The Rocky Flats National Wildlife Refuge was previously a buffer zone for a production facility of what?
Rocky Flats Plant The Rocky Flats Plant was a former nuclear weapons production facility in the western United States, near Denver, Colorado. Operated from 1952 to 1992, it was under the control of the U.S. Atomic Energy Commission (AEC), succeeded by the Department of Energy (DOE) in 1977.
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.