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3/10/2025
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Pictures of UP 4-6-6-4's in them
 
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Title: 
Description: 
Photo Date:  4/1/1955  Upload Date: 7/5/2011 3:07:49 PM
Location:  Greene, UT
Author:  scan of postcard/Paul Gribble originals
Categories:  Roster,Scenic,Track,Action
Locomotives:  UP 3555(2-8-8-0) UP 3121(4-6-6-4)
Views:  3712   Comments: 3
UP 4-6-6-4 #3707
Title:  UP 4-6-6-4 #3707
Description:  Beautiful action shot of Union Pacific 4-6-6-4 #3707. History -Alco-Schenectady, 9/1936, serial #68752 nee-3907, > in 1944 #3807 as an oil burner > in 1949 #3707 as a coal burner > in 1950 #3807 as an oil burner again. The loco was finally retired in August of 1957. Specs - 69" drivers, impressive 255 psi boiler pressure, four 21x32" cylinders, massive engine weight of 566,000 lb, and massive tractive effort of 97,300 lb. Retired in 1950 Arthur Stensvad photo.
Photo Date:  5/6/1954  Upload Date: 2/26/2025 5:57:10 PM
Location:  Ogallala, NE
Author:  Gary Everhart
Categories:  Roster,Steam,Action
Locomotives:  UP 3707(4-6-6-4)
Views:  19   Comments: 0
Union Pacific 4-6-6-4 3717
Title:  Union Pacific 4-6-6-4 3717
Description:  Taken sometime during the mid-1950s, 4-6-6-4 3717 was photographed somewhere out on the UP, possibly in Cheyenne. 3717 was built by ALCo in June 1943 as UP 3984. It would be renumbered to 3717 in 1952. 3717 was retired in October 1959.
Photo Date:  1/1/1956  Upload Date: 10/9/2023 6:13:10 PM
Location:  Unknown, WY
Author:  Unknown
Categories: 
Locomotives:  UP 3717(4-6-6-4)
Views:  163   Comments: 0
UP 3800 Light Challenger
Title:  UP 3800 Light Challenger
Description:  Al Chione set
Photo Date:  1/22/1954  Upload Date: 2/17/2024 12:20:43 PM
Location:  Sherman Hill, WY
Author:  Al Chione
Categories:  Winter,Steam,Action
Locomotives:  UP 3800(4-6-6-4)
Views:  193   Comments: 1
UP 4-6-6-4 #3801 - Union Pacific
Title:  UP 4-6-6-4 #3801 - Union Pacific
Description:  A nice 1971 reprint of a 1936 Alco built Challenger type locomotive. Originally it was numbered 3901 but renumbered to 3801 in 1944.The unit was converted to an oil burner and then coal burner several times before reaching retirment between 1956-61. Specifics - class CSA-1, 69" drivers, impressive 255 psi boiler pressure, 22x32" cylinders (4), massive engine weight of 566,950 lb, impressive tractive effort of 97,305 lb. No photographer listed.
Photo Date:  5/1/1955  Upload Date: 3/4/2015 11:00:03 PM
Location:  Cheyenne, WY
Author:  Gary Everhart
Categories:  Roster,Yard,Steam
Locomotives:  UP 3801(4-6-6-4)
Views:  1705   Comments: 0
UP 3803
Title:  UP 3803
Description: 
Photo Date:  8/31/1955  Upload Date: 8/12/2015 7:50:20 PM
Location:  Archer Hill, WY
Author:  Unknown
Categories:  Steam
Locomotives:  UP 3803(4-6-6-4)
Views:  1186   Comments: 0
UP 4-6-6-4 Class CSA-1 3803
Title:  UP 4-6-6-4 Class CSA-1 3803
Description:  Union Pacific Railroad 4-6-6-4 Challenger Class CSA-1 3803 at North Platte, Nebraska on September 15, 1957, Kodachrome by Dick Rumbolz, Chuck Zeiler collection. Number 3803 was built by Alco in September 1936 as UP 3903 (c/n 68748), converted to burn oil and renumbered to 3803 in April 1944, retired May 1959. Cabside Class: CSA-69
Photo Date:  9/15/1957  Upload Date: 8/18/2013 5:26:23 PM
Location:  North Platte, NE
Author:  Dick Rumbolz
Categories:  Steam
Locomotives:  UP 3803(4-6-6-4)
Views:  1572   Comments: 0
UP CSA-1 3812
Title:  UP CSA-1 3812
Description:  Union Pacific Railroad CSA-1 3812 (Cabside Class CSA-69) at Council Bluffs, Iowa on an unknown day in April 1957, Kodachrome by Dick Rumbolz, Chuck Zeiler collection. According to utahrails.net, this locomotive was built as 3912 in September 1936 (c/n 68757), renumbered to 3812 in 1944, off the roster in December 1958.
