Matching Items (3)
Filtering by
- All Subjects: Grand Canyon (Ariz.)
- All Subjects: Desert conservation
- Creators: Smith, George Otis
- Creators: Pima County (Ariz.). County Administration Office
ContributorsSmith, George Otis (Author)
Created1918-04-23
Description
Letter from George Otis Smith, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.
ContributorsSmith, George Otis (Author)
Created1918-05-01
Description
Letter from George Otis Smith to Carl Hayden regarding mining rights in the Grand Canyon.
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.