STOUGHTON, Wis. (AP) – A propane tanker truck has overturned on an icy Dane County road and leaked a small amount of gas.  Sheriff’s officials say the tanker carrying 2,600 pounds of propane slid on a curve on Lake Kegonsa Rd. in the town of Rutland about 7:30 a.m. Thursday.   The driver of the truck wasn’t injured. Sheriff’s spokeswoman Elise Schaffer says no evacuations in the area were necessary.  The road is expected to be closed until late morning.