Photo Date:  4/1/1957  Upload Date: 8/27/2013 11:00:15 AM
Location:  Council Bluffs, IA
Author:  Dick Rumbolz
Categories:  Steam
Locomotives:  UP 3812(4-6-6-4)
Views:  3211   Comments: 1
UP CSA-2 3815
Title:  UP CSA-2 3815
Description:  Union Pacific Railroad 4-6-6-4 Light Challenger Class CSA-2 (cabside class CSA-69) 3815 at North Platte, Nebraska on September 18, 1957, Kodachrome by Dick Rumbolz, Chuck Zeiler collection. Number 3815 was built in August 1937 as 3915 (c/n 68924), renumbered to 3815 in April 1944, off the roster in December 1958.
Photo Date:  9/18/1957  Upload Date: 8/27/2013 12:27:39 PM
Location:  North Platte, NE
Author:  Dick Rumbolz
Categories:  Steam
Locomotives:  UP 3815(4-6-6-4)
Views:  1057   Comments: 2
UP 4-6-6-4 Class CSA-2 3827
Title:  UP 4-6-6-4 Class CSA-2 3827
Description:  Union Pacific Railroad 4-6-6-4 Class CSA-2 (Challenger Simple Articulated) 3827 at Grand Island, Nebraska on an unknown day in October 1956, Kodachrome by Dick Rumbolz, Chuck Zeiler collection. Number 3827 was built by Alco-Schenectady in August 1937 (c/n 68936) as number 3927, converted to burn oil and renumbered to 3827 in April 1944, retired in December 1958.
Photo Date:  10/1/1956  Upload Date: 9/9/2013 12:14:37 PM
Location:  Grand Island, NE
Author:  Dick Rumbolz
Categories:  Steam
Locomotives:  UP 3827(4-6-6-4)
Views:  2099   Comments: 1
Union Pacific 4-6-6-4 3830
Title:  Union Pacific 4-6-6-4 3830
Description: 
Photo Date:  3/18/1956  Upload Date: 12/4/2022 10:26:12 PM
Location:  North Platte, NE
Author:  Noel Weaver, Jr.
Categories: 
Locomotives:  UP 3830(4-6-6-4)
Views:  248   Comments: 0
UP 3835 New to the site.
Title:  UP 3835 New to the site.
Description:  Date and location unknown.
Photo Date:  5/15/1950  Upload Date: 2/19/2013 2:42:43 PM
Location:  Unknown, US
Author:  Wendy Crim
Categories: 
Locomotives:  UP 3835(4-6-6-4)
Views:  1240   Comments: 6
UP 4-6-6-4 #3835
Title:  UP 4-6-6-4 #3835
Description:  This is one monster steam locomotive with power for the Great Plains. History -Alco-Schenectady, 8/1937 serial #68944 nee-3935 but renumbered in April of 1944 to 3835. The loco was retired in November of 1956. Specs - 49" drivers, 255 psi biler pressure, four 22x32" cylinders, engine weight of 582,000 lb and impressive tractive effort of 97,300 lb. Arthur Stensvad photo.
