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Welcome to the National Park Service and Department of Energy’s information page for the Manhattan Project National Historical Park.

About the Park

For over a decade, the Department of Energy and National Park Service, in cooperation with other Federal agencies, state and local governments, and other stakeholders, pursued the possibility of including the Department’s most significant Manhattan Project properties within a Manhattan Project national park. After numerous studies and several draft bills, Congress passed the National Defense Authorization Act of 2015, which included provisions authorizing the Park. President Obama signed the National Defense Authorization Act into law on December 19, 2014.

The Defense Act establishes the Manhattan Project National Historical Park as a unit of the National Park Service no later than one year after enactment. Prior to establishing the park, the Secretary of the Interior and the Secretary of Energy are required by the act to enter into an agreement defining the respective roles and responsibilities of the departments in administering the park. The agreement will include provisions for enhanced public access, management, interpretation, and historic preservation.