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File:CPRR Donner Summit Tunnel Hand Drilled Granite 1868.jpg

Summary

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".

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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.
JPEG file comment AppleMark

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