America's first transcontinental railroad (known originally as the "Pacific Railroad" and later as the "
Overland Route") was a continuous railroad line built between 1863 and 1869 that connected the existing eastern U.S. rail network at
Council Bluffs, Iowa, with the Pacific coast at the
Oakland Long Wharf on
San Francisco Bay
San Francisco Bay (Chochenyo language, Chochenyo: 'ommu) is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, California, San ...
. The rail line was built by three private companies over public lands provided by extensive
U.S. land grants.
[Pacific Railroad Act of 1862, §2 & §3] Building was financed by both state and U.S. government subsidy bonds as well as by company-issued mortgage bonds.
[Pacific Railroad Act of 1862, §5 & §6] The
Western Pacific Railroad Company built of track from the road's western terminus at
Alameda/
Oakland to
Sacramento, California
Sacramento ( or ; ; ) is the List of capitals in the United States, capital city of the U.S. state of California and the county seat, seat of Sacramento County, California, Sacramento County. Located at the confluence of the Sacramento Rive ...
. The
Central Pacific Railroad Company of California (CPRR) constructed east from Sacramento to
Promontory Summit, Utah Territory. The
Union Pacific Railroad
The Union Pacific Railroad is a Railroad classes, Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United Stat ...
(UPRR) built from the road's eastern terminus at the
Missouri River
The Missouri River is a river in the Central United States, Central and Mountain states, Mountain West regions of the United States. The nation's longest, it rises in the eastern Centennial Mountains of the Bitterroot Range of the Rocky Moun ...
settlements of Council Bluffs and
Omaha, Nebraska
Omaha ( ) is the List of cities in Nebraska, most populous city in the U.S. state of Nebraska. It is located in the Midwestern United States along the Missouri River, about north of the mouth of the Platte River. The nation's List of United S ...
, westward to Promontory Summit.
[Executive Order of Abraham Lincoln, President of the United States, Fixing the Point of Commencement of the Union Pacific Railroad at Council Bluffs, Iowa, dated March 7, 1864](_blank)
(38th Congress, 1st Session SENATE Ex. Doc. No. 27).
The railroad opened for through traffic between Sacramento and Omaha on May 10, 1869, when CPRR President
Leland Stanford
Amasa Leland Stanford (March 9, 1824June 21, 1893) was an American attorney, industrialist, philanthropist, and Republican Party (United States), Republican Party politician from Watervliet, New York. He served as the eighth governor of Calif ...
ceremonially tapped the gold "Last Spike" (later often referred to as the "
Golden Spike
The golden spike (also known as the last spike) is the ceremonial 17.6-Carat (purity), karat gold final Rail spike, spike driven by Leland Stanford to join the rails of the first transcontinental railroad across the United States connecting t ...
") with a silver hammer at
Promontory Summit. In the following six months, the last leg from Sacramento to San Francisco Bay was completed. The resulting coast-to-coast railroad connection revolutionized the settlement and economy of the
American West
The Western United States (also called the American West, the Western States, the Far West, the Western territories, and the West) is census regions United States Census Bureau
As American settlement in the U.S. expanded westward, the mea ...
. It brought the western states and territories into alignment with the northern Union states and made transporting passengers and goods coast-to-coast considerably quicker, safer and less expensive.
The first transcontinental rail passengers arrived at the Pacific Railroad's original western terminus at the
Alameda Terminal on September 6, 1869, where they transferred to the steamer ''Alameda'' for transport across the Bay to San Francisco. The road's rail terminus was moved two months later to the
Oakland Long Wharf, about a mile to the north, when its expansion was completed and opened for passengers on November 8, 1869. Service between San Francisco and Oakland Pier continued to be provided by ferry.
The CPRR eventually purchased of UPRR-built grade from Promontory Summit (MP 828) to
Ogden, Utah Territory (MP 881), which became the interchange point between trains of the two roads. The transcontinental line became popularly known as the ''
Overland Route'' after the name of the principal passenger rail service to
Chicago
Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...
that operated over the length of the line until 1962.
Overall significance
Railroads not only increased the speed of transport, they also dramatically lowered its cost. The first transcontinental railroad resulted in passengers and freight being able to cross the country in a matter of days instead of months and at one tenth the cost of stagecoach or wagon transport. With economical transportation in the West (which had been referred to as the
Great American Desert
The term Great American Desert was used in the 19th century to describe the part of North America east of the Rocky Mountains to approximately the 100th meridian west, 100th meridian. It can be traced to Stephen Harriman Long, Stephen H. Long's ...
) now farming, ranching and mining could be done at a profit. As a result, railroads transformed the country, particularly the West (which had few navigable rivers).
For example, before the railroads were built in the West, if a farmer were to ship a load of corn only 200 miles to Chicago, the shipping cost by wagon would exceed the price for which the corn could be sold. So, under such circumstances, farming could not be done at a profit. Mining and other economic activity in the West were similarly inhibited because of the high cost of wagon transportation. One Congressman, referring to the West, bluntly stated that, “All that land wasn’t worth ten cents until the railroads came.”
Freight rates by rail were a small fraction of what they had been with wagon transport. When the United States concluded the
Louisiana Purchase
The Louisiana Purchase () was the acquisition of the Louisiana (New France), territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River#Watershed, Mississipp ...
in 1803, people thought that it would take 300 years to populate it. With the introduction of the railroad, it took only 30 years. The low cost of shipping by rail resulted in the
Great American Desert
The term Great American Desert was used in the 19th century to describe the part of North America east of the Rocky Mountains to approximately the 100th meridian west, 100th meridian. It can be traced to Stephen Harriman Long, Stephen H. Long's ...
becoming the great American breadbasket.
Origins

Among the early proponents of building a railroad line that would connect the coasts of the United States was
Dr. Hartwell Carver, who in 1847 submitted to the
U.S. Congress a "Proposal for a Charter to Build a Railroad from Lake Michigan to the Pacific Ocean", seeking a congressional charter to support his idea.
[Carver's 1847 proposal records himself as having written a newspaper article on the subject in 1837. Some sources say that he wrote such an article in 1832.]
Preliminary exploration

Congress agreed to support the idea. Under the direction of the
Department of War, the
Pacific Railroad Surveys were conducted from 1853 through 1855. These included an extensive series of expeditions of the American West seeking possible routes. A report on the explorations described alternative routes and included an immense amount of information about the
American West
The Western United States (also called the American West, the Western States, the Far West, the Western territories, and the West) is census regions United States Census Bureau
As American settlement in the U.S. expanded westward, the mea ...
, covering at least . It included the region's natural history and illustrations of reptiles, amphibians, birds, and mammals.
The report did not include detailed
topographic map
In modern mapping, a topographic map or topographic sheet is a type of map characterized by large- scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but histori ...
s of potential routes needed to estimate the feasibility, cost and select the best route. However, the survey was detailed enough to determine that the best southern route lay south of the
Gila River boundary with Mexico in mostly vacant desert, through the future territories of
Arizona
Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...
and
New Mexico
New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...
. This in part motivated the United States to complete the
Gadsden Purchase.
In 1856, the Select Committee on the Pacific Railroad and Telegraph of the US House of Representatives published a report recommending support for a proposed Pacific railroad bill:
Possible routes
The U.S. Congress was strongly divided on where the eastern terminus of the railroad should be—in a southern or northern city. Three routes were considered:
* A northern route roughly along the Missouri River through present-day northern
Montana
Montana ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, an ...
to
Oregon Territory
The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the United States, Union as the Oreg ...
. This was considered impractical because of the rough terrain and extensive winter snows.
[Later, the Northern Pacific Railway (NP) found and built a better route across the northern tier of the western United States from Minnesota to the Pacific Coast. It was approved by Congress in 1864 and given nearly of land grants, which it used to raise money in Europe. Construction began in 1870 and the main line opened all the way from the ]Great Lakes
The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...
to the Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...
on September 8, 1883.
* A central route following the
Platte River in
Nebraska
Nebraska ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Ka ...
through to the
South Pass in
Wyoming
Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...
, following most of the
Oregon Trail
The Oregon Trail was a east–west, large-wheeled wagon route and Westward Expansion Trails, emigrant trail in North America that connected the Missouri River to valleys in Oregon Territory. The eastern part of the Oregon Trail crossed what ...
. Snow on this route remained a concern.
* A southern route across
Texas
Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
,
New Mexico Territory, the
Sonora desert, connecting to
Los Angeles
Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...
, California. Surveyors found during an 1848 survey that the best route lay south of the border between the United States and Mexico. This was resolved by the
Gadsden Purchase in 1853.
[The southern route was constructed in 1880 when the Southern Pacific Railroad crossed Arizona territory.]
Once the central route was chosen, it was immediately obvious that the western terminus should be Sacramento. But there was considerable difference of opinion about the eastern terminus. Three locations along of Missouri River were considered:
*
St. Joseph, Missouri, accessed via the
Hannibal and St. Joseph Railroad.
*
Kansas City, Kansas /
Leavenworth, Kansas
Leavenworth () is the county seat and largest city of Leavenworth County, Kansas, Leavenworth County, Kansas, United States. Part of the Kansas City metropolitan area, Leavenworth is located on the west bank of the Missouri River, on the site o ...
, accessed via the
Leavenworth, Pawnee and Western Railroad, controlled by
Thomas Ewing Jr. and later by
John C. Frémont.
*
Council Bluffs, Iowa /
Omaha, Nebraska
Omaha ( ) is the List of cities in Nebraska, most populous city in the U.S. state of Nebraska. It is located in the Midwestern United States along the Missouri River, about north of the mouth of the Platte River. The nation's List of United S ...
, accessed via an extension of Union Pacific financier
Thomas C. Durant's proposed
Mississippi and Missouri Railroad and the new
Union Pacific Railroad
The Union Pacific Railroad is a Railroad classes, Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United Stat ...
, also controlled by Durant.
Council Bluffs had several advantages: It was well north of the Civil War fighting in Missouri; it was the shortest route to South Pass in the Rockies in Wyoming; and it would follow a fertile river that would encourage settlement. Durant had hired the future president
Abraham Lincoln
Abraham Lincoln (February 12, 1809 – April 15, 1865) was the 16th president of the United States, serving from 1861 until Assassination of Abraham Lincoln, his assassination in 1865. He led the United States through the American Civil War ...
in 1857 when he was an attorney to represent him in a business matter about a bridge over the Missouri. Now Lincoln was responsible for choosing the eastern terminus, and he relied on Durant's counsel.
Key people
Asa Whitney
One of the most prominent champions of the central route railroad was
Asa Whitney. He envisioned a route from Chicago and the Great Lakes to northern California, paid for by the sale of land to settlers along the route. Whitney traveled widely to solicit support from businessmen and politicians, printed maps and pamphlets, and submitted several proposals to Congress, all at his own expense. In June 1845, he led a team along part of the proposed route to assess its feasibility.
Legislation to begin construction of the ''Pacific Railroad'' (called the ''Memorial of Asa Whitney'') was first introduced to Congress by Representative
Zadock Pratt. Congress did not immediately act on Whitney's proposal.
Theodore Judah
Theodore Judah was a fervent supporter of the central route railroad. He lobbied vigorously in favor of the project and undertook the survey of the route through the rugged Sierra Nevada, one of the chief obstacles of the project.
In 1852, Judah was chief engineer for the newly formed
Sacramento Valley Railroad, the first railroad built west of the
Mississippi River
The Mississippi River is the main stem, primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri River, Missouri. From its traditional source of Lake Ita ...
. Although the railroad later went bankrupt once the easy placer gold deposits around
Placerville, California, were depleted, Judah was convinced that a properly financed railroad could pass from
Sacramento
Sacramento ( or ; ; ) is the capital city of the U.S. state of California and the seat of Sacramento County. Located at the confluence of the Sacramento and American Rivers in Northern California's Sacramento Valley, Sacramento's 2020 p ...
through the Sierra Nevada mountains to reach the
Great Basin and hook up with rail lines coming from the East.
In 1856, Judah wrote a 13,000-word proposal in support of a Pacific railroad and distributed it to Cabinet secretaries, congressmen and other influential people. In September 1859, Judah was chosen to be the accredited lobbyist for the Pacific Railroad Convention, which indeed approved his plan to survey, finance and engineer the road. Judah returned to Washington in December 1859. He had a lobbying office in the
United States Capitol
The United States Capitol, often called the Capitol or the Capitol Building, is the Seat of government, seat of the United States Congress, the United States Congress, legislative branch of the Federal government of the United States, federal g ...
, received an audience with President
James Buchanan
James Buchanan Jr. ( ; April 23, 1791June 1, 1868) was the 15th president of the United States, serving from 1857 to 1861. He also served as the United States Secretary of State, secretary of state from 1845 to 1849 and represented Pennsylvan ...
, and represented the Convention before Congress.
["A Memorial and Biographical History of Northern California: Illustrated. Containing a History of This Important Section of the Pacific Coast from the Earliest Period of Its Occupancyand Biographical Mention of Many of Its Most Eminent Pioneers and Also of Prominent Citizens of Today". Chicago: Lewis Publishing Company. (1891) pp. 214–221]
Judah returned to California in 1860. He continued to search for a more practical route through the Sierra suitable for a railroad. In mid-1860, local miner Daniel Strong had surveyed a route over the Sierra for a wagon toll road, which he realized would also suit a railroad. He described his discovery in a letter to Judah. Also in 1860,
Charles Marsh, a surveyor, civil engineer and water company owner, met with civil engineer Judah. Marsh, who had already surveyed a potential railroad route between Sacramento and Nevada City, California, a decade earlier, went with Judah into the Sierra Nevada Mountains. There they examined the Henness Pass Turnpike Company's route (Marsh was a founding director of that company). They measured elevations and distances and discussed the possibility of a transcontinental railroad. Both were convinced that it could be done. Judah, Marsh and Strong then met with merchants and businessmen to solicit investors in their proposed railroad.
From January or February 1861 until July, Judah and Strong led a 10-person expedition to survey the route for the railroad over the Sierra Nevada through Clipper Gap and
Emigrant Gap, over
Donner Pass, and south to
Truckee. They discovered a way across the Sierras that was gradual enough to be made suitable for a railroad, although it still needed a lot of work.
The Big Four

