Union Pacific Railroad

Union Pacific Railroad
	File:Union Pacific Railroad logo.svg Union Pacific Railroad logo
Company type	Subsidiary
Industry	Rail transport
Founded	July 1, 1862; 164 years ago
Headquarters	Omaha, Nebraska, United States
Area served	23 U.S. states west of Chicago and New Orleans
Key people	(not specified)
Products	Freight rail transport
Number of employees	33,000 (1999)
Parent	Union Pacific Corporation

The Union Pacific Railroad is a Class I freight carrier operating a fleet of 8,300 locomotives across an extensive network spanning of track in 23 U.S. states located west of Chicago and New Orleans. It holds the position of the second largest railroad in the United States, following BNSF Railway, and together they dominate transcontinental freight rail service throughout the Western, Midwestern, and West South Central areas.

Established in 1862 as part of the inaugural transcontinental railroad initiative known as the Overland Route, Union Pacific grew through key acquisitions such as the Missouri Pacific Railroad, Western Pacific Railroad, Missouri–Kansas–Texas Railroad, and Chicago, Rock Island and Pacific Railroad. Its 1995 merger with Chicago and North Western Transportation Company expanded its presence into the Upper Midwest. The subsequent 1996 merger with Southern Pacific Transportation Company, which had itself absorbed the Denver and Rio Grande Western Railroad, further extended its network.

The Union Pacific Railroad Company functions as the main operating entity under Union Pacific Corporation, with both organizations headquartered at the Union Pacific Center in Omaha, Nebraska. This corporate configuration enables its substantial market reach and operational capacity along vital freight corridors across the United States.

Union Pacific during the 19th century

Incorporated on July 1, 1862, as "Union Pacific Rail Road" under the authority of the Pacific Railroad Act of 1862, this legislation was signed by President Abraham Lincoln to facilitate rail construction from the Missouri River to the Pacific Coast, aiming to preserve Union unity during the American Civil War. Construction was completed following the war’s conclusion.

Initially designed to span from the Nevada–Utah border to the Colorado–Kansas border, lobbying efforts by Dr. Thomas Clark Durant resulted in relocating the eastern terminus to connect with Iowa’s Mississippi and Missouri Railroad. By 1863, Durant secured sufficient stock subscriptions to commence building operations.

The railroad extended westward from Council Bluffs, Iowa, linking with tracks laid eastward by the Central Pacific Railroad from Sacramento, California. The union of these two lines created the first transcontinental railroad, later recognized as the Overland Route.

Primarily constructed by Irish laborers experienced from Civil War service, under Durant’s direction rails were installed beginning in Omaha. The two lines converged at Promontory Summit, Utah, located west of Ogden, Utah, on May 10, 1869. Leland Stanford, founder of Central Pacific (which eventually merged with Union Pacific), famously drove in the golden spike engraved with "to span the continent and wed the oceans."

Union Pacific broadened its system by acquiring three narrow-gauge railroads originally built by Mormon settlers: Utah Central Railroad (1869–1881), Utah Southern Railroad (1871–1881), and Utah Northern Railroad. Additional purchases included both the Utah Eastern and Utah Western Railroads.

The company became embroiled in the Crédit Mobilier scandal of 1872 when its primary construction contractor overbilled Union Pacific and bribed legislators to sanction inflated expenses. Despite triggering a financial crisis in 1873, Union Pacific managed to avoid insolvency.

In 1880, under majority shareholder Jay Gould, Union Pacific absorbed and merged with Kansas Pacific Railroad, adopting the name "Union Pacific Railway." The network expanded northwestward reaching Portland, Oregon, and extended south through Colorado via Union Pacific, Denver and Gulf Railway.

After declaring bankruptcy amid the Panic of 1893, a corporate restructuring reinstated its original name as Union Pacific "Railroad."

Union Pacific in the 20th century

At the dawn of the 20th century, Union Pacific redirected its efforts from expansion toward enhancing its internal infrastructure. To manage the excess agricultural products from California’s Central and Salinas Valleys, UP collaborated with competitor Southern Pacific to create a refrigerated railcar system resistant to spoilage. This partnership led to the establishment of Pacific Fruit Express in 1906, which grew to become the largest lessee of refrigerated railcars worldwide.

