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Operation Of Glen Canyon Dam, Draft Environmental Impact Statement, United States Department Of The Interior
Operation Of Glen Canyon Dam, Draft Environmental Impact Statement, United States Department Of The Interior
All U.S. Government Documents (Utah Regional Depository)
This draft environmental impact statement (EIS) analyzes the impacts of operations from 1963 to 1990 (baseline conditions) and alternative operations of Glen Canyon Dam on downstream environmental and cultural resources of Glen and Grand Canyons. Alternative operations evaluated include three that would provide steady flows; three that would provide various levels of fluctuating flows; and two, including no action, that would provide unrestricted fluctuating flows. Additional measures have been combined with the alternative operations, where appropriate, to provide additional resource protection or enhancement. The preferred alternative is the Modified Low Fluctuating Flow Alternative.
Zion Canyon Headquarters, Zion National Park, Utah, Draft Development Concept Plan, Environmental Assessment, United States Department Of The Interior, National Park Service
Zion Canyon Headquarters, Zion National Park, Utah, Draft Development Concept Plan, Environmental Assessment, United States Department Of The Interior, National Park Service
All U.S. Government Documents (Utah Regional Depository)
The study area, referred to as the headquarters area, incorporates the area from the south entrance station north to the Zion Canyon bridge. This includes the visitor center, the Watchman and South campgrounds, the amphitheaters, the nature center, the Oak Creek, Watchman, and Pine Creek residential areas, and the Oak Creek maintenance area. The study area encompasses approximately 325 acres. It includes a development zone (107 acres) and a natural zone (218 acres), and is surrounded by a proposed wilderness subzone.