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Union Pacific Steam Locomotives, 1915-1962

Part 13, UP 3500 to UP 3599

This page was last updated on October 30, 2014.

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UP 2-8-8-0 -- 15 locomotives (simple; converted from compound)

UP
Number
First
Number
Date To
3500 Series
Builder Builder
Number
Date
Built
Fuel Date
Vacated
UP 3500 (2nd) UP 3600 (2nd) Oct 1943 Schenectady 58262 May 1918 Oil Mar 1954
UP 3501 (2nd) UP 3601 (2nd) Jul 1944 Schenectady 58263 May 1918 Oil Mar 1954
UP 3502 (2nd) UP 3602 (2nd) Sep 1942 Schenectady 58264 May 1918 Oil Dec 1954
UP 3503 (2nd) UP 3603 Oct 1943 Schenectady 58265 May 1918 Oil Mar 1948
UP 3504 (2nd) UP 3604 Sep 1944 Schenectady 58266 May 1918 Oil Dec 1954
UP 3505 (2nd) UP 3605 May 1943 Schenectady 58267 May 1918 Oil Nov 1947
UP 3506 (2nd) UP 3606 Nov 1944 Schenectady 58268 May 1918 Oil Mar 1954
UP 3507 (2nd) UP 3607 Sep 1943 Schenectady 58269 May 1918 Oil May 1948
UP 3508 (2nd) UP 3608 Dec 1944 Schenectady 58270 May 1918 Oil Dec 1952
UP 3509 (2nd) UP 3609 Jul 1942 Schenectady 58271 May 1918 Oil Dec 1947
UP 3510 (2nd) UP 3610 Jul 1942 Schenectady 58272 May 1918 Oil Nov 1949
UP 3511 (2nd) UP 3611 Nov 1943 Schenectady 58273 May 1918 Oil Dec 1947
UP 3512 (2nd) UP 3612 Sep 1942 Schenectady 58274 May 1918 Coal Dec 1954
UP 3513 (2nd) UP 3613 Aug 1944 Schenectady 58275 May 1918 Oil Dec 1949
UP 3514 (2nd) UP 3614 Jan 1943 Schenectady 58276 May 1918 Oil Mar 1952

Description:

CS Class: SA-C-2
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1942-1944)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1942-1944)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: (see above)

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. Built as compound locomotives in 1918; rebuilt to simple locomotives in 1942-1944 (including changing drivers from 57 inches to 59 inches) and renumbered to UP 3500 series
c. UP 3600-3614 built as coal burners; five locomotives (UP 3601-3604, 3606, 3608, 3613) converted to oil burners after 1932 and before 1938
d. Oil burners converted back to coal burners in November 1947 through January 1948; assigned to coal branches in the Rock Springs, Wyoming area
   

UP 2-8-8-0 -- 19 locomotives (simple; converted from compound)

UP
Number
First
Number
Date To
3500 Series
Builder Builder
Number
Date
Built
Date
Vacated
UP 3515 UP 3615 Aug 1943 Brooks 61905 Jul 1920 May 1948
UP 3516 UP 3616 Aug 1942 Brooks 61906 Jul 1920 Nov 1949
UP 3517 UP 3617 Jun 1937 Brooks 61907 Jul 1920 Dec 1947
UP 3518 UP 3618 Sep 1937 Brooks 61908 Jul 1920 Dec 1954
UP 3519 UP 3619 May 1942 Brooks 61909 Jul 1920 Jun 1954
UP 3520 UP 3620 Jul 1937 Brooks 61910 Aug 1920 Dec 1954
UP 3521 UP 3621 Feb 1939 Brooks 61911 Aug 1920 Dec 1954
UP 3522 UP 3622 Nov 1937 Brooks 61912 Aug 1920 Feb 1952
UP 3523 UP 3623 Sep 1937 Brooks 61913 Aug 1920 Dec 1954
UP 3524 UP 3624 Aug 1937 Brooks 61914 Aug 1920 Jun 1954
UP 3525 UP 3625 Apr 1937 Brooks 61915 Aug 1920 Jul 1947
UP 3526 UP 3626 Mar 1938 Brooks 61916 Aug 1920 Dec 1949
UP 3527 UP 3627 Jun 1937 Brooks 61917 Aug 1920 Jun 1947
UP 3528 UP 3628 Nov 1937 Brooks 61918 Aug 1920 Dec 1954
UP 3529 UP 3629 May 1937 Brooks 61919 Aug 1920 Mar 1952
UP 3530 UP 3630 Aug 1937 Brooks 61920 Aug 1920 Mar 1954
UP 3531 UP 3631 Jun 1937 Brooks 61921 Aug 1920 Feb 1949
UP 3532 UP 3632 Jun 1937 Brooks 61922 Aug 1920 Dec 1949
UP 3533 UP 3633 Sep 1937 Brooks 61923 Sep 1920 Dec 1954

