The University of California, Riverside (UCR) main campus is located within the City of Riverside in western Riverside County, three miles (5km) east of downtown, and comprises 1,112 acres (4.50km) divided into eastern and western boundaries by the State Route 60 freeway. Nearly half of the total area is devoted to agricultural teaching and research fields, most of which are located west of the freeway. The original buildings that formed the earliest kernel of the campus included the UC Citrus Experiment Station laboratory, residential buildings, and barn, all of which are still in use today, although for different purposes. They were designed by Lester H. Hibbard of Los Angeles, a graduate of the University of California School of Architecture, in association with a colleague, H.B. Cody. Built at a cost of $165,000, the architecture of the major buildings followed the Mission Revival style suggesting the Spanish colonial heritage of Southern California.