Union Pacific 4466

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Union Pacific 4466
UP No. 4466 on static display at the California State Railroad Museum
Type and origin Power type Steam Builder Lima Locomotive Works Serial number 6003 Build date October 1920
Specifications Configuration: ​  • Whyte 0-6-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 51 in (1,295 mm) Adhesive weight 159,000 lb (72,000 kg) Loco weight 159,000 lb (72,000 kg) Fuel type Coal Boiler pressure 180 psi (1,200 kPa) 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
Career Operators Union Pacific Class S-6 (Cabside class S-51) Numbers UP 4466 Retired 1962 (revenue service) 1999 (excursion service) Restored 1984 Current owner California State Railroad Museum Disposition On static display

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.

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]

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. The engine and tender were loaded onto flatcars in Sacramento, and headed to Vancouver, via rail on a Union Pacific freight train. Once she had arrived in Vancouver, the locomotive and tender were unloaded, placed on the tracks and fired up in order to pass a safety test that would insure it was safe for the engine operate in Canada. At the conclusion of Expo '86, 4466 and her tender were again loaded onto flatcars and moved back to the CSRM, via Union Pacific freight train.^[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 Railfair's of 1991 and 1999.

In 1999, the 4466’s FRA boiler certificate expired. The CSRM decided not to pursue an overhaul, causing the 4466 to be retired and put on indefinite static display. In 2012 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.

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

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