Keywords: Letter from Union Pacific Railroad to Secretary of the Interior Signifying Union Pacific's Acceptance to the Pacific... - NARA - 302004.tif Union Pacific Railroad to Secretary of the Interior Signifying Union Pacific's Acceptance to the Pacific Railroad Act of 1863 Scope and content General notes 302004 Local identifier Department of the Interior Lands and Railroads Division 1870 - ca 1907 Most Recent <br /> Department of the Interior Office of the Secretary 1849 - Predecessor William Butler Ogden President UPRR; Henry V Poor Secretary UPRR Archives II Reference Section Civilian Textual Archives Services Division NWCT2RC National Archives at College Park 8601 Adelphi Road College Park MD 20740-6001 1863-06-21 Record group Record Group 48 Records of the Office of the Secretary of the Interior 1826 - 2006 Record group ARC 377 Railroad Packages compiled 1849 - 1901 Series ARC 301998 File unit Railroad Package 239 1864 - 1864 File unit ARC 302003 Variant control numbers HMS/MLR Entry Number A1 598<br /> NAIL Control Number NWCTC-48-598-239-1<br /> NAIL Control Number NWCTC-48-RRPACKAGES-239-1 yes Other versions NARA-cooperation PD-USGov First Transcontinental Railroad Union Pacific Railroad |