Photo Date:  7/26/1954  Upload Date: 2/26/2025 5:57:11 PM
Location:  North Platte, NE
Author:  Gary Everhart
Categories:  Roster,Steam,Action
Locomotives:  UP 3835(4-6-6-4)
Views:  21   Comments: 0
UP 3902 info
Title:  UP 3902 info
Description: 
Photo Date:  8/1/1936  Upload Date: 7/10/2022 5:33:49 PM
Location:  Omaha, NE
Author:  Richard Flebbe
Categories: 
Locomotives:  UP 3902(4-6-6-4)
Views:  217   Comments: 0
UP 3902
Title:  UP 3902
Description:  Union Pacific 4-6-6-4 class CSA-1 number 3902, likely pictured at Schenectady, New York. This locomotive was built by Alco-Schectady in September 1936 (c/n 68747) as a coal burner numbered 3902, converted by the UP to burn oil around April 1944 and renumbered to 3802, converted back to burn coal in 1949 and renumbered to 3702, converted back to burn oil in 1950 and renumbered back to 3802, retired in December 1958.
Photo Date:  8/1/1936  Upload Date: 7/10/2022 5:33:51 PM
Location:  Schenectady, NY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3902(4-6-6-4)
Views:  336   Comments: 0
UP 3905
Title:  UP 3905
Description: 
Photo Date:  4/17/1942  Upload Date: 7/4/2022 5:26:17 PM
Location:  Cheyenne, WY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3905(4-6-6-4)
Views:  226   Comments: 0
UP 3905
Title:  UP 3905
Description: 
Photo Date:  4/17/1942  Upload Date: 7/4/2022 5:26:19 PM
Location:  Cheyenne, WY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3905(4-6-6-4)
Views:  205   Comments: 0
UP 3911
Title:  UP 3911
Description:  Union Pacific 4-6-6-4 class CSA-1 number 3911 was built by Alco-Schenectady in September 1936 (c/n 68756) as a coal burner, converted by the UP to burn oil around April 1944 and renumbered to 3811, converted back to burn coal in 1949 and renumbered to 3711, converted back to burn oil in 1950 and renumbered back to 3811, retired in September 1956.
Photo Date:  2/16/1940  Upload Date: 7/4/2022 5:26:20 PM
Location:  Cheyenne, WY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3911(4-6-6-4)
Views:  249   Comments: 0
Union Pacific 4-6-6-4 3919
Title:  Union Pacific 4-6-6-4 3919
Description:  Brand new and heading west from New York to Omaha.
Photo Date:  6/14/1937  Upload Date: 12/4/2022 10:27:07 PM
Location:  Binghamton, NY
Author:  H. L. Tilton
Categories: 
Locomotives:  UP 3919(4-6-6-4)
Views:  312   Comments: 1
UP 4-6-6-4 #3931 - Union Pacific Challenger
Title:  UP 4-6-6-4 #3931 - Union Pacific Challenger
Description:  Beautiful original photo of the 1937 Alco built Challenger just recently delivered to Union Pacific when this photo was taken by an unknown photographer. Specifics - class CSA-2, 69" drivers, impressive 255 psi boiler pressure, 22x32" cylinders (4), massive engine weight of 566,950 lb, impressive tractive effort of 97,305 lb. Union Pacific eventually had 105 4-6-6-4 Challengers on their roster before falling to the diesel revolution. This locomotive was converted to burn oil in 1944, renumbered to 3831, retired in June 1957.
