Union Pacific Diesel Locomotives
This page was last updated on February 26, 2013.
This first group of news and changes to UP's locomotive fleet was done for publication in the Locomotive Notes II, a special news section published as part of Diesel Era magazine for two years.
May-June 1996 (portions used in Diesel Era, Volume 7, Number 5, September/October 1996, page 58)
July-August 1996 (portions used in Diesel Era, Volume 8, Number 1, January/February 1997, page 54)
September-October 1996 (portions used in Diesel Era, Volume 8, Number 1, January/February 1997, page 54)
November-December 1996 (used in Diesel Era, Volume 8, Number 2, March/Aril 1997, pages 59, 60)
January-February 1997 (used in Diesel Era, Volume 8, Number 3, May/June 1997, page 60)
March 1997 (used in Diesel Era, Volume 8, Number 4, July/August 1997, page 56)
April-May 1997 (used in Diesel Era, Volume 8, Number 5, September/October 1997, page 56)
June-July-August 1997 (used in Diesel Era, Volume 8, Number 6, November/December 1997, pages 55, 56)
(The Locomotive Notes II news section of Diesel Era was discontinued after Volume 8, Number 6, November/December 1997.)
This group of news and changes to UP's locomotive fleet was done for distribution via email and internet news groups; first on the original Streamliner newsgroup, then later on LocoNotes. I started the LocoNotes newsgroup in November 1998 in part as a place to share this information.
Highlights of 1998 -- 1998 highlights were used in the 1999 locomotive directory
Highlights of 1999 -- 1999 highlights were used in the 2000 locomotive directory
Highlights of 2000 -- 2000 highlights were published in Diesel Era, Volume 12 , Number 2, March/April 2001, page 45
UP Diesel Roster Updates
1998, 1999, 2000 -- Three Union Pacific Locomotive Directories were published. A fourth issue for 2001 was prepared, but was not published.
2001-2005 -- From 2001 through late 2005, Jim Harrawood posted the changes to his web site, which was discontinued after his death in January 2006.
September 2005 through June 2009 -- All the known changes from 2001 forward were incorporated in the online Union Pacific diesel roster, as a minimal effort meant to simply keep the roster up to date, without any background research or analysis.
After the updates for June 2009 were incorporated, the effort came to an end.
Maintaining a "current" UP diesel roster first started in 1988 and became a real challenge to keep up-to-date. It was a good run, but the time had come for it to stop. Time and effort would be focused on documenting all of Union Pacific's history, including steam locomotives back to 1864.