Prudhoe Bay or Sagavanirktok is a census-designated place (CDP) located in North Slope Borough in the U.S. state of Alaska. As of the 2010 census, the population of the CDP was 2,174 people; however, at any given time several thousand transient workers support the Prudhoe Bay oil field. The airport, lodging, and general store are located at Deadhorse; the rigs and processing facilities are located on scattered gravel pads laid atop the tundra. It is only during winter that the surface is hard enough to support heavy equipment and new construction happens at that time. Prudhoe Bay is the unofficial northern terminus of the Pan-American Highway. The Bay itself is still 10 miles further North beyond a security checkpoint, so open water is not visible from the Highway. A few tourists, arriving by bus after a two-day ride up the Dalton Highway from Fairbanks, come to see the tundra, the Arctic Ocean, and the midnight sun, staying in lodgings assembled from modular buildings. Tours must be arranged in advance (photo ID required) to see the Arctic Ocean and the Bay itself.