Four northern California businessmen formed the
Central Pacific Railroad:
Leland Stanford
Amasa Leland Stanford (March 9, 1824June 21, 1893) was an American attorney, industrialist, philanthropist, and Republican Party (United States), Republican Party politician from Watervliet, New York. He served as the eighth governor of Calif ...
, (1824–1893), President;
Collis Potter Huntington, (1821–1900), Vice President;
Mark Hopkins, (1813–1878), Treasurer;
Charles Crocker, (1822–1888), Construction Supervisor. All became substantially wealthy from their association with the railroad. Judah, Marsh, Strong, Stanford, Huntington, Hopkins and Crocker, along with James Bailey and Lucius Anson Booth, became the first board of directors of the Central Pacific Railroad.
Thomas Durant
Former ophthalmologist Dr.
Thomas Clark "Doc" Durant was nominally only a vice president of Union Pacific, so he installed a series of respected men like
John Adams Dix as president of the railroad. While serving as vice president of Union Pacific he would be a key figure in the
Crédit Mobilier scandal which ultimately led to his removal from the company.
Grenville M. Dodge
Major General
Grenville M. Dodge served as the chief engineer of
Union Pacific
The Union Pacific Railroad is a Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United States after BNSF, ...
during the construction of the First Transcontinental Railroad. In 1865 while fighting against Native-American tribes he would discover a pass in the
Laramie Mountains, which would serve as a vital passage for the First Transcontinental Railroad. Dodge would serve in the
United States House of Representatives
The United States House of Representatives is a chamber of the Bicameralism, bicameral United States Congress; it is the lower house, with the U.S. Senate being the upper house. Together, the House and Senate have the authority under Artic ...
for
Iowa's 5th District from 1867 until 1869. During this time he would push for legislation to help the construction of the railroad.
Authorization and funding
In February 1860, Iowa Representative
Samuel Curtis introduced a bill to fund the railroad. It passed the
House
A house is a single-unit residential building. It may range in complexity from a rudimentary hut to a complex structure of wood, masonry, concrete or other material, outfitted with plumbing, electrical, and heating, ventilation, and air c ...
but died when it could not be reconciled with the Senate version because of opposition from southern states who wanted a southern route near the
42nd parallel.
Curtis tried and failed again in 1861. After the southern states seceded from the Union, the House of Representatives approved the bill on May 6, 1862, and the Senate on June 20. Lincoln signed the
Pacific Railroad Act of 1862 into law on July 1. It authorized creation of two companies, the
Central Pacific in the west and the
Union Pacific
The Union Pacific Railroad is a Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United States after BNSF, ...
in the mid-west, to build the railroad. The legislation called for building and operating a new railroad from the Missouri River at
Council Bluffs, Iowa, west to
Sacramento, California
Sacramento ( or ; ; ) is the List of capitals in the United States, capital city of the U.S. state of California and the county seat, seat of Sacramento County, California, Sacramento County. Located at the confluence of the Sacramento Rive ...
, and on to
San Francisco Bay
San Francisco Bay (Chochenyo language, Chochenyo: 'ommu) is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, California, San ...
. Another act to supplement the first was passed in 1864. The
Pacific Railroad Act of 1863 established the
standard gauge
A standard-gauge railway is a railway with a track gauge of . The standard gauge is also called Stephenson gauge (after George Stephenson), international gauge, UIC gauge, uniform gauge, normal gauge in Europe, and SGR in East Africa. It is the ...
to be used in these federally financed railways.
Federal financing
To finance the project, the act authorized the federal government to issue 30-year U.S.
government bond
A government bond or sovereign bond is a form of Bond (finance), bond issued by a government to support government spending, public spending. It generally includes a commitment to pay periodic interest, called Coupon (finance), coupon payments' ...
s (at 6% interest). The railroad companies were paid $16,000 per mile (approximately $ per mile today) for track laid on a level grade, $32,000 per mile (about $ per mile today) for track laid in foothills, and $48,000 per mile (or about $ per mile today) for track laid in mountains. The two railroad companies sold similar amounts of company-backed bonds and stock.
Union Pacific financing
While the federal legislation for the Union Pacific required that no partner was to own more than 10 percent of the stock, the Union Pacific had problems selling its stock. One of the few subscribers was
the Church of Jesus Christ of Latter-day Saints
The Church of Jesus Christ of Latter-day Saints, informally known as the LDS Church or Mormon Church, is a Nontrinitarianism, nontrinitarian Restorationism, restorationist Christianity, Christian Christian denomination, denomination and the ...
leader
Brigham Young
Brigham Young ( ; June 1, 1801August 29, 1877) was an American religious leader and politician. He was the second President of the Church (LDS Church), president of the Church of Jesus Christ of Latter-day Saints (LDS Church) from 1847 until h ...
, who also supplied crews for building much of the railroad through Utah.
Durant manipulated market prices on his stocks by spreading rumors about which railroads he had an interest in were being considered for connection with the Union Pacific. First he touted rumors that his fledgling M&M Railroad had a deal in the works, while secretly buying stock in the depressed
Cedar Rapids and Missouri Railroad. Then he circulated rumors that the CR&M had plans to connect to the Union Pacific, at which point he began buying back the M&M stock at depressed prices. It is estimated his scams produced over $5 million in profits for him and his cohorts.
Central Pacific financing
Collis Huntington, a Sacramento
hardware merchant, heard Judah's presentation about the railroad at the St. Charles Hotel in November 1860. He invited Judah to his office to hear his proposal in detail. Huntington persuaded Judah to accept financing from himself and four others:
Mark Hopkins, his business partner; James Bailey, a jeweler;
Leland Stanford
Amasa Leland Stanford (March 9, 1824June 21, 1893) was an American attorney, industrialist, philanthropist, and Republican Party (United States), Republican Party politician from Watervliet, New York. He served as the eighth governor of Calif ...
, a grocer; and
Charles Crocker, a dry-goods merchant. They initially invested $1,500 each and formed a board of directors. These investors became known as
The Big Four, and their railroad was called the
Central Pacific Railroad. Each eventually made millions of dollars from their investments and control of the Central Pacific Railroad.
Before major construction could begin, Judah traveled back to New York City to raise funds to buy out The Big Four. Shortly after arriving in New York, Judah died on November 2, 1863, of
yellow fever that he had contracted while traveling over the
Panama Railroad's transit of the
Isthmus of Panama
The Isthmus of Panama, historically known as the Isthmus of Darien, is the narrow strip of land that lies between the Caribbean Sea and the Pacific Ocean, linking North America, North and South America. The country of Panama is located on the i ...
. The CPRR Engineering Department was taken over by his successor Samuel S. Montegue, as well as Canadian trained Chief Assistant Engineer (later Acting Chief Engineer) Lewis Metzler Clement who also became Superintendent of Track.
Land grants
To allow the companies to raise additional capital, Congress granted the railroads a
right-of-way corridor, lands for additional facilities like sidings and maintenance yards. They were also granted alternate
sections of government-owned lands— per mile (1.6 km)—for on both sides of the track, forming a
checkerboard pattern. The railroad companies were given the odd-numbered sections while the federal government retained the even-numbered sections. The exception was in cities, at rivers, or on non-government property.
The railroads sold bonds based on the value of the lands, and in areas with good land like the Sacramento Valley and Nebraska sold the land to settlers, contributing to a rapid settlement of the West. The total area of the land grants to the Union Pacific and Central Pacific was larger than the area of the state of Texas: federal government land grants totaled about 130,000,000 acres, and state government land grants totaled about 50,000,000 acres.
It was far from a given that the railroads operating in the thinly-settled west would make enough money to repay their construction and operation. If the railroad companies failed to sell the land granted them within three years, they were required to sell it at prevailing government price for homesteads: . If they failed to repay the bonds, all remaining railroad property, including trains and tracks, would revert to the U.S. government. To encourage settlement in the west,
Congress
A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...
(1861–1863) passed the
Homestead Acts which granted an applicant of land with the requirement that the applicant improve the land. This incentive encouraged thousands of settlers to move west.
In return for the land grants, the railroads were required to haul government personnel and cargo at significantly reduced rates (generally half of the normal rate). In addition, the land was granted in a checkerboard fashion, with the government retaining every other section. The land that the government retained typically doubled in value as a result of the railroad being built. The land grants were a good deal for the government.
The government guaranteed loans to several Pacific railroads, which were all paid off by 1899 ($63 million in principal, and $105 million in interest). After receiving rate discounts of approximately 50% on government personnel and cargo for 80 years (including during two world wars), Congress finally discontinued the rate reductions at the end of World War II. The land grants had been more than paid for (several times over).
Railroad self-dealing
The federal legislation lacked adequate oversight and accountability. The two companies took advantage of these weaknesses in the legislation to manipulate the project and produce extra profit for themselves. Despite the generous subsidies offered by the federal government, the railroad capitalists knew they would not turn a profit on the railroad business for many months, possibly years. They determined to make a profit on the construction itself. Both groups of financiers formed independent companies to complete the project, and they controlled management of the new companies along with the railroad ventures. This self-dealing allowed them to build in generous profit margins paid out by the railroad companies. In the west, the four men heading the Central Pacific chose a simple name for their company, the "Contract and Finance Company." In the east, the Union Pacific selected a foreign name, calling their construction firm "Crédit Mobilier of America."
The latter company was later implicated in a far-reaching scandal which would greatly affect the railroad's purpose, described later.
Also, the lack of federal oversight provided both companies with incentives to continue building their railroads past one other, since they were each being paid, and receiving land grants, based on how many miles of track they laid, even though only one track would eventually be used. This tacitly-agreed profiteering activity was captured (probably accidentally) by Union Pacific photographer
Andrew J. Russell in his images of the Promontory Trestle construction.
Labor and wages
Many of the
civil engineer
A civil engineer is a person who practices civil engineering – the application of planning, designing, constructing, maintaining, and operating infrastructure while protecting the public and environmental health, as well as improving existing i ...
s and surveyors who were hired by the Union Pacific had been employed during the
American Civil War
The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
to repair and operate the over of railroad line the
U.S. Military Railroad controlled by the end of the war. The Union Pacific also utilized their experience repairing and building
truss bridge
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements, typically straight, may be stressed from tension, compression, or ...
s during the war. Most of the semi-skilled workers on the Union Pacific were recruited from the many soldiers discharged from the
Union and
Confederate armies along with emigrant
Irishmen.

