English/Spanish. The Santa Fe Rail Yards resulted in a number of barrios emerging on the city’s north side. In time, numbers of Mexican workers left the railroads for better jobs in nearby meat-packing plants. At least 75% of first generation Mexican male immigrants worked for the railroads. The Mexican population was located adjacent to the railroad tracks in the 400-9-- blocks of South Commerce and Santa Fe street. In order for the railroads to meet the demand of laying track in the late 1800s and early 1900s, they began exclusively hiring Mexican immigrant labor. The 1910 U.S. census documents Mexican laborers living in boxcars along the railroads and in camps along the tracks because of segregation and discrimination.