Description:

CS Class: SA-C-3
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1937-1943)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1937-1943)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Coal (later converted to Oil)

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. Built as compound locomotives in 1920; rebuilt to simple locomotives in 1937-1943 (including changing drivers from 57 inches to 59 inches) and renumbered to UP 3500 series
c. UP 3520-3529 (10 locomotives) were leased to OWRR&N in 1920
d. UP 3530-3533 (4 locomotives) were leased to OSL in 1920
e. UP 3620-3632 (13 locomotives) were converted from coal burners to oil burners before 1938
   

UP 2-8-8-0 -- 5 locomotives (simple; converted from compound)

UP
Number
First
Number
Date To
3500 Series
Builder Builder
Number
Date
Built
Fuel Date
Vacated
UP 3534 UP 3634 Aug 1943 Brooks 63771 Mar 1923 Coal Dec 1954
UP 3535 UP 3635 Jan 1942 Brooks 63772 Mar 1923 Oil Feb 1952
UP 3536 UP 3636 Jun 1937 Brooks 63773 Mar 1923 Oil Feb 1952
UP 3537 UP 3637 Nov 1937 Brooks 63774 Mar 1923 Oil Jan 1949
UP 3538 UP 3638 May 1937 Brooks 63775 Mar 1923 Oil Dec 1954

Description:

CS Class: SA-C-4
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1937-1943)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1937-1943)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: (see above)

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. Built as compound locomotives in 1923; rebuilt to simple locomotives in 1937-1943 (including changing drivers from 57 inches to 59 inches) and renumbered to UP 3500 series
c. Four locomotives (UP 3535-3538) were converted from coal burners to oil burners before July 1938
d. Oil burners converted to coal burners in November 1947 through January 1948; assigned to coal branches in the Rock Springs, Wyoming area
   

UP 2-8-8-0 -- 5 locomotives (simple; converted from compound)

UP
Number
First
Number
Date To
3500 Series
Builder Builder
Number
Date
Built
Fuel Date
Vacated
UP 3539 UP 3639 Jan 1938 Brooks 64402 Aug 1923 Oil Feb 1952
UP 3540 UP 3640 Sep 1942 Brooks 64403 Aug 1923 Coal Dec 1954
UP 3541 UP 3641 Mar 1942 Brooks 64404 Aug 1923 Oil Feb 1954
UP 3542 UP 3642 Aug 1937 Brooks 64405 Aug 1923 Oil Apr 1952
UP 3543 UP 3643 Aug 1943 Brooks 64406 Aug 1923 Oil Mar 1954

Description:

CS Class: SA-C-5
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1937-1943)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1937-1943)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: (see above)

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. Built as compound locomotives in 1923; rebuilt to simple locomotives in 1937-1943 (including changing drivers from 57 inches to 59 inches) and renumbered to UP 3500 series
c. UP 3642 was equipped with a tender traction booster removed from an OWRR&N 9700 class 4-12-2
d. All five locomtives converted from coal burners to oil burners before 1938
e. UP 3540 was converted from an oil burner to a coal burner in November 1947 through January 1948; assigned to coal branches in the Rock Springs, Wyoming area
   