After 1864, the Central Pacific Railroad received the same Federal financial incentives as the Union Pacific Railroad, along with some construction bonds granted by the state of California and the city of San Francisco. The Central Pacific hired some Canadian and European civil engineers and surveyors with extensive experience building railroads, but it had a difficult time finding semi-skilled labor. Most Caucasians in California preferred to work in the mines or agriculture. The railroad experimented by hiring local emigrant Chinese as manual laborers, many of whom were escaping the poverty and terrors of the war (especially the
Punti–Hakka Clan Wars) in the
Sze Yup districts in the
Pearl River Delta
The Pearl River Delta Metropolitan Region is the low-lying area surrounding the Pearl River estuary, where the Pearl River flows into the South China Sea. Referred to as the Guangdong–Hong Kong–Macao Greater Bay Area in official documents, ...
of
Guangdong
) means "wide" or "vast", and has been associated with the region since the creation of Guang Prefecture in AD 226. The name "''Guang''" ultimately came from Guangxin ( zh, labels=no, first=t, t= , s=广信), an outpost established in Han dynasty ...
province in China.
When they proved themselves as workers, the CPRR from that point forward preferred to hire Chinese, and even set up recruiting efforts in
Canton.
Despite their small stature and lack of experience, the Chinese laborers were responsible for most of the heavy manual labor since only a very limited amount of that work could be done by animals, simple machines, or black powder. The railroad also hired some
black people
Black is a racial classification of people, usually a political and skin color-based category for specific populations with a mid- to dark brown complexion. Not all people considered "black" have dark skin and often additional phenotypical ...
escaping the aftermath of the American Civil War. Most of the
black
Black is a color that results from the absence or complete absorption of visible light. It is an achromatic color, without chroma, like white and grey. It is often used symbolically or figuratively to represent darkness.Eva Heller, ''P ...
and white workers were paid $30 per month and given food and lodging. Most Chinese were initially paid $31 per month and provided lodging, but they preferred to cook their own meals. In 1867 the CPRR raised their wage to $35 (equivalent to $ in ) per month after a strike.
CPRR came to see the advantage of good workers employed at low wages: "Chinese labor proved to be Central Pacific's salvation."
Transcontinental route
Construction begun
The Central Pacific broke ground on January 8, 1863. Because of insufficient transportation alternatives from the manufacturing centers on the east coast, virtually all of their tools and machinery including rails,
railroad switches,
railroad turntables,
freight
In transportation, cargo refers to goods transported by land, water or air, while freight refers to its conveyance. In economics, freight refers to goods transported at a freight rate for commercial gain. The term cargo is also used in ...
and passenger cars, and
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
s were transported first by train to east coast ports. They were then loaded on ships which either sailed around South America's
Cape Horn, or offloaded the cargo at the
Isthmus of Panama
The Isthmus of Panama, historically known as the Isthmus of Darien, is the narrow strip of land that lies between the Caribbean Sea and the Pacific Ocean, linking North America, North and South America. The country of Panama is located on the i ...
, where it was sent across via
paddle steamer
A paddle steamer is a steamship or steamboat powered by a steam engine driving paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, whereby the first uses were wh ...
and the
Panama Railroad. The Panama Railroad gauge was , which was incompatible with the gauge used by the CPRR equipment. The latter route was about twice as expensive per pound. Once the machinery and tools reached the
San Francisco Bay
San Francisco Bay (Chochenyo language, Chochenyo: 'ommu) is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, California, San ...
area, they were put aboard river paddle steamers which transported them up the final of the
Sacramento River to the new state capital in
Sacramento
Sacramento ( or ; ; ) is the capital city of the U.S. state of California and the seat of Sacramento County. Located at the confluence of the Sacramento and American Rivers in Northern California's Sacramento Valley, Sacramento's 2020 p ...
. Many of these steam engines, railroad cars, and other machinery were shipped dismantled and had to be reassembled. Wooden timbers for railroad ties, trestles, bridges, firewood, and telegraph poles were harvested in California and transported to the project site.
The Union Pacific Railroad did not start construction for another 18 months until July 1865. They were delayed by difficulties obtaining financial backing and the unavailability of workers and materials due to the Civil War. Their start point in the new city of
Omaha, Nebraska
Omaha ( ) is the List of cities in Nebraska, most populous city in the U.S. state of Nebraska. It is located in the Midwestern United States along the Missouri River, about north of the mouth of the Platte River. The nation's List of United S ...
, was not yet connected via railroad to
Council Bluffs, Iowa. Equipment needed to begin work was initially delivered to Omaha and Council Bluffs by paddle steamers on the
Missouri River
The Missouri River is a river in the Central United States, Central and Mountain states, Mountain West regions of the United States. The nation's longest, it rises in the eastern Centennial Mountains of the Bitterroot Range of the Rocky Moun ...
. The Union Pacific was so slow in beginning construction during 1865 that they sold two of the four steam locomotives they had purchased.
After the
American Civil War
The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
ended in 1865, the Union Pacific still competed for railroad supplies with companies who were building or repairing railroads in the south, and prices rose.
Rail standards
At that time in the United States, there were two primary standards for track gauge, as defined by the distance between the two rails. In Britain, the gauge was , and this had been adopted by the majority of northern railways. However, much of the south had adopted a gauge. Transferring railway cars across a
break of gauge
With railways, a break of gauge occurs where a line of one track gauge (the distance between the rails, or between the wheels of trains designed to run on those rails) meets a line of a different gauge. Trains and railroad car, rolling stock g ...
required
changing out the
trucks
A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construction ...
. Alternatively, cargo was
offloaded and reloaded, a time-consuming effort that delayed cargo shipments. For the transcontinental railroad, the builders adopted what is now known as the
standard gauge
A standard-gauge railway is a railway with a track gauge of . The standard gauge is also called Stephenson gauge (after George Stephenson), international gauge, UIC gauge, uniform gauge, normal gauge in Europe, and SGR in East Africa. It is the ...
.
The
Bessemer process
The Bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace. The key principle is steelmaking, removal of impurities and undesired eleme ...
and
open hearth furnace steel-making were in use by 1865, but the advantages of steel rails which lasted much longer than iron rails had not yet been demonstrated. The
rails
Rail or rails may refer to:
Rail transport
*Rail transport and related matters
* Railway track or railway lines, the running surface of a railway
Arts and media Film
* ''Rails'' (film), a 1929 Italian film by Mario Camerini
* ''Rail'' (1967 fi ...
used initially in building the railway were nearly all made of an
iron
Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...
flat-bottomed modified
I-beam
An I-beam is any of various structural members with an - (serif capital letter 'I') or H-shaped cross section (geometry), cross-section. Technical terms for similar items include H-beam, I-profile, universal column (UC), w-beam (for "wide flang ...
profile weighing . The railroad companies were intent on completing the project as rapidly as possible at a minimum cost. Within a few years, nearly all railroads converted to
steel rails.
Time zones and telegraph usage
Time was not standardized across the United States and Canada until November 18, 1883. In 1865, each railroad set its own time to minimize scheduling errors. To communicate easily up and down the line, the railroads built telegraph lines alongside the tracks. These lines eventually superseded the original
First Transcontinental Telegraph which followed much of the
Mormon Trail up the
North Platte River and across the very thinly populated
Central Nevada Route through central Utah and Nevada. The telegraph lines along the railroad were easier to protect and maintain. Many of the original telegraph lines were abandoned as the telegraph business was consolidated with the railroad telegraph lines.
Union Pacific route

The Union Pacific's of track started at MP 0.0 in
Council Bluffs, Iowa,
on the eastern side of the
Missouri River
The Missouri River is a river in the Central United States, Central and Mountain states, Mountain West regions of the United States. The nation's longest, it rises in the eastern Centennial Mountains of the Bitterroot Range of the Rocky Moun ...
. Omaha was chosen by
President Abraham Lincoln
Abraham Lincoln (February 12, 1809 – April 15, 1865) was the 16th president of the United States, serving from 1861 until Assassination of Abraham Lincoln, his assassination in 1865. He led the United States through the American Civil War ...
as the location of its Transfer Depot where up to seven railroads could transfer mail and other goods to Union Pacific trains bound for the west.
Trains were initially transported across the Missouri River by ferry before they could access the western tracks beginning in
Omaha
Omaha ( ) is the List of cities in Nebraska, most populous city in the U.S. state of Nebraska. It is located in the Midwestern United States along the Missouri River, about north of the mouth of the Platte River. The nation's List of United S ...
,
Nebraska Territory. The river froze in the winter, and the ferries were replaced by sleighs. A bridge was not built until 1872, when the
Union Pacific Missouri River Bridge was completed.
After the rail line's initial climb through the Missouri River bluffs west of Omaha and out of the
Missouri River
The Missouri River is a river in the Central United States, Central and Mountain states, Mountain West regions of the United States. The nation's longest, it rises in the eastern Centennial Mountains of the Bitterroot Range of the Rocky Moun ...
Valley, the route bridged the
Elkhorn River and then crossed over the new
Loup River bridge as it followed the north side of the
Platte River valley west through Nebraska along the general path of the
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...
,
Mormon and
California Trails.
By December 1865, the Union Pacific had only completed of track, reaching
Fremont, Nebraska, and a further of roadbed.
At the end of 1865, Peter A. Dey, Chief Engineer of the Union Pacific, resigned over a routing dispute with
Thomas C. Durant, one of the chief financiers of the Union Pacific.
With the end of the Civil War and increased government supervision in the offing, Durant hired his former M&M engineer
Grenville M. Dodge to build the railroad, and the Union Pacific began a mad dash west.
Former Union General
John "Jack" Casement was hired as the new Chief Engineer of the Union Pacific. He equipped several railroad cars to serve as portable bunkhouses for the workers and gathered men and supplies to push the railroad rapidly west. Among the bunkhouses, Casement added a galley car to prepare meals, and he even provided for a herd of cows to be moved with the railhead and bunk cars to provide fresh meat. Hunters were hired to provide
buffalo meat from the large herds of American bison.
The small survey parties who scouted ahead to locate the roadbed were sometimes attacked and killed by raiding Native Americans. In response, the U.S. Army instituted active cavalry patrols that grew larger as the Native Americans grew more aggressive. Temporary, "
Hell on wheels" towns, made mostly of canvas tents, accompanied the railroad as construction headed west.
The
Platte River was too shallow and meandering to provide river transport, but the Platte river valley headed west and sloped up gradually at about , often allowing to lay a mile (1.6 km) of track a day or more in 1866 as the Union Pacific finally started moving rapidly west. Building bridges to cross creeks and rivers was the main source of delays. Near where the
Platte River splits into the
North Platte River and
South Platte River
The South Platte River is one of the two principal tributaries of the Platte River. Flowing through the U.S. states of Colorado and Nebraska, it is itself a major river of the American Midwestern United States, Midwest and the American Sou ...
, the railroad bridged the North Platte River over a bridge (nicknamed ½ mile bridge). It was built across the shallow but wide North Platte resting on piles driven by steam
pile drivers. Here they built the "railroad" town of
North Platte, Nebraska, in December 1866 after completing about of track that year. In late 1866, former
Major General Grenville M. Dodge was appointed Chief Engineer on the Union Pacific, but hard-working General "Jack" Casement continued to work as chief construction "boss" and his brother Daniel Casement continued as a financial officer.
The original emigrant route across Wyoming of the Oregon, Mormon and California Trails, after progressing up the
Platte River valley, went up the
North Platte River valley through
Casper, Wyoming
Casper is a city in and the county seat of Natrona County, Wyoming, United States. Casper is the List of municipalities in Wyoming, second-most populous city in the state after Cheyenne, Wyoming, Cheyenne, with the population at 59,038 as of th ...
, along the
Sweetwater River and over the
Continental Divide at the
South Pass. The original westward travelers in their ox and mule pulled wagons tried to stick to river valleys to avoid as much road building as possible—gradients and sharp corners were usually of little or no concern to them. The ox and mule pulled wagons were the original off-road vehicles in their day since nearly all of the
Emigrant Trails went cross country over rough, unimproved trails. The route over South Pass's main advantage for wagons pulled by oxen or mules was a shorter elevation over an "easy" pass to cross and its "easy" connection to nearby river valleys on both sides of the continental divide for water and grass. The emigrant trails were closed in winter. The North Platte–South Pass route was far less beneficial for a railroad, as it was about longer and much more expensive to construct up the narrow, steep and rocky canyons of the North Platte. The route along the North Platte was also further from
Denver, Colorado
Denver ( ) is a List of municipalities in Colorado#Consolidated city and county, consolidated city and county, the List of capitals in the United States, capital and List of municipalities in Colorado, most populous city of the U.S. state of ...
, and went across difficult terrain, while a railroad connection to that City was already being planned for and surveyed.
Efforts to survey a new, shorter, "better" route had been underway since 1864. By 1867, a new route was found and surveyed that went along part of the
South Platte River
The South Platte River is one of the two principal tributaries of the Platte River. Flowing through the U.S. states of Colorado and Nebraska, it is itself a major river of the American Midwestern United States, Midwest and the American Sou ...
in western Nebraska and after entering what is now the state of
Wyoming
Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...
, ascended a gradual sloping ridge between
Lodgepole Creek and
Crow Creek to the
Evans pass (also called Sherman's Pass) which was discovered by the Union Pacific employed English surveyor and engineer, James Evans, in about 1864. This pass now is marked by the
Ames Monument () marking its significance and commemorating two of the main backers of the Union Pacific Railroad. From North Platte, Nebraska (elevation ), the railroad proceeded westward and upward along a new path across the
Nebraska Territory and
Wyoming Territory (then part of the
Dakota Territory) along the north bank of the
South Platte River
The South Platte River is one of the two principal tributaries of the Platte River. Flowing through the U.S. states of Colorado and Nebraska, it is itself a major river of the American Midwestern United States, Midwest and the American Sou ...
and into what would become the state of Wyoming at Lone Pine, Wyoming. Evans Pass was located between what would become the new "railroad" towns of
Cheyenne and
Laramie. Connecting to this pass, about west of Cheyenne, was the one place across the
Laramie Mountains that had a narrow "guitar neck" of land that crossed the mountains without serious erosion at the so-called "gangplank" () discovered by
Major General Grenville Dodge in 1865 when he was in the U.S. Army. The new route surveyed across Wyoming was over shorter, had a flatter profile, allowing for cheaper and easier railroad construction, and also went closer by Denver and the known coalfields in the
Wasatch and
Laramie Ranges.
The railroad gained about in the climb to Cheyenne from North Platte, Nebraska—about —a very gentle slope of less than one degree average. This "new" route had never become an emigrant route because it lacked the water and grass to feed the emigrants' oxen and mules. Steam locomotives did not need grass, and the railroad companies could drill wells for water if necessary.
Coal had been discovered in Wyoming and reported on by
John C. Frémont in his 1843 expedition across Wyoming, and was already being exploited by Utah residents from towns like
Coalville, Utah, and later
Kemmerer, Wyoming, by the time the Transcontinental railroad was built. Union Pacific needed coal to fuel its
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
s on the almost treeless plains across Nebraska and Wyoming. Coal shipments by rail were also looked on as a potentially major source of income—this potential is still being realized.

