Newport News is an independent city in the Commonwealth of Virginia in the United States. As of the 2010 census, the population was 180,719. In 2013, the population was estimated to be 183,412, making it the fifth-most populous city in Virginia. Newport News is included in the Hampton Roads metropolitan area. It is at the southeastern end of the Virginia Peninsula, on the northern shore of the James River extending southeast from Skiffe's Creek along many miles of waterfront to the river's mouth at Newport News Point on the harbor of Hampton Roads. The area now known as Newport News was once a part of Warwick County. Warwick County was one of the eight original shires of Virginia, formed by the House of Burgesses in the British Colony of Virginia by order of King Charles I, in 1634. The county was largely composed of farms and undeveloped land until almost 250 years later. In 1881, 15 years of explosive development began under the leadership of Collis P. Huntington, whose new Peninsula Extension of the Chesapeake and Ohio Railway from Richmond opened up transportation along the Peninsula and provided a new pathway for the railroad to bring West Virginia bituminous coal to port for coastal shipping and worldwide export. With the new railroad came a terminal and coal piers where the colliers were loaded. Within a few years, Huntington and his associates also built a large shipyard. In 1896, the new incorporated town of Newport News, which had briefly replaced Denbigh as the county seat of Warwick County, had a population of 9,000. In 1958, by mutual consent by referendum, Newport News was consolidated with the former Warwick County (itself a separate city from 1952 to 1958), rejoining the two localities to approximately their pre-1896 geographic size. The more widely known name of Newport News was selected as they formed what was then Virginia's third largest independent city in population. With many residents employed at the expansive Newport News Shipbuilding, the joint U.S. Air Force-U.S. Army installation at Joint Base Langley–Eustis, and other military bases and suppliers, the city's economy is very connected to the military. The location on the harbor and along the James River facilitates a large boating industry which can take advantage of its many miles of waterfront. Newport News also serves as a junction between the rails and the sea with the Newport News Marine Terminals located at the East End of the city. Served by major east-west Interstate Highway 64, it is linked to others of the cities of Hampton Roads by the circumferential Hampton Roads Beltway, which crosses the harbor on two bridge-tunnels. Part of the Newport News/Williamsburg International Airport is in the city limits.