Crossing a trestle during leveling operations. A dangerous proposition as there was no place to put the speeders if an unexpected train happened by.

Image ID: cgs01674, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: California, Southern
Photo Date: 1920
Photographer: Harry Siple, USC&GS
Credit: Mary Wood, Daughter of Harry Siple

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