The Union Pacific reached the new railroad town of Cheyenne in December 1867, having laid about that year. They paused over the winter, preparing to push the track over Evans (Sherman's) Pass. At , Evans Pass was the highest point reached on the transcontinental railroad. About beyond Evans pass, the railroad had to build an extensive bridge over the Dale Creek canyon (). The
Dale Creek Crossing was one of their more difficult railroad engineering challenges. Dale Creek Bridge was long and above Dale Creek.
The bridge components were pre-built of timber in
Chicago, Illinois
Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...
, and then shipped on rail cars to Dale Creek for assembly. The eastern and western approaches to the bridge site, near the highest
elevation
The elevation of a geographic location (geography), ''location'' is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational equipotenti ...
on the transcontinental railroad, required cutting through granite for nearly a mile on each side. The initial Dale Creek bridge had a train speed limit of per hour across the bridge. Beyond Dale Creek, railroad construction paused at what became the town of
Laramie, Wyoming
Laramie () is a List of municipalities in Wyoming, city in and the county seat of Albany County, Wyoming, United States, known for its high elevation at , for its railroad history, and as the home of the University of Wyoming. The population wa ...
, to build a bridge across the
Laramie River.
Located from Evans pass, Union Pacific connected the new "railroad" town of Cheyenne to Denver and its
Denver Pacific Railway and Telegraph Company railroad line in 1870. Elevated above sea level, and sitting on the new Union Pacific route with a connection to Denver, Cheyenne was chosen to become a major railroad center and was equipped with extensive railroad yards, maintenance facilities, and a Union Pacific presence. Its location made it a good base for
helper locomotives to couple to trains with
snowplows to help clear the tracks of snow or help haul heavy freight over Evans pass. The Union Pacific's junction with the Denver Railroad with its connection to
Kansas City, Kansas,
Kansas City, Missouri
Kansas City, Missouri, abbreviated KC or KCMO, is the largest city in the U.S. state of Missouri by List of cities in Missouri, population and area. The city lies within Jackson County, Missouri, Jackson, Clay County, Missouri, Clay, and Pl ...
, and the railroads east of the Missouri River again increased Cheyenne's importance as the junction of two major railroads. Cheyenne later became Wyoming's largest city and the capital of the new state of Wyoming.
The railroad established many townships along the way:
Fremont,
Elkhorn,
Grand Island,
North Platte,
Ogallala and
Sidney as the railroad followed the Platte River across Nebraska territory. The railroad even dipped into what would become the new state of
Colorado
Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
after crossing the North Platte River as it followed the
South Platte River
The South Platte River is one of the two principal tributaries of the Platte River. Flowing through the U.S. states of Colorado and Nebraska, it is itself a major river of the American Midwestern United States, Midwest and the American Sou ...
west into what would become
Julesburg before turning northwest along Lodgepole Creek into Wyoming. In the
Dakota Territory (Wyoming) the new towns of
Cheyenne,
Laramie,
Rawlins (named for
Union General
John Aaron Rawlins, who camped in the locality in 1867),
Green River and
Evanston (named after James Evans) were established, as well as much more fuel and water stops. The
Green River was crossed with a new bridge, and the new "railroad" town of Green River constructed there after the tracks reached the Green River on October 1, 1868—the last big river to cross.
On December 4, 1868, the Union Pacific reached Evanston, having laid almost of track over the Green River and the
Laramie Plains that year. By 1871, Evanston became a significant maintenance shop town equipped to carry out extensive repairs on the cars and steam locomotives.
In the
Utah Territory, the railroad once again diverted from the main emigrant trails to cross the
Wasatch Mountains and went down the rugged Echo Canyon (Summit County, Utah) and
Weber River
The Weber River ( ) (Shoshone: Ho-o-pah) is a long river of northern Utah, United States. It begins in the northwest of the Uinta Mountains and empties into the Great Salt Lake. The Weber River was named for American fur trapper John Henr ...
canyon. To speed up construction as much as possible, Union Pacific contracted several thousand Mormon workers to cut, fill, trestle, bridge, blast and tunnel its way down the rugged Weber River Canyon to
Ogden, Utah, ahead of the railroad construction. The Mormon and Union Pacific rail work was joined in the area of the present-day border between Utah and Wyoming.
[Mormon workers on Union Pacific transcontinental track]
accessed August 2, 2013. The longest of four tunnels built in Weber Canyon was Tunnel 2. Work on this tunnel started in October 1868 and was completed six months later. Temporary tracks were laid around it and Tunnels 3 (), 4 () and 5 () to continue work on the tracks west of the tunnels.
The tunnels were all made with the new dangerous
nitroglycerine explosive, which expedited work but caused some fatal accidents. While building the railroad along the rugged Weber River Canyon, Mormon workers signed the
Thousand Mile Tree which was a lone tree alongside the track from Omaha. A historic marker has been placed there.
The tracks reached
Ogden, Utah, on March 8, 1869, although finishing work would continue on the tracks, tunnels and bridges in Weber Canyon for over a year. From Ogden, the railroad went north of the
Great Salt Lake to
Brigham City and
Corinne using Mormon workers, before finally connecting with the
Central Pacific Railroad at Promontory Summit in Utah territory on May 10, 1869.
Some Union Pacific officers declined to pay the Mormons all of the agreed upon construction costs of the work through Weber Canyon, and beyond, claiming Union Pacific poverty despite the millions they had extracted through the
Crédit Mobilier of America scandal. Only partial payment was secured through court actions against Union Pacific.
Central Pacific route
The Central Pacific laid of track, starting in Sacramento, California, in 1863 and continuing over the rugged
Sierra Nevada
The Sierra Nevada ( ) is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primari ...
mountains at
Donner Pass into the new state of Nevada. The elevation change from Sacramento (elev. ) to
Donner Summit (elev. ) had to be accomplished in about with an average elevation change of 76 feet per mile (14 meters per km), and there were only a few places in the Sierra where this type of "ramp" existed. The discovery and detailed map survey with profiles and elevations of this route over the Sierra Nevada is credited to
Theodore Judah, chief engineer of the Central Pacific Railroad until his death in 1863. This route is up a ridge between the North fork of the
American River
The American River is a List of rivers of California, river in California that runs from the Sierra Nevada (U.S.), Sierra Nevada mountain range to its confluence with the Sacramento River in downtown Sacramento. Via the Sacramento River, it ...
on the south and
Bear
Bears are carnivoran mammals of the family (biology), family Ursidae (). They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats ...
and
South Yuba Rivers on the north. As the railroad climbed out of Sacramento up to Donner Summit, there was only one section near "Cape Horn CPRR" where the railroad grade slightly exceeded two percent.

In June 1864, the Central Pacific railroad entrepreneurs opened Dutch Flat and Donner Lake Wagon Road (DFDLWR). Costing about $300,000 and a years worth of work, this toll road wagon route was opened over much of the route the Central Pacific railroad (CPRR) would use over Donner Summit to carry freight and passengers needed by the CPRR and to carry other cargo over their toll road to and from the ever-advancing railhead and over the Sierra to the gold and silver mining towns of Nevada. As the railroad advanced, their freight rates with the combined rail and wagon shipments would become much more competitive. The volume of the toll road freight traffic to Nevada was estimated to be about $13,000,000 a year as the
Comstock Lode boomed, and getting even part of this freight traffic would help pay for the railroad construction. When the railroad reached Reno, it had the majority of all Nevada freight shipments, and the price of goods in Nevada dropped significantly as the freight charges to Nevada dropped significantly. The rail route over the Sierras followed the general route of the Truckee branch of the
California Trail, going east over Donner Pass and down the rugged
Truckee River
The Truckee River is a river in the U.S. states of California and Nevada. The river flows northeasterly and is long.U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed October 20, 2012 Th ...
valley.
The route over the Sierra had been plotted out by Judah in preliminary surveys before his death in 1863. Judah's deputy,
Samuel S. Montague was appointed as Central Pacific's new Chief Engineer, with Lewis M. Clement as Assistant Chief Engineer and Charles Cadwalader as second assistant. To build the new railroad, detailed surveys had to be run that showed where the cuts, fills, trestles, bridges and tunnels would have to be built. Work that was identified as taking a long time was started as soon as its projected track location could be ascertained and work crews, supplies and road work equipment found to be sent ahead. Tunnels, trestles and bridges were nearly all built this way. The spread-out nature of the work resulted in the work being split into two divisions, with L. M. Clement taking the upper division from Blue Cañon to Truckee and Cadwalader taking the lower division from Truckee to the Nevada border. Other assistant engineers were assigned to specific tasks such as building a bridge, tunnel or trestle which was done by the workers under experienced supervisors.
In total, the Central Pacific had eleven tunnel projects (Nos. 3 through 13) under construction in the Sierra from 1865 to 1868, with seven tunnels located in a stretch on the east side of Donner Summit. The tunnels were usually built by drilling a series of holes in the tunnel face, filling them with black powder and detonating it to break the rock free. The black powder was provided by the California Powder Works near
Santa Cruz, California
Santa Cruz (Spanish language, Spanish for "Holy Cross") is the largest city and the county seat of Santa Cruz County, California, Santa Cruz County, in Northern California. As of the 2020 United States census, 2020 census, the city population ...
. These works had started production in 1864 after the
American Civil War
The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
had cut off shipments of black powder from the East to the mining and railroad industry of California and Nevada. The Central Pacific was a prolific user of black powder, often using up to 500 kegs of per day.
The summit tunnel (Number 6), , was started in late 1865, well ahead of the railhead. Through solid granite, the summit tunnel progressed at a rate of only about per day per face as it was being worked by three eight-hour shifts of workers, hand drilling holes with a rock drill and hammer, filling them with black powder and trying to blast the granite loose. One crew worked drilling holes on the faces and another crew collected and removed the loosened rock after each explosion. The workers were pulled off the summit tunnel and the track grading east of Donner Pass in the winter of 1865–1866 as there was no way to supply them, nor quarters they could have lived in. The crews were transferred to work on bridges and track grading on the Truckee River canyon.

In 1866, they put in a vertical shaft in the center of the summit tunnel and started work towards the east and west tunnel faces, giving four working faces on the summit tunnel to speed up progress. A steam engine off an old locomotive was brought up with much effort over the wagon road and used as a winch driver to help remove loosened rock from the vertical shaft and two working faces. By the winter of 1866–67, work had progressed sufficiently and a camp had been built for workers on the summit tunnel which allowed work to continue. The cross section of a tunnel face was a , oval with an vertical wall. Progress on the tunnel sped up to over per day per face when they started using the newly invented
nitroglycerin
Nitroglycerin (NG) (alternative spelling nitroglycerine), also known as trinitroglycerol (TNG), nitro, glyceryl trinitrate (GTN), or 1,2,3-trinitroxypropane, is a dense, colorless or pale yellow, oily, explosive liquid most commonly produced by ...
—manufactured near the tunnel. They used nitroglycerin to deepen the summit tunnel to the required height after the four tunnel faces met, and made even faster progress. Nearly all other tunnels were worked on both tunnel faces and met in the middle. Depending on the material the tunnels penetrated, they were left unlined or lined with brick, rock walls or timber and post. Some tunnels were designed to bend in the middle to align with the track bed curvature. Despite this potential complication, nearly all the different tunnel center lines met within or so. The detailed survey work that made these tunnel digs as precise as required was nearly all done by the Canadian-born and -trained Lewis Clement, the CPRR's Chief Assistant Engineer and Superintendent of Track, and his assistants.
[Cooper, Bruce C]
Lewis Metzler Clement: A Pioneer of the Central Pacific Railroad
The Central Pacific Photographic History Museum.
Hills or ridges in front of the railroad road bed would have to have a flat-bottomed, V-shaped "cut" made to get the railroad through the ridge or hill. The type of material determined the slope of the V and how much material would have to be removed. Ideally, these cuts would be matched with valley fills that could use the dug out material to bring the road bed up to grade—
cut and fill construction. In the 1860s there was no heavy equipment that could be used to make these cuts or haul it away to make the fills. The options were to dig it out by pick and shovel, haul the hillside material by
wheelbarrow and/or horse or mule cart or blast it loose. To blast a V-shaped cut out, they had to drill several holes up to deep in the material, fill them with black powder, and blast the material away. Since the Central Pacific was in a hurry, they were profligate users of black powder to blast their way through the hills. The only disadvantage came when a nearby valley needed fill to get across it. The explosive technique often blew most of the potential fill material down the hillside, making it unavailable for fill. Initially, many valleys were bridged by "temporary" trestles that could be rapidly built and were later replaced by much lower maintenance and permanent solid fill. The existing railroad made transporting and putting material in valleys much easier—load it on railway dump cars, haul where needed and dump it over the side of the trestle.

