Historedia
AmericasEvent

Western Union completes the first transcontinental telegraph

When
1861
Where
Salt Lake City; Construction route; National network
Episodes
3

Western Union completed the first transcontinental telegraph on October 24, 1861, connecting eastern networks to California via Salt Lake City. This milestone in electrical engineering resulted from Congressional subsidies and construction efforts that spanned difficult terrain, marking a significant development in U.S. communications infrastructure.

Episodes

  1. July 4, 1861 – October 1861 · Construction routeConstruction Crew Activity

    Creighton's crew began erecting poles in July 1861, planting 27,500 poles by October 1861.

  2. October 24, 1861 · Salt Lake CityCompletion of the Transcontinental Line

    Western Union completed the first transcontinental telegraph on October 24, 1861, connecting eastern networks to California via Salt Lake City.

  3. October 24–31, 1861 · National networkInitial Operation and Costs

    First messages sent to President Lincoln; initial charges were $1 per word, exceeding the 30-cent statutory limit.

Background and detail

Legislative and Corporate Context. Proposals for telegraph subsidies in Congress during the 1850s led to the Telegraph Act of 1860, which authorized bids for construction between Missouri and California. Western Union, established in 1856 by merging companies east of the Mississippi, undertook the construction work, transforming from a regional entity into a national player in communications.

Physical Construction Efforts. Construction crews, including Creighton's team, began erecting poles in July 1861. By October, they had planted 27,500 poles holding 2,000 miles of single-strand iron wire across challenging terrain. This physical infrastructure connected the existing eastern network to a small network in California via Salt Lake City.

Initial Operation and Costs. Upon completion, the first messages were sent to President Abraham Lincoln. The initial charge was US$1 per word, significantly higher than the 30 cents specified by the 1860 Telegraph Act. The line operated until 1869, when it was replaced by a multi-line telegraph constructed alongside the transcontinental railroad.

People involved

Sources

  1. First transcontinental telegraph Wikipedia, revision of 2025-09-21
  2. Western Union Wikipedia, revision of 2026-09-09

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.