Charles T. Hayden, and his family operated the mill for three full generations, and it was crucial to Tempe's community industry. Also in 1877, Charles' son Carl Hayden, who was to become a congressman and then senator from Arizona, was born in the Hayden family home, a building which, after spending around 60 years as a restaurant, began restoration to its 1924-era state in 2014. The Hayden's Ferry Post Office was renamed the Tempe Post Office in 1879. In 1889, the new Phoenix and Maricopa Railroad linked Tempe with Phoenix. In 1894, the Maricopa County Board of Supervisors incorporated the town of Tempe. Tempe finally became a city after being inhabited for over 30 years. In 1962, the Laird and Dines Drug Store closed after 68 years of operation at the corner of Mill Avenue and Fifth Street. This drug store was one of the original fixtures on the commercial district of Mill Avenue. Tempe’s commercial center along Mill Avenue declined during these years. In 1964, construction of the Grady Gammage Memorial Auditorium, designed by Frank Lloyd Wright, was completed at the intersection of Mill Avenue and Apache Boulevard on the campus of Arizona State University. Prompted by Tempe’s centennial in 1971, Mill Avenue was revitalized into an entertainment and shopping district that attracts people from throughout the Phoenix Valley. In 1997, the Hayden Flour Mill closed after 123 years of continuous operation. The mill's last operator was Bay State Milling, which had purchased it in 1981. It is significant as the oldest continuously used industrial site in the Salt River Valley. The Valley Art Theater (operated by Harkins Theatres) is located on Mill Avenue as a comfortable single screen theater that typically shows art house and occasionally foreign films. The current building was built in 1938, although it underwent substantial internal renovations in the 1990s. AMC Centerpoint, an 11-screen complex, is also located on the avenue. It was originally owned by Harkins; however, with the completion of the Tempe Marketplace, which provided a more modern building, Harkins closed it in January 2008. AMC reopened the Centerpoint in April 2014. Sun Valley Parkway is mainly located in Buckeye, with a small portion extending into Surprise, Arizona. Built in the 1980s, the four-lane divided parkway traverses approximately 30 miles of what was once open desert about 35 miles west of downtown Phoenix. It extends north–south from Interstate 10 at exit 109 (Sun Valley Parkway / Palo Verde Road) in Buckeye, turns after about 12 miles or so to become an east–west road, and leads eastward to Surprise, where the road connects to and becomes Bell Road through Surprise and other West Valley suburbs (and eventually the City of Phoenix itself).