Filtering by
- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Gavin, J. E.
- Creators: National Park Service, U.S. Dept. of the Interior
- Creators: United States Geological Survey
- Creators: Mitchell, Walter
- Status: Published
Letter from J. E. Gavin to Louis C. Cramton regarding the Bright Angel Trail controversy, including newspaper clipping.
Letter from J. E. Gavin to Jesse L. Boyce regarding the TNT storage in the Grand Canyon. Gavin states that although acting director Arno B. Cammerer is confident in Superintendent Crosby's report concerning the legitimacy of the storage, he will continue to investigate the matter to ensure public safety.
Letter from J. E. Gavin on behalf of Carl Hayden writing in regards to the insurance claims filed with the National Park.
Letter from Walter Mitchell to Carl Hayden on building a Union Chapel in the Grand Canyon.
Geological examination of the park canyonland, with description of the rocks, water sculping process, volcanic cones and outflows, and land erosion. This edition is Volume 2, 1977 reprint, of the author's 1882 monograph. Includes 12 color maps, 10 color views and is number 280/1500.
Final environmental statement: proposed master plan, Grand Canyon complex, Arizona, John E. Cook as acting director for plan, book.
