501, SW1, Class S-50, was built by Electro-Motive in August 1939, #906, FN E287-2.  It was transferred as Sacramento Northern RR 401, Class S-50, in 1965 and returned as WP 501, Class S-50.  It was sold as Corn Products Corp 501 .It went to Feather River Railway Museum in 1987 and restored as WP 501.

502, SW1, Class S-50, was built by Electro-Motive in December 1939, #988, FN E283-1.  It was transferred as SNRR 402, Class S-50, in December 1965 and donated to California State Railroad Museum as SN 402 in 1983.

504. S1, Class S-50, was built by Alco in April 1942, #69685,  It was transferred as SN 504, Class S-50, in December 1967 and sold as Quincy RR 4 on May 17, 1973.   It went to Feather River Railway Museum in 2005.

505, S1, Class S-50, was built by Alco in April 1942, #69686.  It was sold as Stockton Terminal & Eastern RR 505 in 1970.

506, S1, Class S-50, was built by Alco in May 1942, #69687.  It was sold as ST&E 506 in 1968 and is now at the Feather River Rail Society.

508, S1, Class S-50, was built by Alco in May 1942, #69689.  It was retired in 1971 and sold for scrap to Associated Metals.

509, S1, Class S-50, was built by Alco in May 1942, #69690.  It was traded in to General Electric in December 1967 and sold as Pacific States Steel Corp 509.  It was sold to Railcar Maintentance.

510, S1, Class S-50, was built by Alco in May 1942, #69691.  It was sold as ST&E 507 in 1972 and used for parts later.

511, S1, Class S-50, was built by Alco in June 1942, #69692.  It was traded in to General Electric in December 1967 and sold as PSSCorp 511. It was sold as Corn Products Corp 511 and was sold as Yolo Shortline RR 511 in November 1990.  It became Sierra Northern Ry 511 in November 2003.

"512", S1, was built by Alco in November 1941, #69514, as Lone Star Army Ammunition Plant 100.  It became United States Arm 7372 and became Defense Supply Agency 41043 in 1977.  It was sold to WPRM and restored as WP 512.

553, S2, Class S-57, was built by Alco in November 1943, #70952.  It was sold for scrap to Associated Metals.

554, S2, Class S-57, was built by Alco in November 1943, #70953.  It was sold as Tidewater Southern Ry 744 in 1969 and resold as Oakland Terminal Ry 102 on February 25, 1970.  It was sold to Railway Equipment Leasing Co 1014.

555, S2, Class S-57, was built by Alco in December 1943, #71287.  It was retired in 1971 and sold for scrap to Associated Metals.

556, S2, Class S-57, was built by Alco in December 1943, #71288.  It was sold to Chrome Crankshaft Co in 1970 and sold to Schnizter Steel Products for scrap in October 1973.

559, S2, Class S-57, was built by Alco in February 1950, #76905.  It was traded in to General Electric in 1968 and sold for scrap to Hyman-Michaels Co.

560, S2, Class S-57, was built by Alco in February 1950, #77018.  It was sold as ST&E 560 in 1976 and later retired.

561, S2, Class S-57, was built by Alco in February 1950, #77019.  It was sold as ST&E 561 in 1976 and used for parts later.

563, S4, Class S-57, was built by Alco in May 1951, #78777.  It was sold as Central California Traction Co 50 in October 1973 and returned to WP in 1976.  It was sold as Foster Farms with no number and resold to private owners.  It was given to Feather River Rail Society where it has been restored as WP 563.

564, S4, Class S-57, was built by Alco in May 1951, #78778.  It was sold as ST&E 564 in 1976.

582, VO1000, Class S-60, was built by Baldwin in October 1945, #71529.  It was was sold to Chrome Crankshaft and sold for scrap to Associated Metals in 1970.

601, SW9, Class S-62, was built by Electro-Motive in May 1952, #16636, FN 4168-1.  It was rebuilt in Omaha as Union Pacific 1271, Class SW10, on November 30, 1984,  It was retired on June 5, 1991, and sold to Western Railway Supply in October 1991.  It was sold to Peoria Locomotive Works and rebuilt as Peoria & Pekin Union Ry 701.  It became Tazewell & Peoria Ry 701 in 2004.

603, SW9, Class S-62, was built by Electro-Motive in June 1952, #16638, FN 4168-3.  It was retired in September 1983 and rebuilt as UP 1272 on November 30, 1984.  It was retired on October 7, 1996, It was sold to Quality Aggregate Co on October 29, 1997.

604, SW9, Class S-62, was built by Electro-Motive in June 1952, #16639, FN 4168-4.  It was retired in April 1984 and sold to Pielet Bros on June 26, 1987.  It was scrapped by Scrap Service in September 1987.

605, SW9, Class S-62, was built by Electro-Motive in June 1952, #16679, FN 4168-5.    It was retired in September 1983.  It was rebuilt as UP 1273 on December 22, 1984, and retired on October 7, 1996.  It was sold to Helm Financial Corp in February 1997.  It was sold as Texas Rock Crusher RR 97.  It was transferred as Texas Gonzales & Northern Ry 97 and was renumbered 105.