The route down the eastern Sierras was done on the south side of
Donner Lake with a series of switchbacks carved into the mountain. The Truckee River, which drains
Lake Tahoe
Lake Tahoe (; Washo language, Washo: ''dáʔaw'') is a Fresh water, freshwater lake in the Sierra Nevada of the Western United States, straddling the border between California and Nevada. Lying at above sea level, Lake Tahoe is the largest a ...
, had already found and scoured out the best route across the
Carson Range of mountains east of the Sierras. The route down the rugged Truckee River Canyon, including required bridges, was done ahead of the main summit tunnel completion. To expedite the building of the railroad through the Truckee River canyon, the Central Pacific hauled two small locomotives,
railcar
A railcar (not to be confused with the generic term railroad car or railway car) is a self-propelled railway vehicle designed to transport passengers. The term "railcar" is usually used in reference to a train consisting of a single coa ...
s, rails and other material on wagons and sleighs to what is now
Truckee, California, and worked the winter of 1867–68 on their way down Truckee canyon ahead of the tracks being completed to Truckee. This feat was dramatized in John Ford's film ''The Iron Horse'' with one of Central Pacific's actual locomotives,
C.P. Huntington. In Truckee canyon, five
Howe truss bridges had to be built. This gave them a head start on getting to the "easy" miles across Nevada.
In order to keep the higher portions of the Sierra grade open in the winter, of timber
snow sheds were built between Blue Cañon and Truckee in addition to utilizing
snowplows pushed by locomotives, as well as manual shovelling. With the advent of more efficient oil fired steam and later diesel electric power to drive plows, flangers, spreaders, and rotary snow plows, most of the wooden snowsheds have long since been removed as obsolete. Tunnels 1–5 and Tunnel 13 of the original 1860s tunnels on Track 1 of the Sierra grade remain in use today, while additional new tunnels were later driven when the grade was double tracked over the first quarter of the twentieth century. In 1993, the
Southern Pacific Railroad
The Southern Pacific (or Espee from the railroad initials) was an American Railroad classes#Class I, Class I Rail transport, railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was oper ...
(which operated the CPRR-built
Oakland–
Ogden line until its 1996 merger with the
Union Pacific
The Union Pacific Railroad is a Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United States after BNSF, ...
) closed and pulled up the section of Track #1 over the summit running between the Norden complex (Shed 26, MP 192.1) and the covered crossovers in Shed #47 (MP 198.8) about a mile east of the old
flyover at Eder, bypassing and abandoning the tunnel 6–8 complex, the concrete snowsheds just beyond them, and tunnels 9–12 ending at MP 195.7, all of which had been located on Track 1 within two miles of the summit. Since then all east- and westbound traffic has been run over the Track #2 grade crossing the summit about south of Donner Pass through the Tunnel #41 ("The Big Hole") running under Mt. Judah between Soda Springs and Eder, which was opened in 1925 when the summit section of the grade was double tracked. This routing change was made because the Track 2 and Tunnel 41 Summit crossing is far easier and less expensive to maintain and keep open in the harsh Sierra winters.
On June 18, 1868, the Central Pacific reached
Reno, Nevada
Reno ( ) is a city in the northwest section of the U.S. state of Nevada, along the Nevada–California border. It is the county seat and most populous city of Washoe County, Nevada, Washoe County. Sitting in the High Eastern Sierra foothills, ...
, after completing of railroad up and over the Sierras from
Sacramento, California
Sacramento ( or ; ; ) is the List of capitals in the United States, capital city of the U.S. state of California and the county seat, seat of Sacramento County, California, Sacramento County. Located at the confluence of the Sacramento Rive ...
. By then the railroad had already been prebuilt down the Truckee River on the much flatter land from Reno to
Wadsworth, Nevada, where they bridged the Truckee for the last time. From there, they struggled across a
forty mile desert to the end of the Humboldt river at the
Humboldt Sink. From the end of the Humboldt, they continued east over the
Great Basin Desert
The Great Basin Desert is part of the Great Basin between the Sierra Nevada and the Wasatch Range in the western United States. The desert is a geographical region that largely overlaps the Great Basin shrub steppe defined by the World Wildlife ...
bordering the
Humboldt River
The Humboldt River is the longest river in the northern and central part of Nevada. It extends in a general east-to-west direction from its headwaters in northern Nevada's Jarbidge Mountains, Jarbidge, Independence Mountains, Independence, and ...
to
Wells, Nevada. One of the most troublesome problems found on this route along the Humboldt was at
Palisade Canyon (near
Carlin, Nevada
Carlin is a city in Elko County of northeast Nevada, United States, and west of the city of Elko. As of the 2010 census, its population was 2,368, up from 2,161 at the 2000 census. Carlin sits along Interstate 80 at an elevation of appro ...
), where for the line had to be built between the river and basalt cliffs. From Wells, Nevada, to
Promontory Summit, the Railroad left the Humboldt and proceeded across the Nevada and Utah desert. Water for the
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
s was provided by wells, springs, or pipelines to nearby water sources. Water was often pumped into the water tanks with
windmills. Train fuel and
water cranes for the early trains with steam locomotives may have been as often as every . On one memorable occasion, not far from Promontory, the Central Pacific crews organized an army of workers and five train loads of construction material, and
laid of track on a prepared rail bed in one day—a record that still stands today. The Central Pacific and Union Pacific raced to get as much track laid as possible, and the Central Pacific laid about of track from Reno to Promontory Summit in the one year before the Last Spike was driven on May 10, 1869.
Central Pacific had 1,694 freight cars available by May 1869, with more under construction in their Sacramento yard. Major repairs and maintenance on the Central Pacific rolling stock was done in their Sacramento maintenance yard. Near the end of 1869, Central Pacific had 162 locomotives, of which 2 had two drivers (drive wheels), 110 had four drivers, and 50 had six drivers. The
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
s had been purchased in the eastern states and shipped to California by sea. Thirty-six additional locomotives were built and coming west, and twenty-eight more were under construction. There was a shortage of passenger cars and more had to be ordered. The first Central Pacific sleeper, the "Silver Palace Sleeping Car", arrived at Sacramento on June 8, 1868.
The CPRR route passed through
Newcastle and
Truckee in California, Reno, Wadsworth,
Winnemucca,
Battle Mountain,
Elko and Wells in Nevada (with many more fuel and water stops), before connecting with the Union Pacific line at Promontory Summit in the Utah Territory. When the eastern end of the CPRR was extended to Ogden by purchasing the
Union Pacific Railroad
The Union Pacific Railroad is a Railroad classes, Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United Stat ...
line from Promontory for about $2.8 million in 1870, it ended the short period of a boom town for
Promontory, extended the Central Pacific tracks about and made Ogden a major terminus on the transcontinental railroad, as passengers and freight switched railroads there.
Subsequent to the railhead's meeting at Promontory Summit, Utah Territory, the San Joaquin River Bridge at Mossdale Crossing (near present-day
Lathrop, California) was completed on September 8, 1869, with the first through freight train carrying freight from the East Coast leaving Sacramento and crossing the bridge to arrive that evening at the Alameda Wharf on San Francisco Bay. As a result, the western part of the route was extended from Sacramento to the
Alameda Terminal in
Alameda, California, and shortly thereafter, to the
Oakland Long Wharf at
Oakland Point in
Oakland, California
Oakland is a city in the East Bay region of the San Francisco Bay Area in the U.S. state of California. It is the county seat and most populous city in Alameda County, California, Alameda County, with a population of 440,646 in 2020. A major We ...
, and on to
San Jose, California
San Jose, officially the City of San José ( ; ), is a cultural, commercial, and political center within Silicon Valley and the San Francisco Bay Area. With a city population of 997,368 and a metropolitan area population of 1.95 million, it is ...
. Train ferries transferred some railroad cars to and from the Oakland wharves and tracks to wharves and tracks in
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...
. Before the CPRR was completed, developers were building other feeder railroads like the
Virginia and Truckee Railroad to the
Comstock Lode diggings in
Virginia City, Nevada, and several different extensions in California and Nevada to reach other cities there. Some of their main cargo was the thousands of
cords ( each) of firewood needed for the many steam engines and pumps, cooking stoves, heating stoves etc. in Comstock Lode towns and the tons of ice needed by the miners as they worked ever deeper into the "hot" Comstock Lode ore body. In the mines, temperatures could get above at the work face and a miner often used over of ice per shift. This new railroad connected to the Central Pacific near Reno, and went through
Carson City
Carson City, officially the Carson City Consolidated Municipality, is an independent city and the capital of the U.S. state of Nevada. As of the 2020 census, the population was 58,639, making it the 6th most populous city in the state. The m ...
, the new capital of Nevada.
After the transcontinental railroads were completed, many other railroads were built to connect up to other population centers in Utah, Wyoming, Kansas, Colorado, Oregon, Washington territories, etc. In 1869, the
Kansas Pacific Railway started building the
Hannibal Bridge, a
swing bridge across the
Missouri River
The Missouri River is a river in the Central United States, Central and Mountain states, Mountain West regions of the United States. The nation's longest, it rises in the eastern Centennial Mountains of the Bitterroot Range of the Rocky Moun ...
between
Kansas City, Missouri
Kansas City, Missouri, abbreviated KC or KCMO, is the largest city in the U.S. state of Missouri by List of cities in Missouri, population and area. The city lies within Jackson County, Missouri, Jackson, Clay County, Missouri, Clay, and Pl ...
, and
Kansas City, Kansas, which connected railroads on both sides of the Missouri while still allowing passage of
paddle steamer
A paddle steamer is a steamship or steamboat powered by a steam engine driving paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, whereby the first uses were wh ...
s on the river. After completion, this became another major east–west railroad. To speed completion of the
Kansas Pacific Railroad to Denver, construction started east from Denver in March 1870 to meet the railroad coming west from Kansas city. The two crews met at a point called Comanche Crossing, Kansas, on August 15, 1870. Denver was now firmly on track to becoming the largest city and the future capital of
Colorado
Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
. The
Kansas Pacific Railroad linked with the
Denver Pacific Railway via Denver to Cheyenne in 1870.
The original transcontinental railroad route did not pass through the two biggest cities in the so-called
Great American Desert
The term Great American Desert was used in the 19th century to describe the part of North America east of the Rocky Mountains to approximately the 100th meridian west, 100th meridian. It can be traced to Stephen Harriman Long, Stephen H. Long's ...
—
Denver, Colorado
Denver ( ) is a List of municipalities in Colorado#Consolidated city and county, consolidated city and county, the List of capitals in the United States, capital and List of municipalities in Colorado, most populous city of the U.S. state of ...
, and
Salt Lake City, Utah
Salt Lake City, often shortened to Salt Lake or SLC, is the List of capitals in the United States, capital and List of cities and towns in Utah, most populous city of the U.S. state of Utah. It is the county seat of Salt Lake County, Utah, Salt ...
. Feeder railroad lines were soon built to service these two and other cities and states along the route.
Modern-day
Interstate 80 roughly follows the path of the railroad from Sacramento across modern day California, Nevada, Wyoming and Nebraska, with a few exceptions. Most significantly, the two routes are different between Wells, Nevada, and
Echo, Utah. In this area the freeway passes along the south shore of the
Great Salt Lake and passes through
Salt Lake City
Salt Lake City, often shortened to Salt Lake or SLC, is the capital and most populous city of the U.S. state of Utah. It is the county seat of Salt Lake County, the most populous county in the state. The city is the core of the Salt Lake Ci ...
, cresting the
Wasatch Mountains at
Parley's Summit. The railroad was originally routed along the north shore, and later with the
Lucin Cutoff directly across the center of the Great Salt Lake, passing through the city of
Ogden instead of Salt Lake City. The railroad crosses the Wasatch Mountains via a much gentler grade through
Weber Canyon. Most of the other deviations are in mountainous areas where
interstate highways allow for grades up to six-percent grades, which allows them to go many places the railroads had to go around, since their goal was to hold their grades to less than two percent.
Construction

