UP and Oregon Short Line In Utah

Index For This Page

This page was last updated on September 15, 2025.

(Return To the Union Pacific In Utah Page)

Overview and Timeline

OSL in Utah, Salt Lake City to Ogden, and north of Ogden -- Tracks owned by OSL; all UP lines north of Salt Lake City (leased to UP in 1936; merged with UP in 1987)

OSL Newspaper Articles

OSL Locations in Utah

(Salt Lake City to Ogden and North)

UP-OSL's Cache Junction

UP's Cache Junction -- Thornton Waite's article about Cache Junction in northern Utah.

OSL in Salt Lake City

From a Union Pacific engineering drawing dated March 1913:

UP's 3rd West Industrial Lead -- Narrative and text for the construction in 1953 of Union Pacific's 3rd West Industrial Lead; an example of UP's dominance over D&RGW in the 1950s.

UP's Monroc Spur -- Information about the Monroc spur in north Salt Lake City, from the north end of UP's North Yard, northeast across Beck Street to the Monroc limestone quarry. Duirng the 1970s this quarry was a source of railroad ballast.

OSL in Davis County

OSL at Ogden

(Read more about OSL&UN in Ogden as part of Ogden Rails)

After UP gained controlled of OSL in 1898, and especially after 1900, Union Pacific in Ogden, and Oregon Short Line in Ogden were essentially the same company.

(Read more about Union Pacific in Ogden as part of Ogden Rails)

OSL at Dewey

OSL Branches in Utah

(listed alphbetically)

OSL Baker Siding and Spur

North of Brigham City, east of the Bear River

OSL Bear River Branch

Garland (on Malad Branch) south to Bear River City, west of the Bear River

OSL Cache Valley Branches

UP's Cache Valley Branches -- Information about Union Pacific in Cache Valley in northern Utah, including a summary of the various branches in Cache Valley, all built by Oregon Short Line Railroad.

OSL Evona Branch

OSL Little Mountain Branch

North of Ogden. Hot Springs westward to east shore of Great Salt Lake.

Completed in 1971. Abandoned in 1997.

UP's Little Mountain Branch -- Information about the branch built in 1971, and abandoned in 1997; westward from Hot Springs, serving mineral extraction industries on Great Salt Lake.

OSL Malad Branch

Built by Malad Valley Railroad, a direct subsidiary of OSL; incorporated on November 25, 1902.

OSL and Malad Valley Railroad signed an agreement with Bear River Water Company, on November 25, 1902, to construct a line from Corinne, north to a construction site of a new sugar factory to be built by Bear River Water Company, a distance of 12 miles (later known as Garland). The new contrsuction included a new connecting line between the OSL at Brigham City, and a connection with Central Pacific at a point near Corinne, then into and through Corinne to a connection with Malad Valley Railroad. The water company agreed to acquire all needed property and right of way, and then to pass all rights and ownership of said property and right of way to OSL and Malad Valley Railroad. In return, in a separate agreement on the same day, OSL and Malad Valley Railroad agreed provide transportation services for the sugar factory, at a rate that was the same or lower than any rate that the sugar company might obtain from any competing railroad.

From Brigham City to Corinne Junction was called the "Brigham City Cutoff".

The land companies involved in the development of the agricultural land adjacent to the new Malad Branch included the Bear River Land, Orchard and Sugar Beet Company, and the Bear River Valley Land Company, which was in receivership and was sold to the Malad Valley Railroad in April 1903.

OSL/UP leased all of the former Central Pacific facilities, trackage and right-of-way between Corinne Junction and Corinne on June 5, 1945, effective on March 16, 1945, with a right to purchase. The trackage and property was purchased on October 16, 1947.

(from UP AFE 14, dated March 20, 1947)

March-June 1968
On a date in the three-month period between March 10, 1968, and June 30, 1968 (the dates of the appliable Union Pacific public timetables), the mixed train local servive the Malad Branch was discontinued. The Malad mixed train was UP Trains 311 and 312, and was shown in the March 10, 1968 public timetable, but not in the June 30, 1968 public timetable.

OSL Syracuse Branch

UP's Syracuse Branch -- Information about UP's Syracuse Branch, which ran west from Clearfield to the Great Salt Lake.

OSL Thatcher Branch

From a point near Tremonton (on Malad Branch, west to Thatcher.

(from OSL drawing 21809, dated January 1924)

(from UP AFE 148, dated September 12, 1922)

OSL Urban Branch

North of Brigham City, east of the Bear River

(from OSL drawing 20716, dated February 1919)

Sources

Compiled from handwritten notes, dating from 1978-1988, with recent updates from other material.

Most of the original information here was transcribed from handwritten notes taken while doing research in the files of UP's engineering department during 1982-1983, then compiled as a computer file in 1988, with additions through September 1994. Other updates and additions made after creation of web page in 2015.

The notes from the early 1980s were completed prior to the closure of UP's engineering office in Salt Lake City in about 1984. All files and most personnel were moved to Omaha in 1983-1984. The office was located in the Utah Division offices in the former depot annex building, just south of Union Pacific's Salt Lake City depot. The building was demolished in 1999 to make room for The Gateway Project.

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