In 1907, AT&SF and SP jointly formed the Northwestern Pacific Railroad (NWP), which took over several short railroads and built new lines connecting them to form a route from San Francisco north to Eureka, California. In 1928, Santa Fe sold its half of the NWP to SP. Also in 1928, Santa Fe purchased the U.S. portion of the Kansas City, Mexico & Orient Railway (the Mexican portion of the line became the Chihuahua-Pacific Railway, now part of National Railways of Mexico).