NORRIDGEWOCK — One man remains hospitalized after a head-on collision Tuesday night in which a Farmington woman died and her son was injured on Waterville Road.

Somerset County Chief Deputy Michael Mitchell said in a media release Wednesday morning that the agency was dispatched to the fatal accident involving two vehicles around 7:15 p.m.

Mitchell said that Sally McKinley, 85, of Farmington was heading south in her 2003 Cadillac Deville when she collided in her travel lane with Joshua Savage, 31, of Norridgewock. Savage was operating a 2010 Ford Fusion and heading north. McKinley died upon impact, Mitchell said.

Factors in the crash were not identified on Wednesday evening, and Mitchell said that there had been no indication that speed was a contributing factor. The speed limit traveling northbound is 55 mph.

McKinley’s son, William, 57, of Farmington, a passenger in her vehicle, was transported by Emergency Medical Service to Redington-Fairview General Hospital in Skowhegan, where he was treated for rib and wrist injuries. Both McKinley and her son were wearing seatbelts.

Wednesday evening, Mitchell said that McKinley’s son had been released from the hospital.

Savage was transported to Redington-Fairview and subsequently airlifted to Eastern Maine Medical Center in Bangor where he is listed in critical condition as of Wednesday morning. Savage was not wearing a seatbelt.

Mitchell said Wednesday evening that his office was waiting for an updated report on Savage’s condition from the hospital, but still believed him to be listed as critical.

The crash was forensically mapped and reconstructed by Cpl. Joseph Jackson and Brian Crater of the Somerset County Sheriff’s Office. Deputy Isaac Wacome is the primary investigator and was the first deputy at the scene. Also assisting at the scene were Cpl. Matthew Cunningham, Maine State Police and the Norridgewock Fire Department.