UP 2-8-8-0 -- 1 locomotive (simple, converted from compound)

1942 UP
Number
First
Number
Second
Number
Date To
UP 3544
Builder Builder
Number
Date
Built
Date
Vacated
UP 3544 OSL 3703 (1st) UP 3644 Apr 1942 Schenectady 58277 May 1918 Feb 1954

Description:

CS Class: SA-C-2
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1942)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1942)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Coal, converted to oil, converted back to coal

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. UP 3544 was built as OSL 3703 in 1918; to UP 3644 in 1923; converted to simple and renumbered to UP 3544 in 1942; vacated in 1954
c. Built as coal burner (as OSL 3703, as UP 3644, and as UP 3544); converted to oil burner in 1943-1945; converted to coal burner in November 1947 to January 1948 and assigned to Rock Springs coal runs.
   

UP 2-8-8-0 -- 20 locomotives (simple; converted from compound)

UP
Number
First
Number
Date To
3500 Series
Builder Builder
Number
Date
Built
Date
Vacated
UP 3545 UP 3645 May 1937 Brooks 65665 Jun 1924 Jul 1950
UP 3546 UP 3646 Dec 1943 Brooks 65666 Jun 1924 Dec 1949
UP 3547 UP 3647 Jun 1937 Brooks 65667 Jun 1924 Apr 1948
UP 3548 UP 3648 Aug 1937 Brooks 65668 Jun 1924 Nov 1949
UP 3549 UP 3649 May 1937 Brooks 65669 Jun 1924 Dec 1949
UP 3550 UP 3650 Apr 1937 Brooks 65670 Jul 1924 Mar 1952
UP 3551 UP 3651 Jul 1937 Brooks 65671 Jul 1924 Dec 1949
UP 3552 UP 3652 Oct 1937 Brooks 65672 Jul 1924 Dec 1954
UP 3553 UP 3653 Oct 1937 Brooks 65673 Jul 1924 Dec 1954
UP 3554 UP 3654 Aug 1937 Brooks 65674 Jul 1924 Dec 1949
UP 3555 UP 3655 Jun 1937 Brooks 65675 Jul 1924 Mar 1952
UP 3556 UP 3656 Feb 1942 Brooks 65676 Jul 1924 Jul 1950
UP 3557 UP 3657 Jun 1937 Brooks 65677 Jul 1924 Aug 1947
UP 3558 UP 3658 Jun 1937 Brooks 65678 Jul 1924 Dec 1954
UP 3559 UP 3659 Dec 1943 Brooks 65679 Jul 1924 Oct 1953
UP 3560 UP 3660 Oct 1937 Brooks 65680 Jul 1924 Jul 1950
UP 3561 UP 3661 Jun 1938 Brooks 65681 Jul 1924 Apr 1952
UP 3562 UP 3662 May 1937 Brooks 65682 Jul 1924 Jan 1949
UP 3563 UP 3663 Jul 1943 Brooks 65683 Jul 1924 Jan 1954
UP 3564 UP 3664 Aug 1937 Brooks 65684 Jul 1924 Nov 1949

Description:

CS Class: SA-C-6
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1937-1943)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1937-1943)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Oil

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. Built as compound locomotives in 1924; rebuilt to simple locomotives in 1937-1943 (including changing drivers from 57 inches to 59 inches) and renumbered to UP 3500 series
c. Eight locomotives (UP 3648, 3649, 3651-3654, 3661, 3664) were converted to oil burners before 1938; remaining 12 locomotives converted to oil burners as 3500 series, after conversion to simple
d. Seven locomotives (UP 3648, 3649, 3651-3654, 3664) were equipped with a tender traction booster removed from an OWRR&N 9700 class 4-12-2s
   

OSL 2-8-8-0 -- 2 locomotives (simple; converted from compound)

1944 OSL
Number
First
Number
Date To
3500 Series
Builder Builder
Number
Date
Built
Date
Vacated
OSL 3565 OSL 3704 (1st) Apr 1944 Brooks 63779 Mar 1923 Nov 1949
OSL 3566 OSL 3705 (1st) Apr 1944 Brooks 63780 Mar 1923 Dec 1954

