<Tr> <Td> 3L / 21R </Td> <Td> 7,711 </Td> <Td> 2,350 </Td> <Td> Asphalt </Td> </Tr> <Tr> <Td> 3R / 21L </Td> <Td> 4,423 </Td> <Td> 1,348 </Td> <Td> Asphalt </Td> </Tr> <P> Tri-Cities Airport (IATA: PSC, ICAO: KPSC, FAA LID: PSC) is a public airport 2 miles (3 km) northwest of Pasco, in Franklin County, Washington, USA . It is the fourth largest commercial airport in the state of Washington, and has two runways . PSC covers 2,235 acres (904 ha) of land . </P> <P> The Tri-Cities Airport (then the Pasco Airport) was site of the first air mail contract flight between Elko, Nevada and Pasco, Washington made by Varney Airlines, (later United Airlines) in 1926 . The airport was relocated to its present site and became known as the Franklin County Airport . The United States Navy built Naval Air Station Pasco during World War II . After the war, the Navy sold the field to the city of Pasco, but still retains training privileges . Several Navy aircraft, especially the P - 3 Orion, use the field for landing and take - off training . The Port of Pasco then took ownership in 1963 and opened doors to a new Terminal Building in 1966 . </P>

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