The NANA region encompasses 38,000 square miles of western Alaska, an area approximately the same size as the state of Indiana. NANA, an Alaska Native Regional Corporation, was formed in 1972 with the merger of the area's regional corporation and 10 separate Alaska Native Village Corporations formed after the passage of the Alaska Native Claims Settlement Act on December 18, 1971. Its Land Department manages all corporate-owned lands within the region. This includes all lands within village boundaries that have not been transferred to the local municipal governments or other entities pursuant to Section 14(c) of ANCSA. In communities that have not completed 14(c) agreements and where other land such as townsite land is limited, NANA is the main entity to provide site control for public improvement projects, including clinics, schools, school sites, landfills and sewage lagoons. The NANA land department also tracks and manages incoming land conveyances from the Federal Government, administers a trespass program, and maintains a Geographic Information System to track land status. NANA Land Development is headquartered in Anchorage, Alaska.