Last worker missing in power plant collapse could take weeks longer to find A national engineering firm and OSHA engineers will arrive to the site Tuesday Worker missing in power-plant collapse could take weeks longer to find By Brian Planalp | December 14, 2020 at 6:23 PM EST - Updated December 15 at 5:43 PM ADAMS COUNTY, Ohio (FOX19) - The missing worker at a collapsed Adams County power plant could take up to two more weeks to find, according to the demolition company working at the site. The collapse occurred Wednesday, Dec. 9 before the controlled demolition of one of the buildings at Killen Generating Station, which closed in 2018.