88 FR 37266
BLM withdrew approximately 336,404.42 acres of public lands surrounding Chaco Culture National Historical Park from location and entry under U.S. mining laws and from leasing under mineral leasing laws, but not mineral materials laws, subject to valid existing rights, to protect these public lands and the greater connected landscape with a rich Puebloan, Tribal Nation, and cultural legacy in San Juan, Sandoval, and McKinley counties, New Mexico, for a period of 20 years.