Photo Date:  8/1/1937  Upload Date: 3/4/2015 10:10:40 PM
Location:  Topeka, KS
Author:  Gary Everhart
Categories:  Roster,Yard,Steam,Action
Locomotives:  UP 3931(4-6-6-4)
Views:  1149   Comments: 0
Union Pacific 4-6-6-4 3932
Title:  Union Pacific 4-6-6-4 3932
Description: 
Photo Date:  9/6/1937  Upload Date: 12/4/2022 10:29:01 PM
Location:  Kansas City, KS
Author:  William Bissinger
Categories: 
Locomotives:  UP 3932(4-6-6-4)
Views:  1085   Comments: 0
UP 3938 info
Title:  UP 3938 info
Description: 
Photo Date:  8/1/1937  Upload Date: 7/10/2022 5:33:52 PM
Location:  Omaha, NE
Author:  Richard Flebbe
Categories: 
Locomotives:  UP 3938(4-6-6-4)
Views:  202   Comments: 0
UP 3938
Title:  UP 3938
Description:  Union Pacific 4-6-6-4 class CSA-2 number 3938, likely pictured at Schenectady, New York. This locomotive was built by Alco-Schenectady in August 1937 (c/n 68947) as a coal burner, converted by the UP to burn oil around April 1944 and renumbered to 3838, retired in May 1959.
Photo Date:  8/1/1937  Upload Date: 7/10/2022 5:33:54 PM
Location:  Schenectady, NY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3938(4-6-6-4)
Views:  304   Comments: 0
UP 4-6-6-4 #3939
Title:  UP 4-6-6-4 #3939
Description:  Sadly, this montster steam locomotive was caught sitting in the scrap line at Cheyenne, WY. History - Alco-Schenectady, 8.1944, serial #72801, After almost 15 years of service, the loco was"vacated" in June of 1959. The date of the photo shows it in a storage/scrap line.Specs - 69" drivers, impressive 280psi boiler pressure, four 21x32" cylinders, engine weight of 634,500 lb and tractive effort of 97,350 lb. The photo was taken by an unknown photographer.
Photo Date:  10/2/1957  Upload Date: 2/26/2025 5:57:12 PM
Location:  Cheyenne, WY
Author:  Gary Everhart
Categories:  Roster,Steam,Action
Locomotives:  UP 3939(4-6-6-4)
Views:  23   Comments: 0
Union Pacific 4-6-6-4 3940
Title:  Union Pacific 4-6-6-4 3940
Description:  Taken by an unknown photographer.
Photo Date:  8/18/1957  Upload Date: 12/4/2022 10:30:04 PM
Location:  Cheyenne, WY
Author:  Unknown
Categories: 
Locomotives:  UP 3940(4-6-6-4)
Views:  221   Comments: 0
UP 3941
Title:  UP 3941
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/4/2022 5:26:21 PM
Location:  Cheyenne, WY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3941(4-6-6-4)
Views:  316   Comments: 0
UP 3941
Title:  UP 3941
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:19 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3941(4-6-6-4)
Views:  220   Comments: 0
UP 3941 (4-6-6-4) and UP 4024 (4-8-8-4)
Title:  UP 3941 (4-6-6-4) and UP 4024 (4-8-8-4)
Description:  Collection of Mario Stefani
Photo Date:  5/14/1953  Upload Date: 8/10/2012 10:35:05 AM
Location:  Borie, WY
Author:  unknown
Categories:  Roster,Model,Steam,Action
Locomotives:  UP 3941(4-6-6-4) UP 4024(4-8-8-4)
Views:  3733   Comments: 2
UP 3949
Title:  UP 3949
Description: 
Photo Date:  8/1/1944  Upload Date: 7/10/2022 5:33:58 PM
Location:  Schenectady, NY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3949(4-6-6-4)
Views:  298   Comments: 0
UP 3949 info
Title:  UP 3949 info
Description: 
Photo Date:  10/1/1944  Upload Date: 7/10/2022 5:33:56 PM
Location:  Omaha, NE
Author:  Richard Flebbe
Categories: 
Locomotives:  UP 3949(4-6-6-4)
Views:  202   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:22 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  208   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:25 PM
