Filtering by
- All Subjects: Hayden, Carl Trumbull, 1877-1972
- All Subjects: Desert conservation
- Creators: Lane, Franklin K.
- Creators: Fechner, Robert
- Creators: Jones, Cory
- Creators: R. P. Gilliland, R. P. Gilliland
Letter from R.P Gilliland to Carl Hayden regarding the sale of Bright Angel Trail (Ariz.) and construction of the President's Highway from Maine, AZ, to the Grand Canyon.
Letter from Franklin K. Lane to Carl T. Hayden expressing his support for bill S.390 in establishing the Grand Canyon as a National Park.
Letter from Franklin K. Lane expressing his support for bill S.390 in establishing the Grand Canyon as a National Park. Circa 1913-1920.
Letter from Robert Fechner to Carl Hayden on building a Union Chapel in the Grand Canyon.
This report examines how effectively Pima County’s natural open-space acquisitions have addressed priorities for conserving species’ habitats and landscape features identified in the Sonoran Desert Conservation Plan. The scope of this study is beyond the County's Multi-Species Conservation Plan, which is a subset of the overall Sonoran Desert Conservation Plan.