61 Pa.C.S. § 1764

Joint detention facilities shall be constructed by contract or contracts let by the county commissioners of the counties to the lowest responsible and best bidder after due advertisement in at least one newspaper, published in each of the counties joining in the erection of the joint detention facilities, once a week for two consecutive weeks. When so constructed, the joint detention facilities shall be equipped by the county commissioners of the counties at the cost of the counties in the same manner as other county buildings are equipped.