The GE U30B was a diesel-electric locomotive produced by GE Transportation between 1966 and 1975. It was a further development of the U28B, with a 3,000 hp (2,200 kW) 16-cylinder prime mover. The U30B competed with the EMD GP40 and the ALCO Century 430, but was not as successful as the GE U30C. After the merger between the Western Pacific and the Union Pacific, U30B 3051 was donated to the Western Pacific Railroad Museum in 1985.