model: builder: built: builder number:
prime mover: horsepower:
operating weight: length: max. speed:
TR6A "Cow" November 1950 13550
EMC 567B - 12 cylinder 800 230,000 lbs. 43 ft. 3 in. 65 MPH
The 1100 began life as EMD Demonstrator 1600. She was the test bed for the SW8 series of locomotives. At the time of her delivery for testing to the Southern Pacific, she was mated with
a companion cabless unit designated TR6B "calf". The two units doubled their horsepower and operating capabilities. The Southern Pacific Railroad purchased her the same month she was built and re-numbered her to 4600. The 4600 spent most of
her career in the San Francisco Bay Area and on the Northwestern Pacific. Later the calves were
separated and mated with SW8's and used in Roseville while the Cows were sent to work in the Los Angeles area. In 1965, the
Southern Pacific
renumbered her to her current 1100 number. In 1975, she was re-assigned from the Los Angeles area back to the SF Bay Area. The 1100 continued her Southern Pacific career as the SP's Sacramento Shops Switch Engine. In 1987, the 1100 was sold to
Sierra Pacific Industries to be used by the SPI's Quincy railroad as the back up Locomotive at their Susanville CA Lumber Mill. SPI also gave the 1100 a complete rebuild preserving her as an operational locomotive for the future. In the
early months of 2004, Sierra Pacific Industries closed the Susanville Mill. Sierra Pacific was gracious and outright donated the 1100 to the Western Pacific Railroad Museum. In November of that same year, SP 1100 set her wheels on WPRM rails.
she continues to operate today in the capacity of Caboose Train Locomotive and Yard switch engine. The 1100 is also a part of the WPRM's Famous Run-A-Locomotive program where you can run the 1100.
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