UP - Tunnel 23
West Portal Of Tunnel 23, Contextual View To North-Northeast, 135mm Lens. Camera Position Is Approximately Centerline Of Original Central Pacific Transcontinental Line, And Bypassed Tunnel '0' (1873) (Haer Ca-199) Is Hidden Behind Vegetation At Cente
Photo taken by Ed Anderson for the Historic American Engineering Record
View photos at Library of Congress
BH Photo #299134
The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 1863 and 1869, where it joined the Union Pacific Railroad which had built west from Omaha. For the purpose of the current project, the first transcontinental railroad was found likely to be eligible for the National Register of Historic Places at the national level of significance under Criterion A for its significance in transportation history, in uniting the East and the West, and in the development of the West. The railroad's period of significance is 1869 to 1945, from the line's completion in 1869, through the years of its role in the settlement and development of the West, to the conclusion of the railroad's achievements in World War II. Built in 1909, Tunnel 23 is a contributive element of this historic property.
Tunnel 23 is an 843-foot, single track railroad tunnel, with granite ashlar portal faces and wingwalls. As-built, the tunnel was concrete-lined for the first fifty feet in from each portal, with the remainder lined in redwood timber; the railroad has subsequently covered the timbering with shotcrete. The tunnel is on a tangent (no curves) alignment, and carries the tracks of the Union Pacific Railroad's (formerly Southern Pacific) Donner Pass line.
-- Historic American Engineering Record
- October 9, 2014: Added by Dave King
- Dave King - DKinghawkfan [at] hotmail [dot] com
- HAER CA-198 - Central Pacific Transcontinental Railroad, Tunnel No. 23, Milepost 132.69, Applegate, Placer County, CA