National Museum of Transportation near Kirkwood in St. Louis County, Missouri — The American Midwest (Upper Plains)

Union Pacific "Big Boy" #4006

— Cab Open for Display —

Photographed by Devry Becker Jones (CC0), April 22, 2019

1. Union Pacific "Big Boy" #4006 Marker

Inscription. Built in 1941 by the American Locomotive Company at a cost of $265,000.00 number 4006 is one of 25 "big boys," the largest successful steam locomotives ever built, with a total weight over 600 tons. It is 132'9 1/4" long, carries 33 tons of coal and 25,000 gallons of water in its tender. It is a 4-8-8-4 (simple) articulated locomotive.

Erected by Museum of Transportation.

Topics. This historical marker is listed in this topic list: Railroads & Streetcars. A significant historical year for this entry is 1941.

Location. 38° 34.325′ N, 90° 27.674′ W. Marker is near Kirkwood, Missouri, in St. Louis County. It is in National Museum of Transportation. It can be reached from Barrett Station Road east of Old Dougherty Ferry Road, on the right when traveling east. Touch for map. Marker is at or near this postal address: 3015 Barrett Station Road, Saint Louis MO 63122, United States of America. Touch for directions.

Regionally, this marker is in Greater St. Louis.

It is also in the American Midwest,

in the Lewis & Clark Corridor,

in the Corn Belt,

and in the Great River Road Region.

Globally, it is in North America,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once the Viceroyalty of New France,

the territory of the Mississippian Culture,

the Louisiana Purchase,

and the Antebellum South.

Other nearby markers. At least 8 other markers are within walking distance of this marker: Union Pacific #6944 (a few steps from this marker); Atchison, Topeka & Santa Fe #5011 (a few steps from this marker); Union Pacific #900081 (a few steps from this marker); Chesapeake & Ohio #2727 (within shouting distance of this marker); General Motors #103 (within shouting distance

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of this marker); Boston & Providence "Daniel Nason" (within shouting distance of this marker); SBIX #1634 (within shouting distance of this marker); Illinois Terminal Neon Sign (within shouting distance of this marker). Touch for a list and map of all markers in Kirkwood.

Union Pacific "Big Boy" #4006 and Marker image. Click for full size.

Photographed by Devry Becker Jones (CC0), April 22, 2019

2. Union Pacific "Big Boy" #4006 and Marker

Credits. This page was last revised on June 1, 2026. It was originally submitted on April 28, 2019, by Devry Becker Jones of Washington, District of Columbia. This page has been viewed 286 times since then and 16 times this year. Photos: 1, 2. submitted on April 28, 2019, by Devry Becker Jones of Washington, District of Columbia.