On June 4th, 2004 an armored D-9 Caterpillar was used by disgruntled Granby businessman Marv Heemeyer in a rampage that caused an estimated $5 million in damage and left part of the town of Granby in rubble. Heemeyer's slow-moving, 90 minute demolition, fueled by his anger at local officials and business owners who supported construction of a cement batch plant, left 13 buildings demolished or damaged and ended when he committed suicide inside the cab that he had welded shut. The buildings targeted included the town hall, the library, the electric company, a bank, the newspaper and the home of the former mayor. The town of Granby was spared any human injuries or loss because of the complete evacuation of the town through the reverse 911 system and many local law enforcement officers who went door to door to warn the townspeople. The town of Granby immediately launched fundraising efforts to offset the losses suffered by targeted businesses and citizens and the destroyed buildings were mostly rebuilt by the following year.
