Yardmasters

 Western Railway Supervisors Association --Yardmasters on the Southern Pacific organized in 1938, joining the Railroad Yardmasters of America in 1941. A dozen years later yardmasters on the SP Pacific Lines joined another Union, the Railroad Yardmasters of North America. In 1967 SP yardmasters withdrew from the RYNA and formed their own independent Union, the Western Railway Supervisors Association. WRSA's ranks grew in 1974 when yardmasters on the St. Louis SouthWestern voted to affiliate.WRSA voted to merge with TCU in 1983. Its members now constitute System Board 555 and, like other groups within the Union, they also operate under their own by-laws.