Whereas by the twelfth section of an act of Congress entilded "An act to aid in the construction of a railroad and telegraph line from the Missouri River to the Pacific Ocean, and to secure to the Government the use of the same for postal, military, and other purposes," approved July 1, 1862, it is made the duty of the President of the United States to determine the uniform width of the track of the entire line of the said railroad and the branches of the same; and
Whereas application has been made to me by the Leavenworth, Pawnee and Western Railroad Company, a company authorized by the act of Congress above mentioned to construct a branch of said railroad, to fix the gauge thereof:
Now, therefore, I, Abraham Lincoln, President of the United States of America, do determine that the uniform width of the track of said railroad and all its branches which are provided for in the aforesaid act of Congress shall be 5 feet, and that this order be filed in the office of the Secretary the Interior for the information and guidance of all concerned. Done at the city of Washington, this 21st day of January, A. D. 1863.
Abraham Lincoln, Executive Order Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/203097