The Rocky Flats National Wildlife Refuge was previously a buffer zone for a production facility of what?
Rocky Flats National Wildlife Refuge The Rocky Flats National Wildlife Refuge is a unit of the National Wildlife Refuge System in the United States located approximately 16 mi northwest of Denver, Colorado. The site was previously the Rocky Flats Plant's security buffer zone and is not currently open to the general public for access.
Sibley Lake National Wildlife Refuge The Sibley Lake National Wildlife Refuge is located in the U.S. state of North Dakota and consists of 1,077 acres (4.35 km). Sibley Lake is a privately owned easement refuge, managed with by the U.S. Fish and Wildlife Service. The refuge was established to protect habitat for migratory bird species, white-tail deer and other mammals. Valley City Wetland Management District oversees the refuge, which in turn is a part of the Arrowwood National Wildlife Refuge Complex. Sibley Lake is a 525 acre (2.12 km) fresh water marsh.