Aberdeen, SD - NuStar Energy found a leak in one of their diesel pipeline just a few miles north of Aberdeen in a frozen slough on Monday.  KELOLand News is reporting the company's monitoring system detected a leak in the line Monday night, and the line was immediately shut down.  Local and state agencies worked on Tuesday to cleanup the spill, and cleanup efforts continue.  Officials from NuStar say there is no public danger and the situation is under control.