Includes "copy of the English text of the Priest-Favela report of the conditions of the Lower Colorado River. The missing pages are the Spanish text," (quotation from preliminary pages); "Report on the conditions of the Lower Colorado River for the International Water Commission, United States and Mexico," by Ray M. Priest and J.L. Favela, August 1930. Photos and plates missing.

Also includes "Minutes of the meetings of the International Water Commission, United States and Mexico, pertaining to the Colorado River - November 1930 to April 28, 1931 (last meeting)."