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Unknown Railroad Tunnel - National Parks Gallery

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Unknown Railroad Tunnel - National Parks Gallery

description

Summary

The process of building a tunnel in the 1870s was slow and difficult work. Holes were drilled into the layers of rock using a hand drill and hammer. Holes were then filled with powder and blasted in order to make the rock small enough to remove from the tunnel.

date_range

Date

1870 - 1879
place

Location

create

Source

National Parks Gallery
copyright

Copyright info

Public Domain Dedication

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