Location:  Unknown, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  179   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:32 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  198   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:35 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  196   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:39 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  181   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:41 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  179   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:44 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  156   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/10/2022 4:51:47 PM
Location:  North Platte, NE
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  173   Comments: 0
UP 3950 Cab Interior
Title:  UP 3950 Cab Interior
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/4/2022 5:34:32 PM
Location:  Omaha, NE
Author:  Richard Flebbe
Categories:  InCab,Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  156   Comments: 0
UP 3950 Cab Interior
Title:  UP 3950 Cab Interior
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/4/2022 5:34:52 PM
Location:  Omaha, NE
Author:  Richard Flebbe
Categories:  InCab,Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  133   Comments: 0
UP 3950 Cab Interior
Title:  UP 3950 Cab Interior
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/4/2022 5:34:57 PM
Location:  Omaha, NE
Author:  Richard Flebbe
Categories:  InCab,Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  191   Comments: 0
UP 3950 Cab Interior
Title:  UP 3950 Cab Interior
Description:  estimated date 1940 - 1950
Photo Date:  1/1/1945  Upload Date: 7/4/2022 5:35:02 PM
Location:  Omaha, NE
Author:  Richard Flebbe
Categories:  InCab,Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  179   Comments: 0
UP 3950
Title:  UP 3950
Description:  estimated date 1940 - 1950
Photo Date:  7/4/2022  Upload Date: 7/10/2022 4:51:28 PM
Location:  Unknown, WY
Author:  Richard Flebbe
Categories:  Steam
Locomotives:  UP 3950(4-6-6-4)
Views:  163   Comments: 0
Union Pacific 4-6-6-4 3951
Title:  Union Pacific 4-6-6-4 3951
Description:  Taken during the late 1950s by an unknown photographer.
Photo Date:  1/1/1958  Upload Date: 12/4/2022 10:31:02 PM
Location:  Unknown, WI
Author:  Unknown
Categories: 
Locomotives:  UP 3951(4-6-6-4)
Views:  201   Comments: 0
UP 3953
Title:  UP 3953
Description: 
Photo Date:  8/30/1955  Upload Date: 8/12/2015 7:52:20 PM
Location:  Red Desert, WY
Author:  Unknown
Categories:  Steam
Locomotives:  UP 3953(4-6-6-4)
Views:  901   Comments: 0
UP 3659
Title:  UP 3659
Description: 
Photo Date:  1/1/1940  Upload Date: 10/30/2016 6:25:48 PM
Location:  Laramie, WY
Author:  Matt Petersen
Categories: 
Locomotives:  UP 3659(2-8-8-0) UP 2906(4-6-2) UP 3956(4-6-6-4)
Views:  1454   Comments: 0
UP 3959
Title:  UP 3959
Description:  Randy Curlin Collection
Photo Date:  9/2/1957  Upload Date: 2/5/2025 11:43:19 AM
Location:  Durham, WY
Author:  Randy Curlin Collection
Categories:  Steam,Signal,Action
Locomotives:  UP 3959(4-6-6-4)
Views:  78   Comments: 2
UP 3963
Title:  UP 3963
Description:  Union Pacific Railroad 3963 at Cheyenne, Wyominf on an unknown day in October 1957, Kodachrome by Dick Rumbolz, Chuck Zeiler colletion. Number 3963 was built by Alco in May 1942 (c/n 69773) and listed as retored in October 1959, although it appears if the date on the slide mount is correct, it may have been retired earlier.
Photo Date:  10/1/1957  Upload Date: 10/1/2013 12:20:28 PM
Location:  Cheyenne, WY
Author:  Dick Rumbolz
Categories:  Steam
Locomotives:  UP 3963(4-6-6-4)
Views:  1405   Comments: 0
UP #3965
Title:  UP #3965
Description:  Retired Challenger, which was vacated from the roster in July 1960. Scanned with an Epson V550 from a 35mm slide, brand is unknown. Exact date is approximate.
Photo Date:  7/1/1960  Upload Date: 8/7/2016 9:18:57 PM
Location:  Council Bluffs, IA
Author:  Unknown/Paul Frantz Collection
Categories:  Roster,Steam
Locomotives:  UP 3965(4-6-6-4)
Views:  1364   Comments: 0

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