• Venturi flume, The 

        Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Rohwer, Carl
        Date:1921
      • Improved Venturi flume, The 

        Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Colorado Agricultural and Mechanical College. Department of Civil Engineering
        Date:1928
        Based on data gathered under cooperative agreement between Bureau of Public Roads, United States Department of Agriculture, and Colorado Agricultural Experiment Station.
      • Parshall flumes of large size 

        Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
        Date:1932
      • Improving the distribution of water to farmers by use of the Parshall measuring flume 

        Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Colorado Agricultural and Mechanical College. Department of Civil Engineering
        Date:1945
      • Canal lining manual 

        Contributor:Unknown
        Date:1946
        All images are reproduced in the Colorado Agricultural Experiment Station publication, Canal Lining Manual, by Carl Rohwer, 1946
      • Siphonic sand trap 

        Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
        Date:1955
        Memorandum on using siphonic sand traps to solve the bed load problem at the head of the main canal diverting from the Rio Grande