Historical:

In 1981, the Chaco Culture Interagency Management Group (IMG)—composed of the NPS, the Bureau of Land Management, the Bureau of Indian Affairs, the Navajo Nation, the State of New Mexico, and the U.S. Forest Service—was created to provide for development of a joint management plan for formally designated Chacoan outlying sites, as required under Public Law 96-550. The agencies involved in the development of the plan had either jurisdiction over or interest in lands containing outlying sites. The IMG provides advisory oversight through review of management decisions, sharing of technical expertise, and assistance with necessary legislation, to assure consistent and coordinated management. In 1983, the Chaco Culture Interagency Management Group issued the document Chaco Archeological Protection Site System: Joint Management Plan, which contained guidelines for the identification, preservation, protection, and research of designated Chacoan outlying sites.