June 5, 1869 | Illustration
This image from the June 5, 1869 issue of Harper's Weekly depicts a large celebratory gathering around the place where the Union Pacific and Central Pacific lines joined at Promontory Summit, Utah.
March 19, 1870 | Illustration
This image from the March 19, 1870 issue of Harper's Weekly depicts workers and a snow plow attempting to clear a snow drift on the Pacific Railroad.