In 1904, UP inaugurated the Lucin Cutoff, a more efficient and direct rail line that reduced both curvature and elevation changes, replacing the older route ascending to Promontory Summit. The original line was dismantled during World War II in 1942 to provide scrap metal for the war effort.

During the Great Depression, Chairman W. Averell Harriman focused on upgrading UP’s rolling stock and developing unique travel destinations to boost ridership. This included acquiring the pioneering streamlined train, the M-10000, and launching the Sun Valley ski resort in Idaho in 1936, which was later sold in 1964. Although UP experimented early with diesel technology, it completed its transition away from steam locomotives relatively late, receiving its final steam engine, Union Pacific 844, in 1944.

By mid-century, UP recognized that remaining a regional carrier posed financial risks. On December 31, 1925, UP and its subsidiaries operated about 9,834 route miles and 15,265 track miles—a scale that remained largely unchanged through 1980. Nevertheless, targeted acquisitions significantly expanded UP’s reach: Missouri Pacific and Western Pacific were absorbed in 1982, followed by Missouri–Kansas–Texas Railroad in 1988. By 1993, Union Pacific had doubled its route mileage to 17,385 miles.

As industry consolidation accelerated, UP merged with Chicago and North Western in 1995. To contend with BNSF—a mega-railroad formed by the Burlington Northern and ATSF merger—UP acquired Southern Pacific along with its subsidiaries Denver and Rio Grande Western Railroad and St. Louis Southwestern Railway. This created a dominant duopoly across the western United States under the Union Pacific brand. By 1999, UP’s operations spanned more than 33,700 miles of track with nearly 33,000 employees, approximately 7,000 locomotives, and over 155,000 railcars.

Revenue freight ton-miles (millions)
Year	UP
1925	12,869
1933	8,639
1944	37,126
1960	33,280
1970	47,575
1979	73,708
1993	220,697

Union Pacific in the 21st century

In March of 2024, Union Pacific came under Federal Railroad Administration (FRA) scrutiny regarding workforce reductions. The FRA stressed that "railroad operational safety is paramount" and expressed concern that UP’s layoffs were occurring at a rate "far exceeding those of other Class I railroads." The agency urged UP to maintain experienced staff for essential inspections and maintenance tasks.

The year 2024 also marked Union Pacific’s sesquicentennial anniversary at its Omaha headquarters, underscoring its enduring corporate presence. That same year saw the launch of the "Heartland of America" tour featuring Big Boy #4014—the largest operational steam locomotive globally—which traveled through fourteen Midwestern states between August and October. This locomotive is particularly rare as only one of the original twenty-five World War II-era Big Boys remains functional.

Another significant piece of UP heritage is locomotive No. 4141, dedicated to former President George H. W. Bush. Displayed permanently at the George H. W. Bush Presidential Center in Texas and painted in Air Force One livery, this engine notably pulled the president’s funeral train in 2018, symbolizing Union Pacific’s connection to national history.

Looking forward, on July 17, 2025, Union Pacific initiated preliminary negotiations concerning a potential acquisition of Norfolk Southern Railway. This prospective deal could considerably increase UP’s market share and reinforce its standing within North America’s rail industry.

Facilities

Union Pacific manages a vast network of yards, predominantly flat yards dedicated to local switching operations, alongside intermodal terminals and hump yards. While the majority of intermodal terminals are situated at port locations, there are also inland facilities designed for truck-to-rail transfers, including those established in San Antonio in 2009 and Santa Teresa, New Mexico in 2014.

