Southern Pacific Railroad's (SP) number 6051 is an EMD E9 diesel locomotive. It was one of nine E9s built for SP by EMD in December 1954 as Construction Number 20100 on SP Order Number P-1041 and EMD Order Number 2068. It entered service on January 4, 1955 at Los Angeles. These nine locomotives allowed the dieselization of the Coast Daylight and Lark passenger trains. The units operated with E7s, ALCO PAs, and other passenger equipped diesels as required. Assigned to the Los Angeles passenger pool for its entire career, it worked north via the Coast Line to San Francisco or east on the Sunset route to El Paso or New Orleans. When SP and Rock Island began pooling locomotives on the Chicago-Los Angeles Golden State in 1967, it also worked those trains until they were discontinued the followi