Great Northern Y-1

ClassNumbersLast runScrapped1957 (1), 1960 (1), 1962 (1), 1966 (5)DispositionAll scrapped

The Great Northern Railway's class Y-1 comprised eight electric locomotives with AAR 1-C+C-1 wheel arrangements. The locomotives were used on the 73-mile (117 km) electrified portion of the railroad, from Wenatchee, Washington to Skykomish, Washington, including the Cascade Tunnel.

The 3,000 horsepower (2.2 MW) locomotives were built at Schenectady, New York, with car bodies manufactured by American Locomotive Company and electrical components supplied by General Electric. They used motor-generator sets to rectify the alternating current line voltage into direct current for their traction motors.

The GN numbered the units 5010–5017 and classified them Y-1. After being involved in a wreck at Tonga, Washington in July 1945, the 5011 was rebuilt with a streamlined appearance and EMD F-unit cabs; the GN reclassified it as Y-1a.

In 1956, the GN dieselized operations through the Cascade Tunnel. The electrical system was decommissioned, and the Y-1 locomotives were sold to the Pennsylvania Railroad, who classified them as FF2. GN 5011 was broken up for spares, and the remaining seven locomotives were overhauled and converted to PRR standards and then placed into service, being assigned numbers 1–7 on the PRR. They lasted a few more years on the PRR, and were all scrapped between 1957 and 1966.

ALCO serial	GE serial	Build date	GN No.	PRR No.	Scrap date
67022	10160	August 1927	5010	1	1966
67023	10161	September 1927	5011	—	1957
67542	10537	September 1928	5012	2	1962
67543	10538	July 1928	5013	3	1966
68272	11149	August 1930	5014	4	1960
68273	11150	August 1930	5015	5	1966
68274	11151	August 1930	5016	6	1966
68275	11152	August 1930	5017	7	1966

• Keyes, Norman C. Jr.; Middleton, Kenneth R. (Autumn 1980). "The Great Northern Railway Company: All-Time Locomotive Roster, 1861–1970". Railroad History. 143 (143). Boston, Mass.: Railway and Locomotive Historical Society: 117. ISSN 0090-7847. JSTOR 43523930.
• Pennsylvania Railroad. "FF2". PRR Locomotive Diagrams. Retrieved 2006-01-05. (Simple drawing and specifications, for general reference by railroad staff).
• Staufer, Alvin F.; Pennypacker, Bert (1962). Pennsy Power: Steam and Electric Locomotives of the Pennsylvania Railroad, 1900-1957. Research by Martin Flattley. Carollton, Ohio: Alvin F. Staufer. ISBN 978-0-9445-1304-0. pages 248–253