Hump yards

By 2006, Union Pacific operated 11 significant active hump yards:

Bailey Yard located in North Platte, Nebraska
Beaumont Yard in Beaumont, Texas
Davidson Yard situated in Fort Worth, Texas
Davis Yard in Roseville, California
Englewood Yard based in Houston, Texas
Gateway Yard in East St Louis, Illinois, owned by subsidiary Alton and Southern Railway
Livonia Yard positioned in Livonia, Louisiana
North Little Rock Yard found in North Little Rock, Arkansas
Proviso Yard at Northlake, Illinois, acquired from the Chicago and North Western Transportation Company in 1995
Strang Yard located in La Porte, Texas
West Colton Yard in Bloomington, California

During the late 2010s, Union Pacific began phasing out several hump yards as part of adopting Precision Scheduled Railroading (PSR), a methodology focused on streamlining operations by minimizing complex yard processes. This transition resulted in the closure of yards such as Neff yard in Kansas City, Hinkle in Oregon, and Pine Bluff in Arkansas during 2019. This approach reflects broader industry movements toward operational efficiency and improved financial outcomes through optimized asset use.

Locomotives and rolling stock

Union Pacific has been known for operating some of the most powerful locomotives within the rail industry. Its roster includes the Challenger-type locomotives (notably 3985), Northern-type engines (such as 844), and the legendary steam-powered Big Boy class (including 4014). The company was a pioneer in diesel streamliner technology with the introduction of the first diesel streamliner, managed the largest fleet globally of turbine-electric locomotives (Union Pacific GTELs), and possessed the biggest diesel locomotives ever constructed (DDA40X, including unit 6936).

Paint and colors

In 1934, Union Pacific unveiled its signature yellow paint scheme aimed at improving visibility and reducing accidents at grade crossings. By 1941, the railroad adopted the enduring color combination of yellow and gray accented with red highlights—a palette that continues to define its visual brand.

The main body of locomotives is painted Armour Yellow, a hue inspired by Armour and Company's packaging design, covering roughly two-thirds of the central area. Thin stripes of Signal Red separate this yellow section from Harbor Mist Gray applied to the upper body and roof. Since 2005, Federal Railroad Administration mandates have replaced the red lower bands with yellow reflective tape for enhanced safety. The undercarriage components such as trucks, fuel tanks, and underframe are finished in Harbor Mist Gray. Lettering and numbering utilize Signal Red outlined in black. Most locomotives feature white-bordered blue "wings" on their noses flanking a shield that displays white letters on a blue background with red-and-white stripes beneath. Beginning in 2002, select units were repainted to showcase a prominent American flag along with the corporate slogan "Building America" on their sides instead of the traditional 'UNION PACIFIC' lettering.

Locomotives from Merged Railroads

Up until 2017, Union Pacific operated locomotives displaying the paint schemes of predecessor railroads. Many units were renumbered by applying a yellow patch over the original number and placing a new UP number on the cab, which enabled integration into the fleet without incurring the expense of complete repainting. In May 2015, there were 212 such "patch" locomotives on the roster, including:

22 units originally from Chicago and North Western (with CNW logos concealed),
174 Southern Pacific models (including AC4400CW, GP40-2, MP15AC, GP60),
14 from St. Louis Southwestern (GP60),
2 Denver and Rio Grande Western (GP60).

Additionally, one SD40-2 featuring a 1970s paint scheme was retained until it was retired.

Starting in 2017, Union Pacific began transitioning all locomotives to the current corporate livery; by early 2018, only 41 units remained in their original paint.

Special Commemorative Liveries

Between 2005 and 2006, Union Pacific introduced six EMD SD70ACe locomotives adorned with "Heritage Colors," celebrating railroads acquired since the 1980s. The locomotive numbers correspond to the year each predecessor was absorbed into UP, honoring Missouri Pacific (1982), Western Pacific (1983), Missouri–Kansas–Texas (1988), Chicago and North Western (1995), Southern Pacific (1996), and Denver and Rio Grande Western (1989).

In October 2005, UP revealed SD70ACe No. 4141 painted in a scheme inspired by Air Force One to honor former President George H. W. Bush. After being stored in 2007, it was brought back for Bush’s funeral train in 2018 and subsequently donated to the George H. W. Bush Presidential Library in 2019.

