ticket lobby and boarding area. In 2014, the Port of Pasco approved a $42 million renovation and expansion, planning to double the size of the terminal. The construction began in August 2014 and finished in January 2017. The first phase of the expansion was completed on September 7, 2015, which included a new west concourse with gates 3, 4 and 5 as well as new car rental and baggage claim areas. The second phase started shortly thereafter, planning to demolish the old boarding area and replace it with a new east concourse to house gates 1 and 2. On January 27, 2017, the $42 million airport renovation and expansion, which added a new terminal, security area and baggage handling system was officially opened to the public. The new terminal is intended to meet the needs of the Tri-Cities metropolitan area for the next 20 years, with passenger enplanements/deplanements in 2019 reaching a new high of 870,900. Current use The airport's terminal at the south end of the field is the property of the Port of Pasco, at the north end of North 20th Avenue. Firefighting, however, is handled by the City of Pasco. A new fire station has recently been built on the terminal grounds. The old Navy station buildings on the north end of the airport are being used by other firms. The airport is undergoing a major resurfacing of the runways, funded by the American Recovery and Reinvestment Act. Major tenants and commercial activity General and corporate aviation are important to PSC and they have many facilities to accommodate them. The airport has over 120 based aircraft that belong to business and general aviation operators. T-hangars are available on the airport and two FBOs offer fuel and other services, Bergstrom Aircraft Inc. and Tri-Cities Aviation. The airport has two aircraft sales companies on the field: JD Aircraft Sales and Viper Aircraft Corp; both also offer storage. PSC also has commercial air traffic. The airport is served by the regional affiliates of several major airlines such as Alaska and United. Delta Air Lines, Avelo Airlines and Allegiant Air operate mainline jets at present. Delta Air Lines flies Skywest E175s as well as Airbus A319s/A320s, Avelo Airlines operates Boeing 737s, with Allegiant Air flying Airbus 320s. Alaska Airlines, operated by Horizon Air, currently flies Bombardier Q400 aircraft on some services being replaced with E175s. Empire Airlines operates FedEx Feeder also