; or (B) where existing utility or pipelines have been placed. (3) Network The term Network means the Transcontinental Railroad Network established under section 4. (4) Park The term Park means the Golden Spike National Historical Park designated under section 3. (5) Secretary The term Secretary means the Secretary of the Interior, acting through the Director of the National Park Service. (6) Transcontinental railroad The term Transcontinental Railroad means the approximately 1,912-mile continuous railroad constructed between 1863 and 1869 from Council Bluffs, Iowa, to San Francisco, California. 303. Redesignation (a) Redesignation The Golden Spike National Historic Site designated April 2, 1957, and placed under the administration of the National Park Service under the Act of July 10, 1965 (79 Stat. 426), shall be known and designated as the Golden Spike National Historical Park . (b) References Any reference in a law, map, regulation, document, paper, or other record of the United States to the Golden Spike National Historic Site shall be considered a reference to the Golden Spike National Historical Park . (c) Network The Park shall be part of the Network. 304. Transcontinental railroad network (a) In general The Secretary shall establish, within the National Park Service, the Transcontinental Railroad Network. The Network shall not include properties used in active freight railroad operations (or other ancillary purposes) or reasonably anticipated to be used for freight railroad operations in the future. (b) Study The Secretary shall— (1) inventory National Park Service sites, facilities, and programs