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11/7/2025
 
 
 
 
 
Owner: Union Pacific Railroad Company
Model:Alco 4-8-8-4Built As:UP 4005 (4-8-8-4)
Serial Number:69576Order No:S-1844
Frame Number:23¾X32 cylinders, 68" driversBuilt:8/1941
Notes:donated 06/1970 to Forney Museum, Denver, CO
Other locos with this serial:  UP 4005(4-8-8-4)
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Eastbound Nears Hermosa
Title:  Eastbound Nears Hermosa
Description:  n around 1950, 4005 leads an eastbound extra towards Hermosa Tunnel past a semaphore signal. The signals would be retired by 1953, the Big Boy would follow them into retirement in just 9 years. Obtained from Union Pacific Steam: Big Boy Portraits (Bush, Ehernberger)
Photo Date:  1/1/1950  Upload Date: 10/3/2022 12:03:42 AM
Location:  Hermosa, WY
Author:  J.H.Conant
Categories:  Steam,Action
Locomotives:  UP 4005(4-8-8-4)
Views:  230   Comments: 0
UP 4005
Title:  UP 4005
Description:  Big Boy 4005 thunders out of Green River with an 80 car train. The eastbound extra is mostly made up of loaded reefers returning to eastern markets. Obtained from Union Pacific Steam: Big Boy Portraits (Bush, Ehernberger)
Photo Date:  4/29/1950  Upload Date: 7/1/2022 1:18:38 AM
Location:  Green River, WY
Author:  H.R. Griffiths
Categories:  Scenic,Steam,Action
Locomotives:  UP 4005(4-8-8-4)
Views:  307   Comments: 0
Topped Off And Ready For Service
Title:  Topped Off And Ready For Service
Description:  4005 rests in the engine terminal at Cheyenne. The Big Boy has just topped off on coal, and will have its tender filled with water for another westbound journey. The tender of each Big Boy was a behemoth of its own. Each one measured just over 47 feet long, and had a capacity for 56,000 pounds of coal and 24,000 gallons of water. A stoker engine and mechanical lubrication system were also located in the tender, directly behind the cab under the coal bunker. Despite this massive size, stops would still have to be made to complete the arduous journey over the Wasatch range. Obtained from Union Pacific Steam: Big Boy Portraits (Bush, Ehernberger)
Photo Date:  5/28/1950  Upload Date: 7/8/2022 12:32:13 AM
Location:  Cheyenne, WY
Author:  F.G.Gschwind
Categories:  Yard,Steam
Locomotives:  UP 4005(4-8-8-4)
Views:  285   Comments: 0
UP 4000s in Cheyenne
Title:  UP 4000s in Cheyenne
Description:  UP 4001 and 4005 sit in the yard at Cheyenne on June 26, 1952. 4001 was built in 1941, was scrapped in 1961, and is new to RRPA. Obtained from Union Pacific Steam: Big Boy Portraits (Bush, Ehernberger)
Photo Date:  6/26/1952  Upload Date: 5/12/2021 8:36:52 PM
Location:  Cheyenne, WY
Author:  H.R Griffiths
Categories:  Roster,Yard,Steam,Track
Locomotives:  UP 4001(4-8-8-4) UP 4005(4-8-8-4)
Views:  694   Comments: 0
Light Engine 4005
Title:  Light Engine 4005
Description:  In mid-November 1956, 4005 trundles through the yard in Laramie. The coaling tower looms over the cab of the engine. This tower, along with most of the other engine faclities in Laramie, is long gone today. 4005, however, would survive the end of steam on the UP. The unit was stored as of November 30, 1958, and was marked as unserviceable in 1960. Ten years would pass before the engine would donated to the Forney Museum in Denver, Colorado in 1970. Obtained from Union Pacific Steam: Big Boy Portraits (Bush, Ehernberger)
Photo Date:  11/11/1956  Upload Date: 7/3/2022 2:04:35 AM
Location:  Laramie, WY
Author:  Stan Kistler
Categories:  Roster,Yard,Steam,Action
Locomotives:  UP 4005(4-8-8-4)
Views:  227   Comments: 0
4005 Visits Its Future Home
Title:  4005 Visits Its Future Home
Description:  UP 4005 pays a visit to the Denver yard in January, 1957. 13 years later, 4005 will be donated to the Forney Museum in Denver, where it resides today. Obtained from Union Pacific Steam: Big Boy Portraits (Bush, Ehernberger)
Photo Date:  1/12/1957  Upload Date: 5/31/2021 1:02:57 PM
Location:  Denver, CO
Author:  Dave Gross
Categories:  Bridge,Yard,Steam,Track
Locomotives:  UP 4005(4-8-8-4)
Views:  450   Comments: 0
UP 4005
Title:  UP 4005
Description:  Unknown Location, or date. possibly denver transportation museum.
Photo Date:  1/1/2000  Upload Date: 9/4/2009 12:46:05 AM
Location:  Denver, CO
Author:  Adam Lutt
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  2480   Comments: 0
UP 4005
Title:  UP 4005
Description: 
Photo Date:  1/1/2004  Upload Date: 12/13/2012 8:18:32 AM
Location:  Denver, CO
Author:  Wil Hata
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  1271   Comments: 0
