the area and has been popular since its startup in 1995. The city purchased of property from the Union Pacific Railroad in 1995 with the goal of creating a better draw for more people to the downtown area. In 2004, Las Vegas Mayor Oscar Goodman announced plans for Symphony Park, which could include a mixture of offerings, such as residential space and office buildings. Already operating in Symphony Park is the Cleveland Clinic Lou Ruvo Center for Brain Health (opened in 2010), The Smith Center for the Performing Arts (opened in 2012) and the DISCOVERY Children's Museum (opened in 2013). On land across from Symphony Park, the World Market Center Las Vegas opened in 2005. It currently encompasses three large buildings with a total of 5.1 million square feet. Trade shows for the furniture and furnishing industries are held there semiannually. Also located nearby is the Las Vegas North Premium Outlets. With a second expansion, completed in May 2015, the mall currently offers 175 stores. City offices moved to a new Las Vegas City Hall in February 2013 on downtown's Main Street. The former City Hall building is now occupied by the corporate headquarters for the major online retailer, Zappos.com, which opened downtown in 2013. Zappos CEO Tony Hsieh took an interest in the urban area and contributed $350 million toward a revitalization effort called the Downtown Project. Projects funded include Las Vegas's first independent bookstore, The Writer's Block. Other industries A number of new industries have moved to Las Vegas in recent decades. Online shoe retailer Zappos.com (now an Amazon subsidiary) was founded in San Francisco but by 2013 had moved its headquarters to downtown Las Vegas. Allegiant Air, a low-cost air carrier, launched in 1997 with its first hub at Harry Reid International Airport and headquarters in nearby Summerlin. Planet 13 Holdings, a cannabis company, have opened the world's largest cannabis dispensary in Las Vegas at . Impact of growth on water supply A growing population means the Las Vegas Valley used more water in 2014 than in 2011. Although water conservation efforts implemented in the wake of a 2002 drought have had some success, local water consumption remains 30 percent more than in Los Angeles, and over three times that of San Francisco metropolitan area residents. The Southern Nevada Water Authority is building a $1.4 billion tunnel and pumping station to bring water from Lake Mead, has