Dennis W. McColgan III, 76, of Chillicothe, passed away at 9:20am February 25, 2007, in Adena Regional Medical Center. He was born November 8, 1930, in Philadelphia, PA, to the late Dennis W. II and Marie McKenna McColgan. On November 29, 1980, he married the former Mary L. Butts, who survives. Also surviving are his son Robert E. Byers, of Jena, LA; daughter and son-in-law Elizabeth A. (Ryan) Cartwright, Piketon, OH; grandchildren Lindsey Ealey, Nathanial Richardson, Christopher Byers, Allen Smith, Serena Cartwright, and Ryan Cartwright; his twin sister Marie (Bob) Grove; brothers Philip (Shirley) McColgan; Joseph McColgan; and John (Betty) McColgan; and numerous nieces, nephews, great-nieces, and great-nephews. Dennis was a retired Gunnery Sergeant in the US Marine Corps following 21 years of service. He then retired from the Veterans Affairs Medical Center where he worked as a food service supervisor. He was a member of the American Legion, the VFW, the Port O' Morgan Boat Club, and the Fleet Reserve Association. Mass of Christian Burial will be celebrated 3:00pm Friday at St. Mary Catholic Church, Rev. Lawrence Hummer, Celebrant. Military burial at sea will follow. Friends may call Thursday from 5-8pm at Haller Funeral Home where a wake service will be held at 8:00pm. Memorial contributions may be made to Bishop Flaget School, 570 Parson Ave., Chillicothe, OH 45601.