Description:

CS Class: SA-C-4
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1944)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1944)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Oil

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. Built as compound locomotives in 1923; rebuilt to simple locomotives in 1937-1943 (including changing drivers from 57 inches to 59 inches) and renumbered to UP 3500 series
c. OSL 3565 and 3566 were converted from coal burners to oil burners before July 1938
   

OWRR&N 2-8-8-0 -- 3 locomotives (simple; converted from compound)

1944 OWRR&N
Number
First
Number
Date To
3567 Series
Builder Builder
Number
Date
Built
Date
Vacated
OWRR&N 3567 OWRR&N 3803 (1st) Apr 1944 Brooks 63776 Mar 1923 Mar 1954
OWRR&N 3568 OWRR&N 3804 (1st) Apr 1944 Brooks 63777 Mar 1923 Mar 1954
OWRR&N 3569 OWRR&N 3805 (1st) Apr 1944 Brooks 63778 Mar 1923 Jul 1950

Description:

CS Class: SA-C-4
Cabside Class: SA-C-59
Drive Wheel Diameter: 59 inches (rebuilt from 57 inches in 1944)
Cylinders: 23&23x30 inches (rebuilt from 26&41x32 inches in 1944)
Maximum Tractive Effort: 99,840 pounds
Weight on Drivers: 474,980 pounds
Weight in Working Order (Engine Only): 505,480 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Oil (converted from coal)

General Notes:

a. Simple Articulated Consolidation (SA-C)
b. Built as compound locomotives in 1923; rebuilt to simple locomotives in 1944 (including changing drivers from 57 inches to 59 inches) and renumbered to OWRR&N 3500 series
c. Built as coal burners; converted to oil burners before 1938
   

UP 2-8-8-2 -- 19 locomotives (ex C&O)

1945 UP
Number
Previous
Number
Date To
UP
Builder Builder
Number
Date
Built
Date
Vacated
Notes
UP 3570 C&O 1540 Jun 1945 Schenectady 64976 Mar 1924 Jan 1947  
UP 3571 C&O 1541 Jun 1945 Schenectady 64952 Mar 1924 Feb 1947  
UP 3572 C&O 1542 Jun 1945 Schenectady 64953 Mar 1924 May 1947 1
UP 3573 C&O 1549 Jun 1945 Schenectady 64960 Mar 1924 Dec 1947  
UP 3574 C&O 1551 Jun 1945 Schenectady 64962 Mar 1924 May 1947  
UP 3575 C&O 1557 Jun 1945 Schenectady 64968 Mar 1924 May 1947  
UP 3576 C&O 1559 Jun 1945 Schenectady 64970 Mar 1924 May 1947  
UP 3577 C&O 1561 Jun 1945 Schenectady 64972 Mar 1924 Jan 1947  
UP 3578 C&O 1562 Jun 1945 Schenectady 64973 Mar 1924 Feb 1947 2
UP 3579 C&O 1563 Jun 1945 Schenectady 64974 Mar 1924 Sep 1947  
UP 3580 C&O 1543 Jun 1945 Schenectady 64954 Mar 1924 Mar 1947  
UP 3581 C&O 1544 Jun 1945 Schenectady 64955 Mar 1924 Oct 1947  
UP 3582 C&O 1545 Jun 1945 Schenectady 64956 Mar 1924 Sep 1947  
UP 3583 C&O 1547 Jun 1945 Schenectady 64958 Mar 1924 Aug 1947  
UP 3584 C&O 1548 Jun 1945 Schenectady 64959 Mar 1924 Oct 1947  
UP 3585 C&O 1550 Jun 1945 Schenectady 64961 Mar 1924 Sep 1947  
UP 3586 C&O 1554 Jun 1945 Schenectady 64965 Mar 1924 Nov 1947  
UP 3587 C&O 1555 Jun 1945 Schenectady 64966 Mar 1924 Apr 1947  
UP 3588 C&O 1556 Jun 1945 Schenectady 64967 Mar 1924 Sep 1947  

