Recent Submissions

  • 115. Memorandum on Flume or Pipe Construction, College Farm Ditch at Avon, Colo. 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Colorado Agricultural College
    Date:1925-1926
    Proposed pipeline to replace old wood flume in College Farm Ditch, estimate of cost, mechanical drawings of pipe and flume
  • 109. Longitudinal Draw-Down Weirs 

    Contributor:United States. Bureau of Public Roads
    Date:undated
    Longitudinal draw-down data
  • 114. Investigations of Model Dams 

    Contributor:Hinds, Julian; United States. Bureau of Public Roads
    Date:1925-1926
    Correspondence regarding investigation of model dams, materials, and observations, the proposed testing of models of arch dam in Colorado, approximate cost, and progress report
  • 110. Transcription of Flow Data -- Circular and Notch Weirs -- For Purdue Engineering Experiment Station, Lafayette, Ind. 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Colorado Agricultural Experiment Station
    Date:1927
    Laboratory tests on circular weirs and triangular notches and discharge measurements
  • 108. Design and Report, Evaporation Reservoir, Rohwer and Parshall 

    Contributor:Rohwer, Carl; Parshall, Ralph L. (Ralph Leroy), 1881-1959; United States. Bureau of Public Roads; Colorado Agricultural Experiment Station
    Date:1925-1926
    Report concerning proposed evaporation reservoir, estimate of cost in the construction of the basin, correspondence regarding proposed evaporation tank and studies, mechanical drawing of evaporation reservoir
  • 107. Irrigation in Colorado, Parshall, International Congress of Soil Science, Rocky Ford, Colo. 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Kidder, Waldo; United States. Bureau of Public Roads; United States. Department of Agriculture
    Date:1926-1927
    The Western Farm Life newspaper, Rocky Ford "The Pantry of Colorado" brochure, Tour and banquet in honor of Delegates to International Soil program, Irrigation in Colorado brochure and report drafts, The Official Record ...
  • 106. Discharge Data, Circular Weirs 

    Contributor:United States. Bureau of Public Roads; Colorado Agricultural Experiment Station
    Date:1913
    Transcription of discharge data for circular weirs
  • 121. Orchard Irrigation 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Fortier, Samuel; United States. Bureau of Public Roads; Colorado Agricultural Experiment Station
    Date:1925
    Orchard land field notes, outline of orchard irrigation, report on orchard irrigation in Colorado in Canon City district, correspondence regarding the revision of "Irrigation of Orchards"
  • 105. Report of Tests on Great Western Irrigation Meter, Dec. 1923 -- 1924 Curves 

    Contributor:Unknown
    Date:1923-1924
    Charts showing discharge, indicator wheel revolutions, percent of error to the upper head and head, and submergence measurements
  • 117. Proposed Projects, Agricultural Engineering 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; United States. Bureau of Public Roads
    Date:1926
    Information requested for proposed projects in agricultural engineering and lists of proposed subjects for research work
  • 118. Soils of the Arkansas Valley in Colorado by A.T. Sweet 

    Contributor:Sweet, A. T.; United States. Bureau of Public Roads
    Date:undated
    Report on soils of the lower Arkansas Valley of Colorado and Soils of the San Luis Valley, Colorado report, and copy of United States Department of Agriculture of Soils memorandum
  • 119. Soil Moisture Lecture prepared for field men, Great Western Sugar Co. Presented at Greeley Jan. 14 and at Loveland Jan. 15, 1926, by R.L. Parshall 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; United States. Bureau of Public Roads; United States. Department of Agriculture
    Date:1926-1927
    Includes "Report on the Agricultural Experiment Stations, 1927," pages 87-96 only scanned
  • 116. Headgate Improvement at Bellvue Hydraulic Laboratory 

    Contributor:United States. Bureau of Public Roads
    Date:1926
    Photograph of headgate at Bellvue Laboratory and letter regarding improvements made to headgate
  • 105. Report of Tests on Great Western Irrigation Meter 

    Contributor:United States. Bureau of Public Roads
    Date:1923-1924
    U. S. Department of Agriculture Bureau of Public Roads reports of tests on Great Western Irrigation Meter. Includes 2 folded posters for Great Western Irrigation Co.
  • 306. Mms. "Irrigation Wells," Carl Rohwer, 1936 

    Contributor:Rohwer, Carl
    Date:1934-1938
    Two drafts of "Irrigation Wells" by Carl Rohwer and associated notes. This report was published in 1940 as "Putting Down and Developing Wells for Irrigation." A brochure and a map for the Salt River Project, Arizona, is ...
  • 305. Yellow Copy, Mms. "Irrigation Wells," Carl Rohwer, 1936 

    Contributor:Rohwer, Carl
    Date:1936
    Draft of "Irrigation Wells" by Carl Rohwer and correspondence from irrigation experts, including O. W. Israelsen and M. R. Lewis, with suggested changes to the manuscript. This report was published in 1940 as "Putting Down ...
  • 304. Pencil Copy, Manuscript on Irrigation Wells, Carl Rohwer, December 1935 

    Contributor:Rohwer, Carl
    Date:1936
    Handwritten draft of "Irrigation Wells" by Carl Rohwer. This report was published in 1940 as "Putting Down and Developing Wells for Irrigation."
  • 303. Measuring Devices, Big Laramie River Basin, 1936 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959Hinderlider, M. C. (Michael Creed), 1876-1967;
    Date:1936
    Two memoranda by Ralph Parshall, "Memorandum Concerning Suggestions and Recommendations for Headgates and Measuring Devices for Ditches in the Big Laramie River Basin in Colorado" and "Memorandum Relative to Improvements ...
  • 302. Miscellaneous Data, Irrigation Well Report, Dec. 1935 

    Contributor:Rohwer, Carl
    Date:1932-1935
    Correspondence, proposed outlines, drilling and pumping machinery company brochures, The Johnson National Drillers' Journal, Vol. 7, No. 5 (September-October 1935), and data collected for Carl Rohwer's report "Irrigation ...
  • 301. Pipe Flume, 1935 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959; Palmer, Harold K.; Bowlus, Fred D.; American Society of Civil Engineers
    Date:1932-1935
    Proceedings of the American Society of Civil Engineers, Vol. 61, No. 7 (September 1935), which includes "Adaptation of Venturi Flumes to Flow Measurements in Conduits" by Harold K. Palmer and Fred D. Bowlus. Ralph Parshall's ...

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