Union Pacific 4466

Union Pacific 4466 is an 0-6-0 steam locomotive built in October 1920 by the Lima Locomotive Works for the Union Pacific Railroad (UP) to perform switching chores and transfer runs.

Union Pacific 4466
UP No. 4466 on static display at the California State Railroad Museum
Type and origin
Power typeSteam
BuilderLima Locomotive Works
Serial number6003
Build dateOctober 1920
Specifications
Configuration:
​
 • Whyte0-6-0
Gauge4 ft 8+1⁄2 in (1,435 mm)
Driver dia.51 in (1,295 mm)
Adhesive weight159,000 lb (72,000 kg)
Loco weight159,000 lb (72,000 kg)
Fuel typeCoal
Boiler pressure180 psi (1,200 kPa)
Cylinder size21 in (530 mm) dia × 26 in (660 mm) stroke
Performance figures
Tractive effort34,400 lbf (153,000 N), 78,000 lbf (350,000 N) with booster
Career
OperatorsUnion Pacific
ClassS-6 (Cabside class S-51)
NumbersUP 4466
Retired1962 (revenue service)
1999 (excursion service)
Restored1984
Current ownerCalifornia State Railroad Museum
DispositionOn static display

History

Revenue service

UP 4466 spent most of its career in Cheyenne, Wyoming, as a shop switcher and was the UP Cheyenne Shop's last steam shop switcher. After its stint in Cheyenne, 4466 was transferred to Grand Island, Nebraska in 1960. The locomotive was retired from revenue service in July 1962.[1] It continued to remain in Grand Island in storage until 1973 when it was donated to the Railway and Locomotive Historical Society.[2]

Excursion service

In 1978, No. 4466 was donated to the California State Railroad Museum. In 1984, it was restored to operating service and pulled excursion trains for the museum. In 1986, 4466 ventured to Vancouver, British Columbia, to be part of Steam Expo '86.[3] This was not the only time 4466 took part in such a celebration; it also went to Sacramento (its current home) to take part in the Rail Fair of 1991.

Disposition

In 1999, new California emissions regulations banned the operation of coal-fired steam locomotives, which caused the 4466 to be retired and put on indefinite static display. In 2013 it was taken out to take part in the Union Pacific's 150th anniversary celebration. As of 2023, it is currently on static display at the California State Railroad Museum.

  • Union Pacific 4466 at SteamExpo 86
    Union Pacific 4466 at SteamExpo 86
  • Union Pacific 4466 at SteamExpo 86
    Union Pacific 4466 at SteamExpo 86

References
  1. "UP 0-6-0 Class S-6 4466".
  2. "Richard Leonard's Random Steam Photo Collection - Union Pacific 0-6-0 4466". Railarchive.net. Retrieved February 4, 2014.
  3. "May 2021 Marks the 35th Anniversary of 'Steam Expo' Held during Expo '86" (PDF). WCRA News. Vol. 61, no. 2. West Coast Railway Association. May 2021. p. 3. Archived from the original (PDF) on January 29, 2022. Retrieved March 4, 2022.
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