In 1950, West Des Moines had a population of 5,615, but the city grew as many new housing subdivisions were built. West Des Moines annexed the neighboring community of Clover Hills in 1950, the town of Ashawa, a former Rock Island railroad stop, in 1957, and the town of Commerce, along the Raccoon River, in 1960. City government also grew, and when the venerable city hall could not keep up with the city's expansion, the city opened a new municipal building in 1954. With the influx of students, the school district's ever-expanding borders continually compromised classroom capacity. Children attended school in former homes near Phenix, with classes in hallways and living rooms. Space was even rented from the new Catholic grade school. In 1959 alone, 150–200 new homes were built, adding to the population's growth. The construction of Interstate 35, Interstate 80, and Interstate 235 in the 1960s brought more people and businesses to West Des Moines. This construction also caused the Des Moines Golf and Country Club to sell its location along Ashworth Road and 8th Street and then move to its current location in Dallas County. In 1966, Dowling Catholic High School/St. Joseph Educational Center purchased from the Des Moines Golf and Country Club and, subsequently, moved from Des Moines and opened at its current location, 1400 Buffalo Road, in the fall of 1972. Several retail and office complexes opened along the I-235 corridor after the freeway's completion, including Valley West Mall, which opened in 1975. West Des Moines' population jumped from 11,964 in 1960 to 31,702 in 1990.