Union Pacific No. 4023

UP No. 4023
Union Pacific No. 4023 as seen today on static display at Kenefick Park.
Overview -
Propulsion:	Steam
Loco Type:	Big Boy
Gauge:	4 ft 8 1⁄2 in (1,435 mm)
Status:	Preserved on static display
Location:	Kenefick Park, South Omaha, NE, US
History -
Designer:	Otto Jabelmann A.H. Fetters
Livery:	UP Unlined Freight Black
Manufacturing Details:
Builder:	American Locomotive Company (ALCo.)
(b/n) Builder's No.	72780
Build Date:	November 1944
Service:
Former Operators:	Union Pacific Railroad
No.	4023
Years in Operation:	1944 - 1959
Fleet No's:	4023
Withdrawn:	1959
Preservation:
Date Preserved:	1963
Wheel Arrangement:
Whyte Notation:	4-8-8-4+T
UIC-Classification:	(2′D)D2′ h4
Picture-Scheme:	ooOOOO OOOOoo
Configuration Name:	Big Boy
Axle No.	12
Boiler & Firebox:
Current Boiler Pressure:	300 lbf/in2 (2.1 MPa)
Heating Surface:	5,889 sq. ft. (547 m2)
Tubes:	967 sq. ft. (90 m2)
Cylinders:
Cylinders (Dia. x Stroke):	24 in × 32 in (610 mm × 813 mm)
Operation:
Fuel Capacity:	6, 450 US Gallons
Water Capacity:	25,000 US Gallons (95,000 l; 21,000 Imperial Gallons)
Weight of Locomotive:	762,000 lb (345,637 kg)
Total Weight:	1,198,500 lb (543,630 kg)
Weight of Tender(s):	436,500 lb (197,993 kg)
Performance Statistics:
Horsepower:	7, 000
Maximum Speed:	80 mph (130 km/h)
Tractive Effort:	138,240 lbf (614.9 kN)
Dimensions:
Total Length:	132 ft. 9 7⁄8 in (40.48 m)
Valves & Motion:
Valve Gear:	Heusinger

Union Pacific No. 4023, or UP 4023, is a four-cylinder articulated 4-8-8-4 locomotives Big Boy-type steam locomotive owned by the Union Pacific Railroad (UP). It was built in November 1944, by the American Locomotive Company (ALCO) of Schenectady, New York specifically for fast and heavy freight services through the Wasatch Mountains for the UP.

It last operated in service in July 1959 and was later retired in July 1962 after logging nearly 830,000 miles on the road. After being withdrawn, No. 4023 was placed on the UP's scrapline along with the other Big Boy locomotives but was thankfully spared the cutters torch.

In 1963, No. 4023 was cosmetically restored and put on display for that year's National Railway Historical Society (NRHS) Convention in Cheyenne, Wyoming alongside 4-6-6-4 "Challenger" No. 3985 and 4-8-4 locomotives "Northern" No. 844. Once the convention was over, No. 4023 was moved along with No. 3985 inside the Cheyenne roundhouse for storage.

In 1974, No. 4023 was once again cosmetically restored and towed to Omaha, Nebraska to be placed on static display in front of the Union Pacific's locomotive shops until their closure in 1988. No. 4023 was then moved to the original Kenefick Park on Abbott Drive, near the former UP shop site until redevelopment in the area had forced the closure of Kenefick Park. No. 4023 was then temporarily housed outside of the Durham Museum in Downtown Omaha.

In 2005, No. 4023 alongside UP EMD DDA40X No. 6900 were both moved by truck to the new location for static display at the new Kenefick Park which is located on a bluff overlooking the Missouri River next to Lauritzen Gardens, Nebraska's botanical gardens, on Bancroft Street just off the I-80 in South Omaha, NE. The two engines still reside there to this day.

Trivia

• No. 4023's and No. 6900's move to Kenefick Park in 2005 was featured in an episode of "Huge Moves".
• It is one of eight surviving UP Big Boys currently in preservation.
• It is the only surviving member that was built in the second batch of Big Boys that were constructed in 1944 while the other seven survivors all came from the first batch in 1941.
• The engine can be seen side by side with fellow surviving Big Boy #4004 in Herron Rail Video's Articulateds America's Biggest Steam DVD.

Gallery

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Preserved Union Pacific Locomotives
UP Class 700	No. 737
UP Class C-2	No. 237 • No. 264 • No. 561 • No. 616 • No. 618 • No. 6051 • No. 6237
UP Class C-57	No. 407 • No. 421 • No. 428 • No. 437 • No. 460 • No. 477 • No. 480 • No. 481 • No. 485
UP Class MK-1	No. 2005
UP Class MK-7	No. 2537
UP Class MK-9	No. 2295
UP Class MK-10	No. 2564
UP Class T-57	No. 1242 • No. 1243
UP Class P-1	No. 3206
UP Class P-2	No. 3203
UP Class TTT-6	No. 5511
UP Class S-4	No. 4420
UP Class S-5	No. 4436 • No. 4439 • No. 4442
UP Class S-6	No. 4455 • No. 4466
UP Class FEF-1	No. 814
UP Class FEF-2	No. 833
UP Class FEF-3	No. 838 • No. 844
UP Class 9000	No. 9000
UP Heavy Challengers	No. 3977 • No. 3985
UP Big Boys	No. 4004 • No. 4005 • No. 4006 • No. 4012 • No. 4014 • No. 4017 • No. 4018 • No. 4023 List of Union Pacific Big Boy Locomotives Real-Life Members: 4000 • 4001 • 4002 • 4003 • 4004 • 4005 • 4006 • 4007 • 4008 • 4009 • 4010 • 4011 • 4012 • 4013 • 4014 • 4015 • 4016 • 4017 • 4018 • 4019 • 4020 • 4021 • 4022 • 4023 • 4024 Fallen: 4000 • 4001 • 4002 • 4003 • 4007 • 4008 • 4009 • 4010 • 4011 • 4013 • 4013 • 4015 • 4016 • 4019 • 4020 • 4021 • 4022 • 4024 Preserved: 4004 • 4005 • 4006 • 4012 • 4014 • 4017 • 4018 • 4023