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- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Speech by Carl T. Hayden offering a motion to authorize a road an trail construction program in Grand Canyon National Park "to make these natural wonders accessible to the American people." The speech appears in the Congressional Record, 68th Congress, First Session.
Amendments to the bill establishing the Grand Canyon a National Monument. Circa 1908.
Letter from George Otis Smith, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.
Letter from Carl Hayden to George Otis Smith asking his advice regarding the mining of asbestos deposits in the Grand Canyon.
Letter from George Otis Smith to Carl Hayden regarding mining rights in the Grand Canyon.
Letter from L. B. Williams to Carl Hayden regarding W. W. Bass' resistance to the park bill.
Letter from Harry Welch to Carl Hayden enclosing W. W. Bass' letter of protest against the proposed national park bill.