Other commemorative locomotives include:

March 2010: GE ES44AC celebrating the Boy Scouts of America’s centennial,
September 2010: GE ES44AC dedicated to Susan G. Komen for the Cure,
October 2017: SD70AH No. 1943 "The Spirit of the Union Pacific," honoring U.S. military personnel,
June 2019: SD70ACe No. 1111 "Powered By Our People" edition,
April 2021: SD70M No. 1979 painted "We Are ONE" to recognize Juneteenth and Pride Month.

Union Pacific also operates locomotives painted for Operation Lifesaver, a rail safety campaign founded in 1970.

Locomotive Inventory

As of December 2023, Union Pacific's active locomotive fleet consisted of 7,175 units spanning 42 different models, reflecting a significant investment in a varied and modern roster.

Model	Quantity
C40-8	3
C40-8W	7
C41-8W	28
C44-9W	217
C44AC	511
C44ACCTE	543
C44ACM	655
C45ACCTE	937
C45AH	465
CCRCL	6
E9	2
GP15-1	46
GP15N	22
GP22	10
GP38-2	85
GP38N	167
GP39-2	10
GP39N	7
GP40-2	61
GP40N	129
GP59ECO	1
GP60	137
GP60E	33
GP62	16
MP15AC	1
PS4B	1
PS6B	67
RP18G	14
SD40-2	2
SD40N	486
SD59MX	28
SD60	45
SD60E	1
EMD SD60M	132
SD62	18
SD62E	13
SD70ACe	510
SD70AH	368
EMD SD70 series SD70M	1,365
EMD SD90MAC#SD9043AC	23
SNOW PLOW	1
STEAM	2

Historic equipment

Union Pacific preserves a distinguished collection of heritage steam and early diesel locomotives, utilized for exclusive charters and special excursions, reflecting its dedication to celebrating railroad history as a core element of its corporate image.

Model	Number
4-8-8-4 Big Boy	1
4-8-4 FEF-3	1
E9A	2
E9B	1

Environmentally friendly locomotives

To meet environmental regulations, particularly within the Los Angeles area, Union Pacific operates an expanding roster of low-emission locomotives. This initiative underscores the company’s commitment to sustainability and adherence to regulatory standards.

Model	Number
NRE 2GS14B	1
GP22T4	10
MP20B	13
3GS21B	59
PR30C	≥6
GG20GE	21
Other models	≤71

This varied selection of locomotives enhances Union Pacific’s operational effectiveness, supports environmental objectives, and strengthens its competitive positioning on a worldwide scale.

Key data

According to Union Pacific’s 2007 Annual Report, the company employed more than 50,000 personnel and operated a fleet comprising 8,721 locomotives alongside 94,284 freight cars. The composition included:

35,437 covered hopper cars
12,272 boxcar units
18,647 open-top hopper cars
13,780 gondola cars
14,148 various other freight car types

Furthermore, Union Pacific possessed 6,950 pieces of maintenance of way machinery. The average age of its locomotive fleet was approximately 14.8 years, while freight cars averaged 28 years in service.

By the year 2019, Union Pacific was ranked 134th on the Fortune 500 list, reflecting solid revenue performance and employing 41,967 individuals. As of August 2023, the executive team featured CEO Jim Vena, President Beth Whited, and Chairman Mike McCarthy.

Despite its prominent industry position and extensive operations worldwide, Union Pacific encountered reputation difficulties in 2019 when it was identified by 247wallst.com as the least favorable company to work for. This rating was based on low approval scores for then-CEO Lance Fritz and employee reviews gathered from Glassdoor.com.

Commuter rail operations

Following its acquisition of the Chicago & North Western in 1995, Union Pacific assumed responsibility for the railroad’s Metra commuter rail lines in the Chicago metropolitan area. These included the Union Pacific North Line extending to Kenosha, Wisconsin, the Northwest Line reaching Harvard, Illinois, and the West Line terminating at Elburn, Illinois. All services operate out of the Ogilvie Transportation Center (previously known as North Western Station). To ensure uniformity across Chicago’s commuter network, trains were marketed under the Metra brand using Metra-owned equipment while Union Pacific crews managed operations under a purchase-of-service contract. In 2025, operational control of these commuter lines was transferred to Metra; however, Union Pacific retained ownership of the rail corridors and continues to oversee dispatching functions.

