a parcel of land owned in fee by the Northern Indiana Public Service Company and used for high voltage electrical transmission lines, pipelines, and utility purposes, beginning at said Company’s Dune Acres substation and extending east to said Company’s Michigan City Generating Station, which parcel by this subchapter is included within the boundaries of the Indiana Dunes National Park and herein designated as area II–I on National Park Service Boundary Map No. 626–80,033–B, dated October 1986, excluding that certain parcel of approximately 6.0 acres adjacent Mineral Springs Road in areas II–I, and

land owned in fee by the Northern Indiana Public Service Company and used for high voltage electrical transmission lines, pipelines, and utility purposes as has by this subchapter been included within the boundaries of the Indiana Dunes National Park and herein designated as area II–H on said National Park Service Boundary Map No. 626–80,033–B.