Matching Items (3)
Filtering by
- All Subjects: Hayden, Carl Trumbull, 1877-1972
- All Subjects: Desert conservation
- Creators: Riordan, M. J.
- Creators: Pima County (Ariz.). County Administration Office
ContributorsRiordan, M. J. (Author)
Created1924-03-17
Description
Letter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of Bright Angel Trail.
ContributorsRiordan, M. J. (Author)
Created1924-03-07
Description
Letter from Michael J. Reardon to Carl T. Hayden, in agreement with Ralph Cameron, asserting that Bright Angel Trail should not be sold from Coconino County to the United States.
ContributorsPima County (Ariz.). County Administration Office (Publisher)
Created2000-04
Description
Describes a number of streams within watershed planning units and prioritizing these streams according to their existing contribution to the overall conservation of biological diversity in Pima County. Over 50 percent of the priority streams within the County are found within the Altar Valley and the Cienega Rincon area.