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File:CPRR Summit Tunnel Central Shaft.jpg

Summary

The vertical central shaft of the CPRR "Summit Tunnel" (Tunnel #6) at Donner Summit which allowed drilling and excavation of the tunnel to be carried out on four faces at once during construction of the 1,659 foot tunnel over a period of 15 months in 1866-67.

Original digital photograph taken by the uploader ( Centpacrr) inside the Summit Tunnel in August, 2003.

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Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
Width 699 px
Height 508 px
Bits per component
  • 8
  • 8
  • 8
Pixel composition RGB
Orientation Normal
Number of components 3
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
Software used Adobe Photoshop CS5 Macintosh
File change date and time 01:39, 18 March 2013
Exif version 2.21
Colour space Uncalibrated
Date and time of digitizing 21:38, 17 March 2013
Date metadata was last modified 21:39, 17 March 2013
Unique ID of original document xmp.did:0280117407206811B1A4CA94EEFE6FDB

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