Description:

Cabside Class: 2-8-8-2
Drive Wheel Diameter: 57 inches
Cylinders: 23&23x32 inches
Maximum Tractive Effort: 113,595 pounds
Weight on Drivers: 493,070 pounds
Weight in Working Order (Engine Only): 567,500 pounds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Coal

General Notes:

a. These 19 locomotives were purchased by UP from C&O in 1945 to help move wartime traffic across Wyoming; vacated and scrapped in 1947 as soon as traffic slowed down.
b. UP retained the tenders from all 30 ex C&O locomotives, designating them as four different tender classes depending on each tender's capacity: 21-RC (10 tenders); 21-RD (3 tenders); 23-RD (6 tenders); and 25-RC (11 tenders). Of the 30 tenders, 14 were sold directly to SP, nine were later scrapped, two were converted for use as water storage; two were assigned to new rotary snow plows, two were rebuilt to a auxiliary steam generator cars, and one was converted for use as fuel storage.

Notes:

1. The tender from UP 3572 was later assigned to rotary snow plow 076 upon its delivery in January 1950; later numbered as UP 900076.
2. The tender from UP 3578 was rebuilt as Auxiliary Steam Generator Car B-1.
   

UP 2-8-8-2 -- 11 locomotives (ex C&O)

1945 UP
Number
Previous
Number
Date To
UP
Builder Builder
Number
Date
Built
Date
Vacated
Notes
UP 3589 C&O 1574 Jun 1945 Baldwin 58966 Jan 1926 Apr 1947 1
UP 3590 C&O 1581 Jun 1945 Baldwin 59058 Feb 1926 Mar 1947  
UP 3591 C&O 1585 Jun 1945 Baldwin 59113 Mar 1926 Mar 1947  
UP 3592 C&O 1589 Jun 1945 Baldwin 59177 May 1926 Mar 1947 2
UP 3593 C&O 1575 Jun 1945 Baldwin 59052 Feb 1926 Dec 1947  
UP 3594 C&O 1571 Jun 1945 Baldwin 58950 Feb 1926 May 1947  
UP 3595 C&O 1579 Jun 1945 Baldwin 59056 Feb 1926 Sep 1947  
UP 3596 C&O 1577 Jun 1945 Baldwin 59054 Feb 1926 Mar 1947  
UP 3597 C&O 1582 Jun 1945 Baldwin 59110 Mar 1926 May 1946  
UP 3598 C&O 1586 Jun 1945 Baldwin 59174 May 1926 Apr 1947  
UP 3599 C&O 1587 Jun 1945 Baldwin 59175 May 1926 Mar 1947  

Description:

Cabside Class: 2-8-8-2
Drive Wheel Diameter: 57 inches
Cylinders: 23&23x32 inches
Maximum Tractive Effort: 113,595 pounds
Weight on Drivers: 493,910 pounds, with Duplex stokers (504,500 pounds, with Standard stokers)
Weight in Working Order (Engine Only): 572,330 pounds, with Duplex stokers (584,600 pounds, with Standard stokers)
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Coal

General Notes:

a. These 11 locomotives were purchased by UP from C&O in 1945 to help move wartime traffic across Wyoming; vacated and scrapped as soon as traffic slowed down.
b. UP retained the tenders from all 30 ex C&O locomotives, designating them as four different tender classes depending on each tender's capacity: 21-RC (10 tenders); 21-RD (3 tenders); 23-RD (6 tenders); and 25-RC (11 tenders). Of the 30 tenders, 14 were sold directly to SP, nine were later scrapped, two were converted for use as water storage; two were assigned to new rotary snow plows, two were rebuilt to a auxiliary steam generator cars, and one was converted for use as fuel storage.

Notes:

1. The tender from UP 3589 was rebuilt as Auxiliary Steam Generator Car B-2.
2. The tender from UP 3592 was later assigned to rotary snow plow 075 upon its delivery in January 1950; later numbered as UP 900075.

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