Union Pacific 2-10-2 type steam locomotive 5511, was built by the Baldwin Locomotive Works in September 1923, builder number 56999. The locomotive was Union Pacific class TTT-6, using UP’s system of the first letter of each digit in the wheel arrangement to designate the class. As a Two-Ten-Two locomotive (2-10-2), the TTT designation was derived.
Early in its career, UP 5511 was assigned to the Los Angeles and Salt Lake, a subsidiary of the Union Pacific and was assigned to hauling freight trains known as drag freights for their high tonnage and low speeds.
5511 was first stored serviceable starting in 1949 and operated as needed through 1956, including a stint as a stationary boiler at Ogden, UT. It was stored unserviceable at Green River, WY, from 1958 through 1961, but was used in the filming of Union Pacific’s publicity movie, Last of the Giants in 1958. The locomotive was pushed by a diesel located behind a string of freight cars with smoke created by burning old tires in the smokebox to create the illusion of a live locomotive.
UP 5511 was towed dead from Green River, WY, to Cheyenne, WY, in 1962 after its retirement and stored with other heritage equipment in the roundhouse there where it resided for sixty years until its donation to RRHMA-Silvis.
If you would like to support the restoration of #5511 or any other equipment at RRHMA-Silvis and preserve railroading history, become a member or donate today.
#5511 Specifications
Builder – Baldwin Locomotive Works
Serial number – 56999
Build date – Sept 1923
Driver dia. 69 in
Wheelbase 121 ft 10+7⁄8 in (Engine + tender)
Axle load 67,333 lb
Adhesive weight 404,000 lb
Loco weight 627,900 lb
Tender weight 446,000 lb
Total weight 1,073,900 lb
Fuel type No. 5 fuel oil, originally coal
Fuel capacity 6,450 US gal
Water cap. 25,000 US gal
Firebox:
• Firegrate area 132 sq ft
Boiler 94 in
Boiler pressure 280 lbf/in2
Heating surface 4,795 sq ft
• Tubes 527 sq ft
• Flues 3,687 sq ft
• Firebox 140 sq ft
Superheater:
• Heating area 2,162 sq ft
Cylinders – Four – Each 21 in × 32 in
