's work each morning.

"In our push to get these projects done on a very tight schedule," Morris said, "time is something we don't want to lose.

"I guess the contractor has gnashed his teeth a couple of times over this," he said.

While Morris said he does not believe the riders are purposely causing problems, he hopes they will cooperate so the I-215 project can proceed as scheduled. The sheriff's office has been asked to help patrol the area in the meantime.

The work will be completed in two phases. The first, from 20th East to Knudsen's Corner, is set for completion by Aug. 1. The second phase, Knudsen's Corner to 45th South, should be open by Dec. 1.