Filtering by
- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Battelle Memorial Institute. Technology Partnership Practice
- Creators: Goodman, Frank R.
- Creators: Breen, Fred S.
- Creators: McCutcheon, John T.
Letter from Fred Breen to Carl Hayden regarding the sale of Bright Angel Trail.
Letter from F. R. Goodman to Carl Hayden expressing Coconino County's interest in handing over Bright Angel Trail to the government provided a sufficient amount of money is appropriated to build a road from Maine to the Grand Canyon.
Letter from F. R. Goodman to Carl T. Hayden asking for clarification about the agreement to construct an approach road to the park
This plan was undertaken by the Arizona Department of Transportation Multimodal Planning Division Aeronautics Group to evaluate and recommend a terminal area layout to meet anticipated terminal area demands.
Description of traveling down Bright Angel Trail by donkey.
Cooperative National Park Resources Studies Unit for University of Arizona, effects on Glen Canyon Dam releases on Grand Canyon River trips, a technical report, vol. no. 16.