Any city of this state is hereby authorized and empowered to acquire by gift, purchase or otherwise any sanitary sewers or sewage lines located within the corporate limits of said city or within a distance of three (3) miles beyond the corporate limits of said city, which facilities have been constructed and are in place. Such acquisition may be by gift, grant or purchase from the United States government or any agency thereof, or any other owner thereof. Such acquisition may be had by any such city when the governing body shall have adopted an ordinance declaring the acquisition of such sewers or sewage facilities to be necessary, convenient or useful to such city and that the same is of value to said city, its inhabitants, or to industries located in the immediate environs of such city and so located as to be served by such sewers or sewage facilities.