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Show • The Bureau administers the dam and appurtenant facilities, and the Colorado River to 2,500 feet downstream of the dam. • The Bureau will vary the water level in Lake Powell to the extent necessary for the purposes of the Glen Canyon storage unit. In keeping with Interior policy, the Bureau will provide " full consideration of public recreation and conservation" in its decisions on reservoir management. The Bureau is required to keep the Service continuously informed of changes in reservoir operation schedules. ( The fluctuation in water level in Lake Powell is typically in the 20- to 25- foot range over the course of a year, with highest water during summer. The Colorado River Basin Project Act of 1968 [ P. L. 90- 537] established 3700 feet above mean sea level as the full pool elevation for Lake Powell. ) • The Service manages all other federal lands and waters within the recreation area boundary. It also administers licenses, permits, and contracts to provide public services, such as developed recreation facilities, and regulates public use of the lake and lands. Glen Canyon NRA's enabling legislation provides for fishing in the recreation area in accordance with federal and state law. The National Park Service may designate areas of closure for the purposes of " public safety, administration, or public use and enjoyment," and may regulate Lake Powell fisheries after consultation with the state. The only areas closed to fishing by the Service are marina dock areas and the Bureau of Reclamation administrative zone near the dam, which is closed for safety reasons. The Arizona Department of Health Services and Utah Division of Environmental Health have promulgated water quality standards for primary uses ( drinking, recreation, and aquatic resources) pursuant to the Clean Water Act of 1977 ( P. L. 92- 500). As a federal land management agency, the National Park Service must " adhere to all . . . applicable Federal, State, and local laws regarding avoidance, amelioration or elimination of environmental pollution" ( including water pollution) and comply with Executive Order 11752, which requires the prevention and control of pollution at federal facilities. In addition, Section 404 of the Clean Water Act requires that the U. S. Army Corps of Engineers issue permits for disposal of dredged or fill materials in waters of the U. S. or for structures affecting waters of the U. S., which include Lake Powell and the Colorado River. Other legislation and executive orders influencing water resources management include the following: • The National Park Service Organic Act ( 1916) directs NPS to preserve park resources for future generations while allowing for public enjoyment of park lands. 3 |