On December 2, 1980, President Jimmy Carter signed a law that reshaped Alaska’s public-land map. The Alaska National Interest Lands Conservation Act, known as ANILCA, placed more than 104 million acres under conservation protections, including 57 million acres designated as wilderness. The legislation, recorded in the 1980 volume of the United States Statutes at Large , settled a long-running dispute over how much of Alaska’s vast federal land should remain protected and how much could be open to development. The final acreage exceeded the 80 million acres contemplated in the 1971 law.
Congress identified areas of national significance for wildlife habitat, subsistence, wilderness, recreation, science, scenery, and history. They served as temporary protections while lawmakers continued negotiations over the legislation that eventually became ANILCA. As described by the National Park Service , ANILCA went beyond the original 80 million-acre directive, adding more than 100 million acres to conservation system units. However, Carter had already advanced conservation efforts in Alaska before 1980, when he designated 11 national monuments under the Antiquities Act. The National Park Service describes his December 1978 proclamations as the most substantial use of the Antiquities Act to expand the National Park System. These designations followed the failure of Congress to pass an Alaska lands conservation bill before the December 1978 deadline.
The legislation therefore addressed several competing interests rather than focusing solely on whether Alaska’s lands should be preserved or opened to development.
The act transformed monuments into national parks and preserves, and the latter allows hunting and trapping. Glacier Bay and Katmai monuments became national parks with adjoining preserves, while Denali National Park was joined by a Denali National Preserve. This provision placed a limit on future unilateral expansion and gave Congress a central role in decisions about additional national park designations. It also reflected the compromise behind the legislation, which sought to conserve large tracts of land in an underdeveloped state while accounting for areas with potential for resource development.
ANILCA added more than 47 million acres to the National Park System, according to Carter’s National Park Service biography . This exceeded the nearly 45 million acres assigned to the system through the provisional national monument proclamations and surpassed by nearly 50% the 32.3 million acres proposed seven years earlier. That earlier proposal was part of the federal government’s Alaska land-planning process in 1973, before Carter became president in 1977. Immediately before Carter’s December 1978 proclamations, Alaska had one national park, two national monuments, and two national historical parks, according to the National Park Service. After December 1980, it had eight national parks, two national monuments, 10 national preserves, two national historical parks and one wild river.
ANILCA further prohibited expansion of the National Park System in Alaska by presidential proclamation, according to the Park Service.
