Letter from Joseph J. Cotter to Carl Hayden regarding the use of water power and summer homes in the proposed park boundaries.
Letter from Joseph J. Cotter to Carl Hayden providing a rebuttal to W. W. Bass' objections to the Grand Canyon National Park Bill.
Testimony for The Subcommittee on National Parks, Forests and Public Lands of the Committee on Natural Resources presented against the withdrawal of the uranium-bearing lands around the Grand Canyon National Park.
Letter from Joseph J. Cotter to Carl Hayden detailing the approximate amount of patented land within the proposed borders of the national park. Thomas J. Croaff is mentioned in his belief that he owns half the land in the proposed area; however, Joseph J. Cotter disputes this claim. Ralph Cameron's mining interests in the park are also mentioned. Circa 1917.
Regional benefits of the Rosemont Project are discussed in greater detail in the Economic Impacts Report prepared by the Seidman Institute of the Arizona State University that is part of this document. It covers Pima and Santa Cruz Counties; the major benefits accruing to Pima County.