Manhattan Project Sites Study Act of 2004 - Directs the Secretary of the Interior to conduct a special resource study of the Manhattan Project sites at the Los Alamos National Laboratory in New Mexico, the Hanford Site in the State of Washington, and the Oak Ridge Laboratory in Tennessee (Project sites), to assess the national significance, suitability, and feasibility of designating such sites as a unit of the National Park System.
Requires the Secretary, in conducting the study, to: (1) consult with interested government officials, representatives of organizations, and members of the public; (2) evaluate, in coordination with the Secretary of Energy, the compatibility of designating a Project site with maintaining the specified goals of the Department of Energy (DOE) and public health and safety; and (3) consider existing DOE research on the Project sites.
Requires the Secretary to report to Congress on such study.