S.D. Codified Laws § 26-7A-26
No apparent, alleged, or adjudicated abused or neglected child may be securely detained at any time in a jail, lockup, or in any type of detention or temporary care facility containing adult prisoners. An apparent, alleged, or adjudicated child in need of supervision may not be securely detained in a jail, lockup, or in any type of detention or temporary care facility containing adult prisoners except for approved collocated detention centers as defined in § 26-7A-1 and as authorized in §§ 26-8B-3, 26-8B-6, and 26-7A-20.
An apparent or alleged delinquent child may be held in an adult lockup or jail for up to six hours for purposes of identification, processing, interrogation, transfer to juvenile facility, or release to parents if the child is sight and sound separated from adult prisoners.
In any area not designated as a metropolitan statistical area by the United States Bureau of the Census, an apparent or alleged delinquent child may be held in an adult lockup or jail for up to forty-eight hours excluding holidays and weekends or until the temporary custody hearing, whichever is earlier, if the facility has been certified by the Department of Corrections as providing sight and sound separation of juveniles from adults and if no suitable juvenile facility is available.
A child who has been transferred to adult court pursuant to § 26-11-4 or a child who is being tried in circuit court as an adult pursuant to § 26-11-3.1 may be held in an adult lockup or jail if physically separated from adult prisoners.
A child who has attained the age of majority who is under the continuing jurisdiction of the court or the Department of Corrections may be held in an adult jail or lockup. A child under the age of eighteen years who has been transferred to adult court pursuant to §§ 26-11-3.1 or 26-11-4 and who has been convicted of a felony as an adult may be held in an adult jail or lockup.
SDCL 26-7A-26