Most of the capital investment needed to build the railroad was generated by selling government-guaranteed bonds (granted per mile of completed track) to interested investors. The Federal donation of right-of-way saved money and time as it did not have to be purchased from others. The financial incentives and bonds would hopefully cover most of the initial capital investment needed to build the railroad. The bonds would be paid back by the sale of government-granted land, as well as prospective passenger and freight income. Most of the engineers and surveyors who figured out how and where to build the railroad on the Union Pacific were engineering college trained. Many of Union Pacific engineers and surveyors were
Union Army veterans (including two generals) who had learned their railroad trade keeping the trains running and tracks maintained during the U.S. Civil War. After securing the finances and selecting the engineering team, the next step was to hire the key personnel and prospective supervisors. Nearly all key workers and supervisors were hired because they had previous railroad on-the-job training, knew what needed to be done and how to direct workers to get it done. After the key personnel were hired, the semi-skilled jobs could be filled if there was available labor. The engineering team's main job was to tell the workers where to go, what to do, how to do it, and provide the construction material they would need to get it done.
Survey teams were put out to produce detailed contour maps of the options on the different routes. The engineering team looked at the available surveys and chose what was the "best" route. Survey teams under the direction of the engineers closely led the work crews and marked where and by how much hills would have to be cut and depressions filled or bridged. Coordinators made sure that construction and other supplies were provided when and where needed, and additional supplies were ordered as the railroad construction consumed the supplies. Specialized bridging, explosive and tunneling teams were assigned to their specialized jobs. Some jobs like explosive work, tunneling, bridging, heavy cuts or fills were known to take longer than others, so the specialized teams were sent out ahead by wagon trains with the supplies and men to get these jobs done by the time the regular track-laying crews arrived. Finance officers made sure the supplies were paid for and men paid for their work. An army of men had to be coordinated and a seemingly never-ending chain of supplies had to be provided. The Central Pacific road crew set a track-laying record by laying of track in a single day, commemorating the event with a signpost beside the track for passing trains to see.
In addition to the track-laying crews, other crews were busy setting up stations with provisions for loading fuel, water and often also mail, passengers and freight. Personnel had to be hired to run these stations. Maintenance depots had to be built to keep all of the equipment repaired and operational. Telegraph operators had to be hired to man each station to keep track of where the trains were so that trains could run in each direction on the available single track without interference or accidents. Sidings had to be built to allow trains to pass. Provision had to be made to store and continually pay for coal or wood needed to run the
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
s. Water towers had to be built for refilling the water tanks on the engines, and provision made to keep them full.
Labor
The majority of the Union Pacific track across the Nebraska and Wyoming territories was built by veterans of the Union and
Confederate armies, as well as many recent immigrants.
Brigham Young
Brigham Young ( ; June 1, 1801August 29, 1877) was an American religious leader and politician. He was the second President of the Church (LDS Church), president of the Church of Jesus Christ of Latter-day Saints (LDS Church) from 1847 until h ...
, President of
the Church of Jesus Christ of Latter-day Saints
The Church of Jesus Christ of Latter-day Saints, informally known as the LDS Church or Mormon Church, is a Nontrinitarianism, nontrinitarian Restorationism, restorationist Christianity, Christian Christian denomination, denomination and the ...
, landed contracts with the Union Pacific that offered jobs for around 2,000 members of the church with the hope that the railroad would support commerce in Utah. Church members built most of the road through Utah. Construction superintendent Durant repeatedly failed to pay the wages agreed upon. The Union Pacific train carrying him to the final spike ceremony was held up by a strike by unpaid workers in
Piedmont, Wyoming, until he paid them for their work. Representatives of Brigham Young had less success, and failed in court to force him to honor the contract.

The manual labor to build the Central Pacific's roadbed, bridges and tunnels was done primarily by many thousands of
emigrant workers from China under the direction of skilled non-Chinese supervisors. The Chinese were commonly referred to at the time as "
Celestials" and China as the "Celestial Kingdom". Labor-saving devices in those days consisted primarily of
wheelbarrows, horse or mule pulled carts, and a few railroad pulled gondolas. The construction work involved an immense amount of manual labor. Initially, Central Pacific had a hard time hiring and keeping unskilled workers on its line, as many would leave for the prospect of far more lucrative gold or silver mining options elsewhere. Despite the concerns expressed by
Charles Crocker, one of the "big four" and a general contractor, that the Chinese were too small in stature and lacking previous experience with railroad work, they decided to try them anyway. After the first few days of trial with a few workers, with noticeably positive results, Crocker decided to hire as many as he could, looking primarily at the California labor force, where the majority of Chinese worked as independent gold miners or in the service industries (e.g.: laundries and kitchens). Most of these Chinese workers were represented by a Chinese "boss" who translated, collected salaries for his crew, kept discipline and relayed orders from an American general supervisor. Most Chinese workers spoke only rudimentary or no English, and the supervisors typically only learned rudimentary Chinese. Many more workers were imported from the
Guangdong
) means "wide" or "vast", and has been associated with the region since the creation of Guang Prefecture in AD 226. The name "''Guang''" ultimately came from Guangxin ( zh, labels=no, first=t, t= , s=广信), an outpost established in Han dynasty ...
Province of China, which at the time, beside great poverty, suffered from the violence of the
Taiping Rebellion. Most Chinese workers were planning on returning with their newfound "wealth" when the work was completed. Most of the men received between one and three dollars per day, the same as unskilled white workers; but the workers imported directly from China sometimes received less. A diligent worker could save over $20 per month after paying for food and lodging—a "fortune" by Chinese standards. A snapshot of workers in late 1865 showed about 3,000 Chinese and 1,700 white workers employed on the railroad. Nearly all of the white workers were in supervisory or skilled craft positions and made more money than the Chinese.
Most of the early work on the Central Pacific consisted of constructing the railroad track bed, cutting and/or blasting through or around hills, filling in washes, building bridges or trestles, digging and blasting tunnels and then laying the rails over the Sierra Nevada mountains. Once the Central Pacific was out of the Sierras and the Carson Range, progress sped up considerably as the railroad bed could be built over nearly flat ground. In those days, the Central Pacific once did a section of of track in one day as a "demonstration" of what they could do on flat ground like most of the Union Pacific had in Wyoming and Nebraska.
The track laying was divided up into various parts. In advance of the track layers, surveyors consulting with engineers determined where the track would go. Workers then built and prepared the roadbed, dug or blasted through hills, filled in washes, built trestles, bridges or culverts across streams or valleys, made tunnels if needed, and laid the ties. The actual track-laying gang would then lay rails on the previously laid ties positioned on the roadbed, drive the spikes, and bolt the
fishplate bars to each rail. At the same time, another gang would distribute telegraph poles and wire along the grade, while the cooks prepared dinner and the clerks busied themselves with accounts, records, using the telegraph line to relay requests for more materials and supplies or communicate with supervisors. Usually the workers lived in camps built near their work site. Supplies were ordered by the engineers and hauled by rail, possibly then to be loaded on wagons if they were needed ahead of the railhead. Camps were moved when the railhead moved a significant distance. Later, as the railroad started moving long distances every few days, some railroad cars had
bunkhouses built in them that moved with the workers—the Union Pacific had used this technique since 1866.
Almost all of the roadbed work had to be done manually, using shovels, picks, axes, two-wheeled dump carts, wheelbarrows, ropes, scrapers, etc., with initially only black powder available for blasting. Carts pulled by mules, and horses were about the only labor-saving devices available then. Lumber and ties were usually provided by independent contractors who cut, hauled and sawed the timber as required.
Tunnels were blasted through hard rock by drilling holes in the rock face by hand and filling them with black powder. Sometimes cracks were found which could be filled with powder and blasted loose. The loosened rock would be collected and hauled out of the tunnel for use in a fill area or as roadbed, or else dumped over the side as waste. A foot or so advance on a tunnel face was a typical day's work. Some tunnels took almost a year to finish and the Summit Tunnel, the longest, took almost two years. In the final days of working in the Sierras, the recently invented
nitroglycerin
Nitroglycerin (NG) (alternative spelling nitroglycerine), also known as trinitroglycerol (TNG), nitro, glyceryl trinitrate (GTN), or 1,2,3-trinitroxypropane, is a dense, colorless or pale yellow, oily, explosive liquid most commonly produced by ...
explosive was introduced and used on the last tunnels including Summit Tunnel.
Supply trains carried all the necessary material for the construction up to the railhead, with mule or horse-drawn wagons carrying it the rest of the ways if required. Ties were typically unloaded from horse-drawn or mule-drawn wagons and then placed on the
track ballast and leveled to get ready for the rails. Rails, which weighed the most, were often kicked off the flatcars and carried by gangs of men on each side of the rail to where needed. The rails just in front of the rail car would be placed first, measured for the correct gauge with gauge sticks and then nailed down on the ties with
spike mauls. The fishplates connecting the ends of the rails would be bolted on and then the car pushed by hand to the end of the rail and rail installation repeated.
Track ballast was put between the ties as they progressed. Where a proper railbed had already been prepared, the work progressed rapidly. Constantly needed supplies included "food, water, ties, rails, spikes, fishplates, nuts and bolts, track ballast, telegraph poles, wire, firewood (or coal on the Union Pacific) and water for the steam train locomotives, etc."
After a flatcar was unloaded, it would usually be hooked to a small locomotive and pulled back to a siding, so another flatcar with rails etc. could be advanced to the railhead. Since juggling railroad cars took time on flat ground, where wagon transport was easier, the rail cars would be brought to the end of the line by steam locomotive, unloaded, and the flat car returned immediately to a siding for another loaded car of either ballast or rails. Temporary sidings were often installed where it could be easily done to expedite getting needed supplies to the railhead.
The railroad tracks, spikes, telegraph wire, locomotives, railroad cars, supplies etc. were imported from the east on sailing ships that sailed the nearly , 200-day trip around
Cape Horn. Some freight was put on
Clipper ships which could do the trip in about 120 days. Some passengers and high-priority freight were shipped over the newly completed (as of 1855)
Panama Railroad across the
Isthmus of Panama
The Isthmus of Panama, historically known as the Isthmus of Darien, is the narrow strip of land that lies between the Caribbean Sea and the Pacific Ocean, linking North America, North and South America. The country of Panama is located on the i ...
. Using
paddle steamer
A paddle steamer is a steamship or steamboat powered by a steam engine driving paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, whereby the first uses were wh ...
s to and from Panama, this shortcut could be traveled in as little as 40 days. Supplies were normally offloaded at the
Sacramento, California
Sacramento ( or ; ; ) is the List of capitals in the United States, capital city of the U.S. state of California and the county seat, seat of Sacramento County, California, Sacramento County. Located at the confluence of the Sacramento Rive ...
, docks where the railroad started.
Central Pacific construction
On January 8, 1863, Governor
Leland Stanford
Amasa Leland Stanford (March 9, 1824June 21, 1893) was an American attorney, industrialist, philanthropist, and Republican Party (United States), Republican Party politician from Watervliet, New York. He served as the eighth governor of Calif ...
ceremonially broke ground in Sacramento, California, to begin construction of the Central Pacific Railroad. After great initial progress along the Sacramento Valley, construction was slowed, first by the foothills of the
Sierra Nevada
The Sierra Nevada ( ) is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primari ...
, then by cutting a railroad bed up the mountains themselves. As they progressed higher in the mountains, winter snowstorms and a shortage of reliable labor compounded the problems. On January 7, 1865, a want ad for 5,000 laborers was placed in the Sacramento Union.
Consequently, after a trial crew of
Chinese workers was hired and found to work successfully, the Central Pacific expanded its efforts to hire more emigrant laborers—mostly Chinese. Emigrants from poverty stricken regions of China, many of which suffered from the strife of the
Taiping Rebellion, seemed to be more willing to tolerate the living and working conditions on the railroad construction, and progress on the railroad continued. The increasing necessity for tunneling as they proceeded up the mountains then began to slow progress of the line yet again.

The first step of construction was to survey the route and determine the locations where large excavations, tunnels and bridges would be needed. Crews could then start work in advance of the railroad reaching these locations. Supplies and workers were brought up to the work locations by wagon teams and work on several different sections proceeded simultaneously. One advantage of working on tunnels in winter was that tunnel work could often proceed since the work was nearly all "inside". Living quarters would have to be built outside and getting new supplies was difficult. Working and living in winter in the presence of snow slides and avalanches caused some deaths.
To carve a tunnel, one worker held a rock drill on the granite face while one to two other workers swung eighteen-pound sledgehammers to sequentially hit the drill which slowly advanced into the rock. Once the hole was about deep, it would be filled with black powder, a fuse set and then ignited from a safe distance. Nitroglycerin, which had been invented less than two decades before the construction of the first transcontinental railroad, was used in relatively large quantities during its construction. This was especially true on the Central Pacific Railroad, which owned its own nitroglycerin plant to ensure it had a steady supply of the volatile explosive. This plant was operated by Chinese laborers as they were willing workers even under the most trying and dangerous of conditions.
Chinese laborers were also crucial in the construction of 15 tunnels along the railroad's line through the Sierra Nevada mountains. These were about high and wide.
[Tzu-Kuei, "Chinese Workers and the First Transcontinental Railroad of the United States of America", p. 128.] When tunnels with vertical shafts were dug to increase construction speed, tunneling began in the middle of the tunnel and at both ends simultaneously. At first hand-powered
derrick
A derrick is a lifting device composed at minimum of one guyed mast, as in a gin pole, which may be articulated over a load by adjusting its Guy-wire, guys. Most derricks have at least two components, either a guyed mast or self-supporting tower ...
s were used to help remove loose rocks up the vertical shafts. These derricks were later replaced with steam hoists as work progressed. By using vertical shafts, four faces of the tunnel could be worked at the same time, two in the middle and one at each end. The average daily progress in some tunnels was only a day per face, which was very slow,
or daily according to historian George Kraus. J. O. Wilder, a Central Pacific-Southern Pacific employee, commented that "The Chinese were as steady, hard-working a set of men as could be found. With the exception of a few whites at the west end of Tunnel No. 6, the laboring force was entirely composed of Chinamen with white foremen and a "boss/translator". A single foreman (often Irish) with a gang of 30 to 40 Chinese men generally constituted the force at work at each end of a tunnel; of these, 12 to 15 men worked on the heading, and the rest on the bottom, removing blasted material. When a gang was small or the men were needed elsewhere, the bottoms were worked with fewer men or stopped so as to keep the headings going." The laborers usually worked three shifts of 8 hours each per day, while the foremen worked in two shifts of 12 hours each, managing the laborers. Once out of the Sierra, construction was much easier and faster. Under the direction of construction superintendent James Harvey Strobridge, Central Pacific track-laying crews set a record with of track laid in one day on April 28, 1869. Horace Hamilton Minkler, track foreman for the Central Pacific, laid the last rail and tie before the Last Spike was driven.

