DOC spokeswoman Maria Peterson declined to comment Wednesday except to say the investigation is still open and the matter is under review by the Utah Attorney General's Office.
The inmates — who were being housed under a contract between the county and the Corrections Department — were transferred to the state prison, which had room for them because a recent decline in prisoner population there, the DOC said.
Susie Potter, a spokeswoman for the Daggett County Sheriff's Office, said in February that the allegations do not involve drugs or sex — which are common problems in jails — and that "we don't believe the inmates were ever in some kind of danger."
Sheriff's and DOC officials met April 11 to discuss findings in the investigation and the two officers, who had been put on leave in February, were fired as a result of the initial report, Wednesday's news release says.
Daggett County sits out on the state lines with Wyoming and Colorado and has a population of 1,127, according to the U.S. Census Bureau.
The situation has had a financial impact on the county, which is paid a daily rate to house each prisoner.
According to Department of Corrections records, Daggett County was paid about $1.35 million for inmate housing services in fiscal 2016. That money accounted for nearly 30 percent of the county's revenue.