Nostalgia & History > Railroad Construction Crew (date unknown)

I found picture 1 on the website,
 
http://www.slideshare.net/blaineas/railroad
 
“The ‘iron horse’ had its beginning in Plaquemine, [Louisiana] when the first train arrived on June 15, 1881,  Although freight trains continue their tradition of transporting merchandise, the era of the passenger train in Plaquemine ended on December 17, 1969, when trains No. 21 and 22 between New Orleans and Marshal, Texas passed through Plaquemine.” 
 
Picture 1, “Railroad construction crew (date unknown). 
 

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In an effort to find out more information about picture 1 I did a Google photo recognition search. 
 
There were four pages that include matching images but they were all to the original website.  The search made the best guess for this image as family.   I changed this to railroad and got numerous visually similar images. 
 
Picture 2, “The transcontinental railroad's construction touched the lives of hundreds of thousands of people.”  “Union Pacific rolling mill workers in Wyoming.” 
 
http://www.pbs.org/wgbh/americanexperience/features/photo-gallery/tcrr-gallery

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Picture 3, “Railroad workmen.”
 
http://tennesseeoverhill.com/old-line-railroad-2 [I could not find picture 3 on this website.] 
 

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Picture 4, “U.S. and Mexican railroad bridge guards.  U.S. Army soldiers from Fort Brown on guard duty on a railroad bridge between Brownsville, Texas and Matamoros, Mexico, pose with their Mexican counterparts.  circa 1916.”
 
https://www.flickr.com/photos/briscoe_center/6079696289/in/photostream
 

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I found picture 5 on the internet.
 
https://commons.wikimedia.org/wiki/File:Mallet_compound_locomotive_Southern_Pacific_Railroad_1910.JPG
 
Picture 5, “Mallet compound locomotive Southern Pacific Railroad 1910.” 
 

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