In order to keep the CPRR's Sierra grade open during the winter months, beginning in 1867, of massive wooden
snow sheds and galleries were built between Blue Cañon and Truckee, covering cuts and other points where there was danger of avalanches. 2,500 men and six material trains were employed in this work, which was completed in 1869. The sheds were built with two sides and a steep peaked roof, mostly of locally cut hewn timber and round logs. Snow galleries had one side and a roof that sloped upward until it met the mountainside, thus permitting avalanches to slide over the galleries, some of which extended up the mountainside as much as . Masonry walls such as the "Chinese Walls" at Donner Summit were built across canyons to prevent avalanches from striking the side of the vulnerable wooden construction. A few concrete sheds (mostly at crossovers) are still in use today.
Union Pacific construction

The major investor in the Union Pacific was Thomas Clark Durant, who had made his stake money by smuggling Confederate cotton with the aid of
Grenville M. Dodge. Durant chose routes that would favor places where he held land, and he announced connections to other lines at times that suited his share dealings. He paid an associate to submit the construction bid to another company he controlled,
Crédit Mobilier, manipulating the finances and government subsidies and making himself another fortune. Durant hired Dodge as chief engineer and
Jack Casement as construction boss.
In the East, the progress started in Omaha, Nebraska, by the Union Pacific Railroad which initially proceeded very quickly because of the open terrain of the
Great Plains
The Great Plains is a broad expanse of plain, flatland in North America. The region stretches east of the Rocky Mountains, much of it covered in prairie, steppe, and grassland. They are the western part of the Interior Plains, which include th ...
. This changed as the work entered Indian-held lands, because the railroad violated Native American treaties with the United States. War parties began to raid the moving labor camps that followed the progress of the line. Union Pacific responded by increasing security and hiring marksmen to kill
American Bison
The American bison (''Bison bison''; : ''bison''), commonly known as the American buffalo, or simply buffalo (not to be confused with Bubalina, true buffalo), is a species of bison that is endemic species, endemic (or native) to North America. ...
, which were both a physical threat to trains and the primary food source for many of the Plains Indians. The Native Americans then began killing laborers when they realized that the so-called "Iron Horse" threatened their existence. Security measures were further strengthened, and progress on the railroad continued.
Gen.
William Tecumseh Sherman
William Tecumseh Sherman ( ; February 8, 1820February 14, 1891) was an American soldier, businessman, educator, and author. He served as a General officer, general in the Union Army during the American Civil War (1861–1865), earning recognit ...
's first postwar command (Military Division of the Mississippi) covered the territory west of the Mississippi and east of the Rocky Mountains, and his top priority was to protect the construction of the railroads. In 1867, he wrote to Gen. Ulysses S. Grant, "we are not going to let thieving, ragged Indians check and stop the progress" of the railroads.
"On the ground in the West, Gen. Philip Henry Sheridan, assuming Sherman's command, took to his task much as he had done in the Shenandoah Valley during the Civil War, when he ordered the "scorched earth" tactics that presaged Sherman's March to the Sea."
"The devastation of the buffalo population signalled the end of the Indian Wars, and Native Americans were pushed into reservations. In 1869, the Comanche chief Tosawi was reported to have told Sheridan, "Me Tosawi. Me good Indian," and Sheridan allegedly replied, "The only good Indians I ever saw were dead." The phrase was later misquoted, with Sheridan supposedly stating, "The only good Indian is a dead Indian." Sheridan denied he had ever said such a thing."
"By the end of the 19th century, only 300 buffalo were left in the wild. Congress finally took action, outlawing the killing of any birds or animals in Yellowstone National Park, where the only surviving buffalo herd could be protected. Conservationists established more wildlife preserves, and the species slowly rebounded. Today, there are more than 200,000 bison in North America."
"Sheridan acknowledged the role of the railroad in changing the face of the American West, and in his ''Annual Report of the General of the U.S. Army'' in 1878, he acknowledged that the Native Americans were scuttled to reservations with no compensation beyond the promise of religious instruction and basic supplies of food and clothing—promises, he wrote, which were never fulfilled."
"We took away their country and their means of support, broke up their mode of living, their habits of life, introduced disease and decay among them, and it was for this and against this they made war. Could any one expect less? Then, why wonder at Indian difficulties?"
The "Last Spike" ceremony

Six years after the groundbreaking, laborers of the Central Pacific Railroad from the west and the Union Pacific Railroad from the east met at
Promontory Summit, Utah Territory. On the Union Pacific side was Union Pacific No 119, an 1868 4-4-0 type. Thrusting westward, the last two rails were laid by Irishmen. On the Central Pacific side was their Central Pacific No 60 Jupiter, another 1868 4-4-0 type. Thrusting eastward, the last two rails were laid by the Chinese.
It was at Promontory Summit on May 10, 1869, that the two engines met. Leland Stanford drove ''The Last Spike'' (or
golden spike
The golden spike (also known as the last spike) is the ceremonial 17.6-Carat (purity), karat gold final Rail spike, spike driven by Leland Stanford to join the rails of the first transcontinental railroad across the United States connecting t ...
) that joined the rails of the transcontinental railroad. The spike is now on display at the
Cantor Arts Center at
Stanford University
Leland Stanford Junior University, commonly referred to as Stanford University, is a Private university, private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth ...
, while a second "Last" Golden Spike is also on display at the
California State Railroad Museum in Sacramento. In perhaps the world's first live
mass-media event, the hammers and spike were wired to the
telegraph
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas ...
line so that each hammer stroke would be heard as a click at telegraph stations nationwide—the hammer strokes were missed, so the clicks were sent by the telegraph operator. As soon as the ceremonial "Last Spike" had been replaced by an ordinary iron spike, a message was transmitted to both the East Coast and West Coast that simply read, "DONE". Travel from coast to coast was reduced from six months or more to just one week.
Aftermath
Railroad developments
When the golden spike was driven, the rail network was not yet connected to the Atlantic or Pacific but merely connected
Omaha, Nebraska
Omaha ( ) is the List of cities in Nebraska, most populous city in the U.S. state of Nebraska. It is located in the Midwestern United States along the Missouri River, about north of the mouth of the Platte River. The nation's List of United S ...
to
Sacramento, California
Sacramento ( or ; ; ) is the List of capitals in the United States, capital city of the U.S. state of California and the county seat, seat of Sacramento County, California, Sacramento County. Located at the confluence of the Sacramento Rive ...
. To get from Sacramento to the Pacific, the Central Pacific purchased in 1867 the struggling
Western Pacific Railroad (unrelated to the
railroad of the same name that would later parallel its route) and in February 1868 resumed construction on it, which had halted in October 1866 because of funding troubles. Upon completing the last link at the Mossdale crossing of the
San Joaquin River on September 6, 1869, the first transcontinental rail passengers arrived at the Pacific Railroad's original western terminus on the
east side of San Francisco Bay at the
Alameda Terminal, where they transferred to the steamer ''Alameda'' for transport across the Bay to San Francisco. On November 8, 1869, the Central Pacific finally completed the rail connection to its western terminus at
Oakland, California
Oakland is a city in the East Bay region of the San Francisco Bay Area in the U.S. state of California. It is the county seat and most populous city in Alameda County, California, Alameda County, with a population of 440,646 in 2020. A major We ...
, also on the
East Bay
The East Bay is the eastern region of the San Francisco Bay Area and includes cities along the eastern shores of San Francisco Bay and San Pablo Bay. The region has grown to include inland communities in Alameda and Contra Costa counties. Wi ...
, where
freight
In transportation, cargo refers to goods transported by land, water or air, while freight refers to its conveyance. In economics, freight refers to goods transported at a freight rate for commercial gain. The term cargo is also used in ...
and
passengers completed their transcontinental link to San Francisco by
ferry
A ferry is a boat or ship that transports passengers, and occasionally vehicles and cargo, across a body of water. A small passenger ferry with multiple stops, like those in Venice, Italy, is sometimes referred to as a water taxi or water bus ...
.
The original route from the
Central Valley to the
Bay skirted the
Delta
Delta commonly refers to:
* Delta (letter) (Δ or δ), the fourth letter of the Greek alphabet
* D (NATO phonetic alphabet: "Delta"), the fourth letter in the Latin alphabet
* River delta, at a river mouth
* Delta Air Lines, a major US carrier ...
by heading south out of Sacramento through
Stockton and crossing the
San Joaquin River at
Mossdale, then climbed over the
Altamont Pass
Altamont Pass, formerly Livermore Pass, is a low mountain pass in the Diablo Range of Northern California between Livermore in the Livermore Valley and Tracy in the San Joaquin Valley. The name is actually applied to two distinct but nea ...
and reached the east side of the San Francisco Bay through
Niles Canyon. The Western Pacific was originally chartered to go to
San Jose, but the Central Pacific decided to build along the East Bay instead, as going from San Jose up the
Peninsula
A peninsula is a landform that extends from a mainland and is only connected to land on one side. Peninsulas exist on each continent. The largest peninsula in the world is the Arabian Peninsula.
Etymology
The word ''peninsula'' derives , . T ...
to
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...
itself would have brought it into conflict with
competing interests. The railroad entered
Alameda and
Oakland from the south, roughly paralleling what would later become
U.S. Route 50
U.S. Route 50 or U.S. Highway 50 (US 50) is a major east–west route of the U.S. Highway system, stretching from Interstate 80 (I-80) in West Sacramento, California, to Maryland Route 528 (MD 528) in Ocean City, Maryland, on the Atlantic ...
and later still Interstates
5,
205, and
580. A
more direct route was obtained with the purchase of the
California Pacific Railroad, crossing the
Sacramento River and proceeding southwest through
Davis to
Benicia, where it crossed the
Carquinez Strait by means of the enormous
Solano train ferry, then followed the shores of the
San Pablo and
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...
bays to
Richmond and the
Port of Oakland (paralleling
U.S. Route 40 which ultimately became
Interstate 80). In 1930, a
rail bridge across the Carquinez replaced the Benicia ferries.
Very early on, the Central Pacific learned that it would have trouble maintaining an open track in winter across the
Sierras. At first they tried plowing the road with special snowplows mounted on their steam engines. When this was only partially successful, an extensive process of building
snow sheds over some of the track was instituted to protect it from deep snows and avalanches. These eventually succeeded at keeping the tracks clear for all but a few days of the year.
Both railroads soon instituted extensive upgrade projects to build better bridges, viaducts and dugways as well as install heavier duty rails, stronger ties, better road beds etc. The original track had often been laid as fast as possible with only secondary attention to maintenance and durability. The primary incentive had been getting the subsidies, which meant that upgrades of all kinds were routinely required in the following years. The cost of making these upgrades was relatively small once the railroad was operating. Once the railroad was complete supplies could be moved from distant factories directly to the construction site by rail.
The Union Pacific would not connect Omaha to Council Bluffs until completing the
Union Pacific Missouri River Bridge in 1872.
Several years after the end of the Civil War, the competing railroads coming from Missouri finally realized their initial strategic advantage and a building boom ensued. In July 1869, the
Hannibal and St. Joseph Railroad finished the
Hannibal Bridge in Kansas City which was the first bridge to cross the Missouri River. This in turn connected to
Kansas Pacific trains going from Kansas City to Denver, which in turn had built the
Denver Pacific Railway connecting to the Union Pacific. In August 1870, the Kansas Pacific drove the last spike connecting to the Denver Pacific line at
Strasburg, Colorado, and the first true Atlantic to Pacific United States railroad was completed.
Kansas City's head start in connecting to a true transcontinental railroad contributed to it rather than Omaha becoming the dominant rail center west of Chicago.
The Kansas Pacific became part of the Union Pacific in 1880.
On June 4, 1876, an express train called the ''
Transcontinental Express'' arrived in San Francisco via the first transcontinental railroad only 83 hours and 39 minutes after it had left
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
. Only ten years before, the same journey would have taken months over land or weeks on ship, possibly all the way around South America.
The Central Pacific got a direct route to San Francisco when it was merged with the
Southern Pacific Railroad
The Southern Pacific (or Espee from the railroad initials) was an American Railroad classes#Class I, Class I Rail transport, railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was oper ...
to create the Southern Pacific Company in 1885. The Union Pacific initially took over the Southern Pacific in 1901 but was forced by the
U.S. Supreme Court to divest it because of monopoly concerns. The two railroads would once again unite in 1996 when the Southern Pacific was sold to the Union Pacific.
Having been bypassed with the completion of the
Lucin Cutoff in 1904, the Promontory Summit rails were pulled up in 1942 to be recycled for the
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
effort. This process began with a ceremonial "undriving" at the Last Spike location.
Crédit Mobilier