Discontinued services

Between 1869 and 1971, Union Pacific ran passenger trains along its renowned "Overland Route," which included services between Chicago and Omaha utilizing Chicago & Northwestern tracks starting in 1936. Following disagreements over track access and revenue sharing with C&NW, UP transitioned to using the Milwaukee Road for its streamliner routes connecting Chicago and Omaha in late 1955. The final intercity passenger train operated by Union Pacific was the westbound City of Los Angeles, which arrived at Los Angeles Union Station on May 2, 1971. Since that time, Union Pacific has fulfilled its common carrier duties by accommodating Amtrak services.

Trains operating on Union Pacific tracks

Numerous Amtrak and commuter rail lines run on Union Pacific-owned rail infrastructure, excluding commuter lines formerly managed by UP in the Chicago area.

Amtrak

Commuter rail

Incidents in the 21st century

September 4, 2007: A Union Pacific train derailed near Sergeant Bluff, Iowa, spilling salt from approximately sixteen cars and causing a two-hour traffic disruption.
June 24, 2012: A head-on collision east of Goodwell, Oklahoma resulted in three crew fatalities and $15 million in damages. The eastbound train failed to stop at a signal; the NTSB attributed the accident to operator vision impairments and UP’s noncompliance with medical recertification standards.
November 15, 2012: In Midland, Texas, a Union Pacific train collided with a parade float, leading to four deaths and sixteen injuries.
May 25, 2013: A crash involving a BNSF train at a Missouri junction injured seven individuals and caused over $10 million in damage, including partial collapse of a highway overpass. The investigation identified engineer fatigue as the primary cause.
June 3, 2016: Near Mosier, Oregon, a derailment of a ninety-six-car oil train released about 42,000 gallons of Bakken crude oil into the Columbia River Gorge; roughly 10,000 gallons were recovered.
Mid to late 2018: The migrating Niland Geyser adjacent to the Salton Sea necessitated significant engineering efforts to safeguard Union Pacific’s rail lines.
September 7, 2019: A derailment involving a liquefied petroleum gas train occurred in Portland’s Albina Yard, damaging an overpass support vital for industrial traffic. Four lanes were shut due to structural damage; broken rails were identified as the cause. The train was operated remotely without crew onboard.
March 21, 2022: A freight train derailed and fell from an elevated viaduct in Colton, California.
September 2023: Union Pacific furloughed 138 employees amid safety-related concerns; the Federal Railroad Administration (FRA) reported defect rates twice the national average attributed to workforce shortages.
December 18, 2024: In Pecos, Texas, a collision between a train and an oversized semi-truck caused derailment of four locomotives and several hazardous material freight cars. Both UP crew members died; three others sustained injuries. Diesel fuel leaks were contained effectively.
May 18, 2025: An EF-3 tornado overturned approximately one hundred double-stack railcars on a stationary UP train near Haviland, Kansas. There were no fatalities or hazardous material releases reported.

San Antonio region

On June 28, 2004, in a suburb of San Antonio, a Union Pacific (UP) train collided with a stationary BNSF train, resulting in a derailment that breached a 90-ton tank car filled with liquefied chlorine. This incident released a hazardous "yellow cloud," which caused three fatalities and hospitalized 43 individuals. The cleanup and property damage expenses surpassed $7 million. Investigations identified significant safety violations by UP, including noncompliance with internal safety protocols by employees. Crew fatigue was determined as the immediate cause, while the risky positioning of chlorine tank cars near the front of the train exacerbated the danger.

This was not an isolated event for UP in the San Antonio vicinity; between May and November 1994, five derailments occurred, causing at least four deaths. Between June 2004 and March 2005, an additional ten derailments took place, resulting in similar fatal outcomes.

After the Macdona accident, the Federal Railroad Administration (FRA) entered into a compliance agreement with UP to rectify "significant deficiencies." Nevertheless, some critics contended that the FRA’s enforcement was insufficiently stringent toward rail operators. In March 2005, Texas Governor Rick Perry endorsed a voluntary initiative aimed at rerouting trains away from densely populated urban areas such as San Antonio, although no specific timeline was established.

