Peter A. Dey
19th century civil engineer who located the Union Pacific route to Promontory Utah.
About Peter A. Dey
Lived 1825 – 1911 (aged 85–86). Peter A. Dey was an American manager, politician, explorer and civil engineer.
Peter Anthony Dey (1825–1911) was born at Romulus, Seneca County, New York on January 27, 1825. His father was Dr. Philip Dey, a son of Theunis Dey, Colonel of a New Jersey regiment in the Revolutionary war. In 1849, he was hired by New York state to help rebuild the Cayuga and Seneca Canal locks in Seneca Falls. Then he worked on the Erie Canal at Port Byron.
Dey married Catherine Thompson (1834–1899) of Connecticut at the Trinity Church in Buffalo on Oct. 23, 1856.; they had six children. In the winter of 1856, he rejoined the Rock Island railroad company, building its rail line west to Kellogg. Dey became mayor of Iowa City in 1860.
In 1862 Dey explored locations for the future Union Pacific Railroad working for Thomas C. Durant. Dey became chief engineer of the railroad until he was replaced by Grenville Dodge.
In 1864, Dey retired from his railroad interests and entered the banking industry at his home town, Iowa City, Iowa. Dey became president of the First National Bank of Iowa City, serving in that capacity until his death in 1911.
In 1872, Dey was one of three commissioners that oversaw the construction of the new Iowa State Capitol building at Des Moines, Iowa, a task that was not completed until 1884. In 1879, Dey was appointed railroad commissioner by Governor Gear and reappointed by Governors Sherman and Larrabee continuing thru 1896.
Death and legacy Dey was a member of the Iowa State Historical Society at Iowa City and for twelve years served as its president. Dey died at Iowa City, Iowa, on July 12, 1911.
Peter Anthony Dey's greatest contribution was the first survey of the Union Pacific Railroad. In Seneca Falls, New York, the name of the street connecting the residential area along the Seneca River in “the Flats” with Cayuga Street was named Dey Street in his honor until it was submerged in 1915 when "the water level of the reconstructed Cayuga-Seneca Canal was raised by the artificial lake now known as Van Cleef Lake."
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Important facts
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Frequently asked questions
Who was Peter A. Dey?
19th century civil engineer who located the Union Pacific route to Promontory Utah.
When was Peter A. Dey born?
Peter A. Dey was born in 1825.
When did Peter A. Dey die?
Peter A. Dey died in 1911.
What was Peter A. Dey's occupation?
Peter A. Dey was a manager, politician, explorer and civil engineer.
What nationality was Peter A. Dey?
Peter A. Dey was American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Peter A. Dey. https://biography.guide/peter-a-dey/
MLA: "Peter A. Dey." Biography.guide, https://biography.guide/peter-a-dey/.
Chicago: "Peter A. Dey." Biography.guide. https://biography.guide/peter-a-dey/.
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