Despite the transcontinental success and millions in government subsidies, the Union Pacific faced bankruptcy less than three years after the Last Spike as details surfaced about overcharges that Crédit Mobilier had billed Union Pacific for the formal building of the railroad. The scandal hit epic proportions in the
1872 United States presidential election, which saw the re-election of
Ulysses S. Grant and became the biggest scandal of the
Gilded Age. It would not be resolved until the death of the congressman who was supposed to have reined in its excesses but instead wound up profiting from it.
Durant had initially come up with the scheme to have Crédit Mobilier subcontract to do the actual track work. Durant gained control of the company after buying out employee Herbert Hoxie for $10,000. Under Durant's guidance, Crédit Mobilier was charging Union Pacific often twice or more the customary cost for track work. The process mired down Union Pacific work.
Lincoln asked Massachusetts Congressman
Oakes Ames
Oakes Ames (January 10, 1804 – May 8, 1873) was an American businessman, investor, and politician. He was a member of the United States House of Representatives from Massachusetts. As a congressman, he is credited by many historians as being ...
, who was on the railroad committee, to clean things up and get the railroad moving. Ames got his brother
Oliver Ames Jr. named president of the Union Pacific, while he became president of Crédit Mobilier.
Ames then in turn gave stock options to other politicians while at the same time continuing the lucrative overcharges. The scandal was to implicate Vice President
Schuyler Colfax
Schuyler Colfax Jr. ( ; March 23, 1823January 13, 1885) was an American journalist, businessman, and politician who served as the 17th vice president of the United States from 1869 to 1873, and prior to that as the 25th Speaker of the United Sta ...
(who was cleared) and future President
James Garfield
James Abram Garfield (November 19, 1831 – September 19, 1881) was the 20th president of the United States, serving from March 1881 until Assassination of James A. Garfield, his death in September that year after being shot two months ea ...
among others.
The scandal broke in 1872 when the ''
New York Sun'' published correspondence detailing the scheme between Henry S. McComb and Ames. In the ensuing Congressional investigation, it was recommended that Ames be expelled from Congress, but this was reduced to a censure and Ames died within three months.
Durant later left the Union Pacific and a new rail baron,
Jay Gould
Jason Gould (; May 27, 1836 – December 2, 1892) was an American railroad magnate and financial speculator who founded the Gould family, Gould business dynasty. He is generally identified as one of the Robber baron (industrialist), robber bar ...
, became the dominant stockholder. As a result of the
Panic of 1873, Gould was able to pick up bargains, among them the control of the Union Pacific Railroad and
Western Union.
Visible remains

Visible remains of the historic line are still easily located—hundreds of miles are still in service today, especially through the Sierra Nevada Mountains and canyons in Utah and Wyoming. While the original rail has long since been replaced because of age and wear, and the roadbed upgraded and repaired, the lines generally run on top of the original, handmade grade. Vista points on
Interstate 80 through California's Truckee Canyon provide a panoramic view of many miles of the original Central Pacific line and of the
snow sheds which made winter train travel safe and practical.
In areas where the original line has been bypassed and abandoned, primarily because of the
Lucin Cutoff re-route in Utah, the original road grade is still obvious, as are numerous cuts and fills, especially the
Big Fill a few miles east of Promontory. The sweeping curve which connected to the east end of the Big Fill now passes a
Thiokol rocket research and development facility.
In 1957, Congress authorized the Golden Spike National Historic Site, which was redesignated the
Golden Spike National Historical Park in 2019. Today the site features replica engines of
Union Pacific No. 119 and Central Pacific
Jupiter
Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...
. The engines are fired up periodically by the National Park Service for the public. On May 10, 2006, on the anniversary of the driving of the spike, Utah announced that its
state quarter design would be a representation of the driving of the Last Spike.
Current passenger service
Amtrak
The National Railroad Passenger Corporation, Trade name, doing business as Amtrak (; ), is the national Passenger train, passenger railroad company of the United States. It operates intercity rail service in 46 of the 48 contiguous United Stat ...
's ''
California Zephyr
The ''California Zephyr'' is a Amtrak Long Distance, long-distance passenger train operated by Amtrak between Chicago, Illinois, Chicago and the San Francisco Bay Area (at Emeryville station, Emeryville), via Omaha, Nebraska, Omaha, Denver, Sa ...
'', a daily passenger service from
Emeryville, California
Emeryville is a city located in northwest Alameda County, California, in the United States. It lies in a corridor between the cities of Berkeley, California, Berkeley and Oakland, California, Oakland, with a border on the shore of San Francisc ...
(in the
San Francisco Bay Area
The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...
) to
Chicago
Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...
, uses the first transcontinental railroad from Sacramento to central Nevada. Because this rail line currently operates in a
directional running setup across most of Nevada, the ''California Zephyr'' will switch to the
Central Corridor at either
Winnemucca or
Wells.
In popular culture
The joining of the Union Pacific line with the Central Pacific line in May 1869 at
Promontory Summit, Utah, was one of the major inspirations for French writer
Jules Verne
Jules Gabriel Verne (;''Longman Pronunciation Dictionary''. ; 8 February 1828 – 24 March 1905) was a French novelist, poet and playwright.
His collaboration with the publisher Pierre-Jules Hetzel led to the creation of the ''Voyages extraor ...
's book entitled ''
Around the World in Eighty Days'', published in 1873.
[ William Butcher (translation and introduction). ''Around the World in Eighty Days'', Oxford Worlds Classics, 1995, Introduction.]
While not exactly accurate, John Ford's 1924 silent movie ''
The Iron Horse'' captures the fervent nationalism that drove public support for the project. Among the cooks serving the film's cast and crew between shots were some of the Chinese laborers who worked on the Central Pacific section of the railroad.

The feat is depicted in various movies, including the 1939 film ''
Union Pacific
The Union Pacific Railroad is a Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United States after BNSF, ...
'', starring
Joel McCrea and
Barbara Stanwyck and directed by
Cecil B. DeMille, which depicts the fictional Central Pacific investor Asa Barrows obstructing attempts of the Union Pacific to reach Ogden, Utah.
The 1939 movie is said to have inspired the ''
Union Pacific
The Union Pacific Railroad is a Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United States after BNSF, ...
'' Western television series starring
Jeff Morrow,
Judson Pratt and
Susan Cummings which aired in syndication from 1958 until 1959.
The 1962 film ''
How the West Was Won'' has a whole segment devoted to the construction; one of the movie's most famous scenes, filmed in
Cinerama, is of a buffalo stampede over the railroad.
The construction of what presumably is—or is suggested to be—the transcontinental railroad provides the backdrop of the 1968 epic
Spaghetti Western
The spaghetti Western is a broad subgenre of Western films produced in Europe. It emerged in the mid-1960s in the wake of Sergio Leone's filmmaking style and international box-office success. The term was used by foreign critics because most o ...
''
Once Upon a Time in the West'', directed by Italian director
Sergio Leone.
Graham Masterton's 1981 novel ''A Man of Destiny'' (published in the UK as ''Railroad'') is a fictionalized account of the line's construction.
The 1993 children's book ''Ten Mile Day'' by Mary Ann Fraser tells the story of the record setting push by the Central Pacific in which they set a record by laying of track in a single day on April 28, 1869, to settle a $10,000 bet.
Kristiana Gregory's 1999 book ''The Great Railroad Race'' (part of the "Dear America" series) is written as the fictional diary of Libby West, who chronicles the end of the railroad construction and the excitement that engulfed the country at the time.
In the 1999
Will Smith
Willard Carroll Smith II (born September 25, 1968) is an American actor, rapper, and film producer. Known for his work in both Will Smith filmography, the screen and Will Smith discography, music industries, List of awards and nominations re ...
film ''
Wild Wild West'', the joining ceremony is the setting of an assassination attempt on then U.S. President
Ulysses S. Grant by the film's antagonist
Dr. Arliss Loveless.
The main character in ''
The Claim'' (2000) is a surveyor for the
Central Pacific Railroad, and the film is partially about the efforts of a frontier mayor to have the railroad routed through his town.
In the 2002
DreamWorks Animation
DreamWorks Animation LLC (DWA, also known as DreamWorks Animation Studios or simply DreamWorks) is an American animation studio, owned by Comcast's NBCUniversal as part of Universal Pictures, a division of Universal Studios, Inc, Universal Stud ...
movie ''
Spirit: Stallion of the Cimarron'', the title character, a horse named Spirit, is delivered with other horses to pull a steam locomotive at a work site for the transcontinental railroad.
The ''
American Experience'' series'
2002–2003 season documents the railway in the episode titled "Transcontinental Railroad".
The building of the railway is covered by the 2004 BBC documentary series ''
Seven Wonders of the Industrial World'' in episode 6, "The Line".
The popular sci-fi television show ''
Doctor Who
''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series, created by Sydney Newman, C. E. Webber and Donald Wilson (writer and producer), Donald Wilson, depicts the adventures of an extraterre ...
'' featured the transcontinental railroad in a 2010 BBC audiobook entitled ''
The Runaway Train
This is a list of ''Doctor Who'' audiobooks. The first ''Doctor Who'' audiobook, consisting of readings by Gabriel Woolf of the novelisations of ''The Three Doctors (Doctor Who), The Three Doctors'', ''Carnival of Monsters'', and ''Terror of th ...
'', read by
Matt Smith
Matthew Robert Smith (born 28 October 1982) is an English actor. He is known for playing the Eleventh Doctor in the BBC science fiction television series ''Doctor Who'' (2010–2013), Prince Philip in Netflix's historical series ''The Crown ( ...
and written for audio by Oli Smith.
The construction of the transcontinental railroad provides the setting for the AMC television series ''
Hell on Wheels''. Thomas Durant is a regular character in the series and is portrayed by actor
Colm Meaney
Colm J. Meaney (; ; born 30 May 1953) is an Irish actor. Known for his performances across screen and stage, he has received seven nominations from the Irish Film & Television Academy, winning twice for 2001's '' How Harry Became a Tree'', and ...
.
The campaign mode of
Kalypso Media's 2018 video game ''
Railway Empire'' covers the construction of the transcontinental railroad and features key figures such as Thomas Durant and Collis Huntington.
See also
*
Chin Lin Sou
*
History of rail transportation in California
*
Interstate 80 – ''present-day New York-to-San Francisco transport link (highway)''
*
List of heritage railroads in the United States
*
Overland Route (Union Pacific Railroad)
*
Transcontinental railroad
A transcontinental railroad or transcontinental railway is contiguous rail transport, railroad trackage that crosses a continent, continental land mass and has terminals at different oceans or continental borders. Such networks may be via the Ra ...
Notes
References
Further reading
*
*
*
*
* Chang, Gordon H. (2019). ''Ghosts of Gold Mountain: The Epic Story of the Chinese Who Built the Transcontinental Railroad.'' Boston: Houghton Mifflin Harcourt.
* Cooper, Bruce C.
''"Riding the Transcontinental Rails: Overland Travel on the Pacific Railroad 1865–1881"''(2005), Polyglot Press, Philadelphia
* Cooper, Bruce Clement
(Ed), ''"The Classic Western American Railroad Routes"''. New York: Chartwell Books/Worth Press, 2010. ; BINC: 3099794.
* Duran, Xavier, "The First U.S. Transcontinental Railroad: Expected Profits and Government Intervention," ''Journal of Economic History,'' 73 (March 2013), 177–200.
*
*
* White, Richard. ''Railroaded: The Transcontinentals and the Making of Modern America'' (2010)
* Willumson, Glenn. ''Iron Muse: Photographing the Transcontinental Railroad'' (University of California Press; 2013) 242 pages; studies the production, distribution, and publication of images of the railroad in the 19th and early 20th centuries.
External links
For maps and railroad pictures of this era shortly after the advent of
photography
Photography is the visual arts, art, application, and practice of creating images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is empl ...
see:
Central Pacific Railroad Photographic History Museum"Map of the Central Pacific Railroad and its Connections" published in the California Mail Bag San Francisco News Letter and California Advertiser, Vol. 1, No. 4, Oct–Nov. 1871. accessed May 1, 2013.
* Union Pacific Railroad picture Museu
accessed March 1, 2013.
*
The Pacific Tourist' Williams, Henry T.; published by Adams & Bishop, New York, 1881 ed. Gives insights to travel in the late 1880s on the transcontinental railroad.
"I Hear the Locomotives: The Impact of the Transcontinental Railroad"in Utah
The Transcontinental Railroad*
ttp://cprr.org/Museum/Chinese.html Chinese-American Contribution to transcontinental railroadLinda Hall Library's Transcontinental Railroad educational site with free, full-text access to 19th century American railroad periodicalsNewspaper articles and clippings about the Transcontinental Railroad at Newspapers.com; Maps
*
ttps://www.loc.gov/collection/railroad-maps-1828-to-1900/?q=continental%20railway&fi=subject Route map at the Library of CongressMap of Union Pacific Railroad with DatesAbandoned route of the transcontinental railroad in Utah (with map)Geography of Chinese Workers Building the Transcontinental Railroad "''A virtual reconstruction of the key historic sites''" – Chinese Railroad Workers in North America Project; Center for Spatial and Textual Analysis (CESTA) at
Stanford University
Leland Stanford Junior University, commonly referred to as Stanford University, is a Private university, private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth ...
{{Omaha Railroads, state=collapsed
1860s in California
1869 establishments in the United States
Railway lines opened in 1869
American frontier
Historic Civil Engineering Landmarks
History of rail transportation in the United States
History of United States expansionism
Rail lines receiving land grants
Rail transportation in California
Rail transportation in Nevada
Rail transportation in Utah
Railway lines in Omaha, Nebraska
Railway lines in the United States
Southern Pacific Railroad
Union Pacific Railroad