Derailments have persisted within the area, including a June 2009 event involving tank cars transporting chlorine and petroleum naptha xylene that derailed without releasing hazardous materials. These recurring incidents underscore ongoing operational challenges for UP in ensuring safety and mitigating risks in critical markets.

Issues with transient camps and graffiti

In 2019, the City of San Jose, California threatened legal action against Union Pacific due to prolonged problems with transient encampments and graffiti along its railway corridors. Following years of grievances, UP initiated cleanup operations in November 2019. San Jose Councilman Sergio Jimenez criticized the railroad company for failing to act as a responsible neighbor. Meanwhile, Mayor Sam Liccardo expressed doubts about UP’s responsiveness but hoped that a newly established memorandum of understanding would foster better cooperation. Despite this, reports suggested that Union Pacific remained largely uncooperative and did not meet commitments related to graffiti removal.

Utah legislative measures in 2022

During 2022, Utah lawmakers introduced two bills addressing conflicts with Union Pacific over rail crossing improvements. In Logan, Utah, UP imposed indefinite maintenance fees on the city for an upgraded crossing, which contravened state law. The proposed legislation sought to simplify approval processes for crossing enhancements and clarify which party bears maintenance costs. Ultimately, HB181 was enacted as part of regulatory efforts to govern Union Pacific’s practices concerning municipal infrastructure projects.

Environmental performance

In Eugene, Oregon, Union Pacific partnered with the Oregon Department of Environmental Quality in 2008 to investigate groundwater contamination originating from a rail yard active for over a century. The study targeted pollutants such as petroleum hydrocarbons, industrial solvents, and heavy metals.

In 2007, UP collaborated with the U.S. Environmental Protection Agency to reduce emissions from locomotives by installing oxidation catalyst canisters and adopting ultra-low-sulfur diesel fuel. These measures decreased particulate emissions by 50%, unburned hydrocarbons by 38%, and carbon monoxide by 82%.

The company’s Fuel Master initiative rewards locomotive engineers who achieve fuel efficiency improvements; this program has generated multimillion-dollar savings annually and earned founder Wayne Kennedy the John H. Chafee Environmental Award in 2006. Transportation Secretary Norman Mineta also recognized this effort.

In January 2018, an employee contractor at UP’s Albina Yard in Portland accidentally discharged roughly 1,800 gallons of oil into the Willamette River. The individual pleaded guilty to violations of the Clean Water Act and received probation along with a monetary penalty.

Union Pacific faced litigation in 2016 concerning remediation of contamination at a Lafayette, Louisiana rail yard operational from the late 19th century through the 1960s. In Houston, residents living near a UP rail yard filed lawsuits after state health reports linked elevated cancer rates to proximity to the facility; a subsequent Texas report in 2021 identified an additional cluster of childhood lymphoblastic leukemia cases.

In response to poor winter air quality concerns in Utah during 2022, HB405 was proposed requiring Union Pacific to replace Tier 0 switching locomotives with hydrogen or electric alternatives by 2028. Following negotiations and voluntary commitments from UP to substitute some Tier 0 units with cleaner Tier 2 models and conduct electric locomotive trials at Roper Rail Yard, the bill was withdrawn.

Wabtec is engaged in upgrading 600 older Union Pacific locomotives through 2025 to improve fuel economy, reliability, and reduce emissions.

Equipment Management Pool (EMP)

Union Pacific, together with Norfolk Southern, stands as the principal owner-partners of the Equipment Management Pool (EMP), a North American domestic interline intermodal freight network overseeing a fleet exceeding 35,000 53-foot containers and chassis. Additional participants in the pool include Canadian National Railway, I&M Rail Link, Iowa Interstate Railroad, and Wisconsin Central Ltd.. In 2022, prior to its merger with Kansas City Southern Railway, Canadian Pacific Railway exited the pool, resulting in CN remaining as the only Canadian participant.