The Department of Natural Resources, on behalf of the State of Illinois, is authorized to acquire by donation from the City of Wilmington in Will County, Illinois and other owners the existing Kankakee River dam and its abutments, millrace, millrace structures, and all other improvements constructed in connection with the dam; the sites on which the dam, abutments, millrace, millrace structures, and other improvements are constructed; and all water, flowage easements, and other privileges at law or in equity that the present owners or their predecessors acquired in and to the property.