MANCHESTER, Ohio — The demolition company that lost workers in a southern Ohio power plant collapse said Monday recovery efforts for the last one will continue into next month.

Patrick Crowley, a spokesman for the Detroit-based Adamo Group, said recovery work is expected to be complete in mid-to-late January. He said in a statement that the company is taking direction from the U.S. Occupational Safety and Health Administration in recovery efforts and is cooperating fully with efforts to determine the cause of the Dec. 9 collapse.

The company has retained New York-based engineering firm Thornton Tomasetti to assist recovery efforts. Three workers at the site survived, while two were lost.

A worker whose body was found in rubble was identified earlier as a 42-year-old northeastern Kentucky man, Doug Gray of Greenup County.

Another man — Jamie Fitzgerald, of Boyd County, Kentucky — remains unrecovered from the Killen Generating Station site.

Three other workers were saved and were sent to the hospital for their injuries. The extent of the injuries remains unknown. 

On Dec. 15, Adamo Group released a statement and said it could take up to two weeks to five Fitzgerald due to the heavy debris. 

"We trust there is an understanding of how his process must be done in a manner that does not pose a safety hazard to those working on the recovery effort and is done with as much sensitivity as is possible. Our thoughts and prayers continue for Jamie’s family, fiancé, friends and co-workers," wrote Adamo Group. 

It's unknown what caused the collapse. The Adams County Sheriff's Office said the roof of the power plant collapsed around 8:30 a.m. on Dec. 9. Workers were there prepping the building for demolition. The coal-fired generating station opened in 1982 and closed in May 2018. It is located some 75 miles east of Cincinnati.