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Promontory, Utah

Promontory, Utah is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Promontory, Utah rather than just read about it. In short: Promontory is an area of high ground in Box Elder County, Utah, United States, 32 mi (51 km) west of Brigham City and 66 mi (106 km) northwest of Salt Lake City. Rising to an elevation of 4,902 feet (1,494 m) above sea level, it lies to the north of the Promontory Mountains and the Great Salt Lake.

Promontory, Utah — main illustration
Promontory, Utah — illustration

Key takeaways

  • Promontory, Utah belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Promontory, Utah to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Promontory, Utah from memory before moving on to harder problems.

Reference excerpt

Promontory is an area of high ground in Box Elder County, Utah, United States, 32 mi (51 km) west of Brigham City and 66 mi (106 km) northwest of Salt Lake City. Rising to an elevation of 4,902 feet (1,494 m) above sea level, it lies to the north of the Promontory Mountains and the Great Salt Lake. It is notable as the location of Promontory Summit, where the first transcontinental railroad in the United States, from Sacramento to Omaha, was officially completed on May 10, 1869. The location is sometimes confused with Promontory Point, a location further south along the southern tip of the Promontory Mountains. Both locations are significant to the Overland Route: Promontory Summit was where the original, now abandoned, alignment crossed just north of the Promontory Mountains; while Promontory Point is where the modern alignment, called the Lucin Cutoff, crosses the southern tip of the Promontory Mountains. By the summer of 1868, the Central Pacific (CP) had completed the first rail route through the Sierra Nevada mountains, and was now moving down towards the Interior Plains and the Union Pacific (UP) line. More than 4,000 workers, of whom two thirds were Chinese, had laid more than 100 mi (160 km) of track at altitudes above 7,000 ft (2,100 m). In May 1869, the railheads of the Union Pacific and the Central Pacific railroads finally met at Promontory Summit, Utah Territory. A specially-chosen Chinese and Irish crew had taken only 12 hours to lay the final 10 mi (16 km) of track in time for the ceremony.

Golden Spike

Promontory Summit, Utah Territory, had been agreed upon as the point where the two railheads would officially meet, following meetings in Washington, D.C., in April 1869, where it was also agreed that a ceremony would be held to drive in the Last Spike to commemorate the occasion. However, the original date of May 8 had to be postponed for two days because of bad weather and a labor dispute on the Union Pacific side. Over 400 laid-off unpaid graders and tie cutters chained U.P.R.R. Vice-President Thomas Durant's dignitary railcar to a siding in Piedmont, Wyoming, until he wired for money to pay them. After almost a two-day delay, when Durant's train arrived at the Devil's Gate Bridge in Wyoming, floodwaters turned a mild creek into a raging torrent, which threatened to collapse the railroad bridge. The engineer would not take his locomotive, whose number is lost to history, across the rickety structure, but he gave each of the passenger cars a hefty heave. The cars coasted across, but Durant no longer had a way to get to Promontory. A hasty telegraph to Ogden, Utah Territory, sent Union Pacific's engine "119" to the rescue. After a hearty party in Ogden the night of May 9, the dignitaries arrived at Promontory Summit on the morning of May 10, where the Golden Spike Ceremony was finally planned and took place, with the last iron spike driven at 12:47 PM. The trains carrying the railroads' officials were drawn by Union Pacific's No. 119 and Central Pacific's No. 60 (officially named the Jupiter) locomotives, neither of which had been originally chosen for the ceremony. The Central Pacific had originally chosen their no. 29 Antelope to attend the ceremony, while the Union Pacific had also chosen another, unidentified engine for their train, but both engines encountered mishaps en route to the ceremony. On May 10, the Jupiter and 119 were drawn up face-to-face on Promontory Summit, separated only by the width of a single tie. It is unknown how many people attended the event; estimates run from as low as 500 to as many as 3,000 government and railroad officials and track workers. The lack of Chinese workers seen in the official portrait has been ascribed to anti-Chinese sentiment in the United States. However, their absence may have been the result of the timing of the famous photograph:

The more famous A.J. Russell photograph could not include the Chinese workers photographed earlier participating in the joining of the rails ceremony, because at the moment the famous photo was being taken it was after the conclusion of the ceremony and the Chinese workers were away from the two locomotives to dine at J.H. Strobridge's boarding car, being honored and cheered by the CPRR (Central Pacific Railroad) management. Three of the eight Chinese workers who brought up the last rail were guests of honor at the Promontory Summit's golden anniversary celebrations in Ogden, Utah in May 1919.

… excerpt ends here. Continue reading the full article.

Illustrations

Promontory, Utah illustration
Promontory, Utah illustration
Promontory, Utah: The Last Spike by Thomas Hill (1881)
The Last Spike by Thomas Hill (1881)
Promontory, Utah: Promontory Summit in the 1870s
Promontory Summit in the 1870s
Promontory, Utah: Aerial view of the trestle over the northern part of the Great Salt Lake west of Ogden in Box Elder County, Utah, with the replacement causeway on right (August 1971)
Aerial view of the trestle over the northern part of the Great Salt Lake west of Ogden in Box Elder County, Utah, with the replacement causeway on right (August 1971)

Worked examples

Example 1 — a first encounter with Promontory, Utah

Start with the simplest possible case. Write down what Promontory, Utah claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Promontory, Utah before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Promontory, Utah ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Promontory, Utah

In research
Promontory, Utah appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Promontory, Utah in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Promontory, Utah is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1869 establishments in Utah Territory, First transcontinental railroad, Populated places in the United States established in 1869, so understanding it makes those chapters shorter.
In everyday life
Look for Promontory, Utah outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Promontory, Utah in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Promontory, Utah means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Promontory, Utah out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Promontory, Utah in simple terms?

Promontory is an area of high ground in Box Elder County, Utah, United States, 32 mi (51 km) west of Brigham City and 66 mi (106 km) northwest of Salt Lake City. Rising to an elevation of 4,902 feet (1,494 m) above sea level, it lies to the north of the Promontory Mountains and the Great Salt Lake.

Why does Promontory, Utah matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Promontory, Utah?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Promontory, Utah.

Tags

  • 1869 establishments in Utah Territory
  • First transcontinental railroad
  • Populated places in the United States established in 1869
  • Unincorporated communities in Box Elder County, Utah
  • Unincorporated communities in Utah

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