1. The board of county commissioners:
(a) In a county whose population is 55,000 or more, shall provide a facility for the detention of children.
(b) In all other counties, may provide a facility for the detention of children.
2. The boards of county commissioners of two or more counties, without regard to the population of the counties, may provide a combined facility for the detention of children under terms agreed upon by the boards of county commissioners and the juvenile courts of the affected judicial districts.
3. In addition to any facilities for the detention of children, a board of county commissioners may establish or maintain programs which provide alternatives to placing a child in a facility for the detention of children.