Union Pacific 4466

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Union Pacific 4466
UP 4466 Neil916.JPG
Type and origin
Power type Steam
Builder Lima Locomotive Works
Serial number 6003
Build date October, 1920
Configuration 0-6-0
Gauge 4 ft 8 12 in (1,435 mm)
Driver diameter 51 in (1,295 mm)
Weight on drivers 159,000 lb (72,000 kg)
Locomotive weight 159,000 lb (72,000 kg)
Fuel type Coal
Cylinder size 21 in (530 mm) dia × 26 in (660 mm) stroke
Performance figures
Tractive effort 34,400 lbf (153,000 N), 78,000 lbf (350,000 N) with booster
Operator(s) Union Pacific
Class S-6
Number(s) 4466
Retired 1999
Restored 1984
Current owner California State Railroad Museum
Disposition Display

Union Pacific 4466 is an 0-6-0 type steam locomotive built in October 1920 for the Union Pacific Railroad to perform switching chores and transfer runs. 4466 spent most of her career in Cheyenne, Wyoming as a shop switcher and was the UP Cheyenne Shop's last steam shop switcher. After her stint in Cheyenne, 4466 was transferred to Grand Island, Nebraska, remaining there until 1973.[1] She was donated to California State Railroad Museum in 1978. In 1984, she was restored to service and pulled museum excursions. In 1986, 4466 ventured to Vancouver, British Columbia to be part of Steam Expo '86.[2] In 1999, new California emissions regulations banned the operation of coal-fired steam locomotives,[citation needed] forcing the 4466 out of service indefinitely.[citation needed] 4466 is now a static display with no plans to return her to operation.[3]


  1. ^ "Richard Leonard's Random Steam Photo Collection - Union Pacific 0-6-0 4466". Railarchive.net. Retrieved 2014-02-04. 
  2. ^ "UP Joe Passentino | Stories | Union Pacific 150th Anniversary". UP150.com. Retrieved 2014-02-04. 
  3. ^ "Steam Locomotive Information". Steamlocomotive.info. Retrieved 2014-02-04.