A lumber components store in Mount Horeb suffered as much as $1 in damage after a fire Saturday, the Mount Horeb Fire Chief said. The Mount Horeb Fire Department responded to a structure fire at Brunsell Lumber and Millwork, 1204 E. Lincoln St., just after 4:20 p.m., Craig Brinkmann said. Responding firefighters encountered heavy black smoke throughout the building. The heavy smoke in addition to the size and complexity of the structure made locating the fire difficult, Brinkmann said. Preliminary findings point to the fire starting in accessory equipment, then spreading and damaging a large saw and conveyor system, he said. The fire was contained to a small area in the building, but heavy smoke and smoke damage was present throughout the structure, he said. Assisting units came from Barneveld, Black Earth, Dodgeville, Fitchburg, Verona, Cross Plains and Belleville. The damage is estimated between $750,000 and $1 million dollars, Brinkmann said.