Image: CPRR Donner Summit Tunnel Hand Drilled Granite 1868
Size of this preview: 800 × 576 pixels. Other resolutions: 320 × 230 pixels | 810 × 583 pixels.
Original image (810 × 583 pixels, file size: 320 KB, MIME type: image/jpeg)
Description: Composite illustration of hand drilling marks on the granite walls inside of CPRR Tunnel #6 (the "Summit Tunnel") and a piece of granite removed from the tunnel after blasting with a drill mark. Both digital photographs and composite illustration by the uploader (Centpacrr). Drilled granite sample in uploader's collection, "The Cooper Collection of US Railroadiana".
Title: CPRR Donner Summit Tunnel Hand Drilled Granite 1868
Credit: Transferred from en.wikipedia to Commons.
Author: Centpacrr at English Wikipedia
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
Image usage
The following page links to this image:
All content from Kiddle encyclopedia articles (including the article images and facts) can be freely used under Attribution-ShareAlike license, unless stated otherwise.
