The Transcontinental Railroad Grade Segment, built as part of the original transcontinental railroad system in 1869, is significant because of its depiction of the development of America during the nineteenth century. This abandoned portion of the original railroad grade is physical evidence of the country's enthusiastic undertaking to connect the east with the west, an undertaking that resulted in the strengthening of the country's political and economic ties. It illustrates the competitive nature of the construction process surrounding this endeavor because this section of the Union Pacific Railroad line parallels the one originally built by the Central Pacific Railroad. This portion of the Transcontinental Railroad Grade is linked to the Golden Spike Historic Landmark and the Central Pacific Railroad Grade Historic District. - US NRHP