UP Bdg Boy
Title:  UP Bdg Boy
Description:  This makes two Big Boy's in one day. After leaving Cheyenne, WY and haeding home we stopped at the Forney Museum in Denver to get the second one.
Photo Date:  6/3/2009  Upload Date: 6/7/2009 9:02:13 PM
Location:  Denver, CO
Author:  amtrakswchief 4
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  1056   Comments: 0
Displayed Big Boy - UP 4005
Title:  Displayed Big Boy - UP 4005
Description:  Here we see our 2nd Big Boy of the day, this one is displayed at the Forney Museum in Denver.
Photo Date:  6/3/2009  Upload Date: 6/10/2009 6:26:14 PM
Location:  Denver, CO
Author:  Zach Pumphery
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  1258   Comments: 1
Displayed Big Boy - UP 4005
Title:  Displayed Big Boy - UP 4005
Description:  Inside the Forney Museum we see the 2nd Big Boy of the day. Thanks to the gentleman that let us in the building after hours.
Photo Date:  6/3/2009  Upload Date: 6/10/2009 6:26:15 PM
Location:  Commerce City, CO
Author:  Zach Pumphery
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  1282   Comments: 0
UP 4005
Title:  UP 4005
Description:  Big Boy in all his glory.
Photo Date:  9/24/2010  Upload Date: 9/24/2010 5:42:16 PM
Location:  Cheyenne, WY
Author:  Darryl Hill
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  2260   Comments: 1
UP 4005
Title:  UP 4005
Description:  The story of Big Boy.
Photo Date:  9/24/2010  Upload Date: 9/24/2010 5:42:16 PM
Location:  Cheyenne, WY
Author:  Darryl Hill
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  1317   Comments: 0
UP 4005
Title:  UP 4005
Description:  Big Boy has menancing look about him.
Photo Date:  9/24/2010  Upload Date: 9/24/2010 5:42:15 PM
Location:  Cheyenne, WY
Author:  Darryl Hill
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  1490   Comments: 0
UP 4005 + 900099 both are Display
Title:  UP 4005 + 900099 both are Display
Description: 
Photo Date:  5/8/2014  Upload Date: 6/3/2014 12:20:36 AM
Location:  Denver, CO
Author:  Andrew Goblirsch
Categories:  Track
Locomotives:  UP 4005(4-8-8-4)
Views:  942   Comments: 0
UP 4005, 900099 + C&NW 444 With My Mom
Title:  UP 4005, 900099 + C&NW 444 With My Mom
Description: 
Photo Date:  5/8/2014  Upload Date: 5/19/2014 12:27:35 AM
Location:  Denver, CO
Author:  Andrew Goblirsch
Categories:  Track
Locomotives:  UP 4005(4-8-8-4) CNW 444(4-6-0)
Views:  1335   Comments: 0
UP Big Boy 4005 Cab & Me
Title:  UP Big Boy 4005 Cab & Me
Description: 
Photo Date:  5/8/2014  Upload Date: 4/8/2015 8:21:52 PM
Location:  Denver, CO
Author:  Andrew Goblirsch
Categories:  Track
Locomotives:  UP 4005(4-8-8-4)
Views:  1054   Comments: 0
Big Boy 4005
Title:  Big Boy 4005
Description:  At uhe Forney Transportation Museum in Denver, CO.
Photo Date:  7/17/2014  Upload Date: 8/8/2014 12:40:34 AM
Location:  Denver, CO
Author:  Tom Redlion Walsh
Categories:  Roster,Steam
Locomotives:  UP 4005(4-8-8-4)
Views:  913   Comments: 0
UP 4005
Title:  UP 4005
Description: 
Photo Date:  7/26/2014  Upload Date: 12/9/2018 3:42:48 PM
Location:  Denver, CO
Author:  Wil Hata
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  771   Comments: 0
UP 4005 & UP 900099
Title:  UP 4005 & UP 900099
Description: 
Photo Date:  6/25/2015  Upload Date: 5/8/2019 5:13:34 PM
Location:  Denver, CO
Author:  Nicholas Katz
Categories:  RollingStock,Yard,Station,Steam,Passenger,Track,Action
Locomotives:  UP 4005(4-8-8-4)
Views:  786   Comments: 0
UP 4005 Cab
Title:  UP 4005 Cab
Description: 
Photo Date:  6/25/2015  Upload Date: 5/8/2019 5:18:52 PM
Location:  Denver, CO
Author:  Nicholas Katz
Categories:  Roster,RollingStock,InCab,Yard,Station,Steam,Passenger,Track,Action
Locomotives:  UP 4005(4-8-8-4)
Views:  905   Comments: 0
UP 4005
Title:  UP 4005
Description:  On display at the Forney Museum.
Photo Date:  6/25/2015  Upload Date: 8/12/2016 7:14:51 PM
Location:  Denver, CO
Author:  Nicholas Katz
Categories:  Roster,RollingStock,Steam,Track
Locomotives:  UP 4005(4-8-8-4)
Views:  849   Comments: 0
UP 4005
Title:  UP 4005
Description: 
Photo Date:  4/20/2018  Upload Date: 4/26/2018 6:01:57 PM
Location:  Denver, CO
Author:  Ashley Rodriguez
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  1209   Comments: 0
UP 4005 Tender
Title:  UP 4005 Tender
Description: 
Photo Date:  6/19/2021  Upload Date: 6/19/2021 9:43:29 PM
Location:  Denver, CO
Author:  Wil Hata
Categories: 
Locomotives:  UP 4005(4-8-8-4)
Views:  695   Comments: 0


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