Hutchinson's fire chief is getting a crash course in geology, as a sink-hole continues to grow in the central Kansas town. The sink-hole, near some railroad tracks, is about 200 feet across and about 20 feet deep. Fire Chief Kim Forbes jokes that the next division of his department will be the ``Sink-hole Division.'' But the sink-hole, on land that was once part of a salt company's evaporation plant, is a serious issue. Nearby landowners worry that it will drive down property values, and trains that use the nearby tracks must travel at reduced speeds. Workers are trying to stabilize the hole, pouring in a cement-sand mixture into its north bank. Drilling efforts will soon begin, to find out where the underground cavity is and where the break took place.