Recent Submissions

  • 96. Papers by R.L. Parshall [Folder 3 of 3] 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:1918-1950
    Writings and associated materials by Ralph Parshall, including the article "Fort Collins, Colorado" in "Colorado Federal Employee" Volume 2 Number 3 (start p.1), "The Interpretation of Errors" (start p.9), "Memorandum ...
  • 96. Papers by R.L. Parshall [Folder 1 of 3] 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:1918-1950
    Writings by Ralph Parshall, including sections of the "Fifty-Third Annual Report, Colorado Experiment Station, 1939-1940" that pertain to snow surveys and irrigation equipment (report start p.3, Parshall's sections start ...
  • 96. Papers by R.L. Parshall [Folder 2 of 3] 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959Lindley, E. S. (Edward Searles); Parsons, Floyd W., 1880-;
    Date:1918-1950
    Writings and associated correspondence by Ralph Parshall, including "The Use of the Improved Venturi Flume in the Distribution of Irrigation Water" (start p.2), "Hydraulic Laboratories of the Colorado Agricultural Experiment ...
  • 96. R.L. Parshall, folder 3 of 3 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:1923-1950
    Writings by Ralph Parshall, including "The Improved Venturi Flume" (start p.1), "The Improved Venturi Flume, Agricultural Program, KOA, March 18, 1927" (start p.11), "The Adjustable Tube Meter" (start p.20), "Hydraulics ...
  • 96. R.L. Parshall, folder 1 of 3 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:1923-1950
    Writings and associated correspondence by Ralph Parshall, including "Riffle Deflectors and Vortex Tubes Remove Suspended Silt and Sand" (start p.8), "Measurement of Debris-laden Stream Flow with Critical-depth Flumes ...
  • 94. Notes on Measuring Irrigation Deliveries, 1925 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:undated
    Typed and handwritten bibliographic citations for publications relating to measuring irrigation water gathered by Irrigation Investigations Unit staff members. Articles cited are from Engineering News, various state ...
  • 96. R.L. Parshall, folder 2 of 3 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:1923-1950
    Writings by Ralph Parshall, including "What About the Future Engineer" (start p.1), "The Importance of Return Flow to Colorado Irrigators" (start p.5), "Special Problems Concerning the Parshall Measuring Flume" (start ...
  • 93. Control Weir Data, Progress Report, Dec. 1926 -- The Hydraulic Double Jump Flume, October 1925, work done by Rohwer and Parshall at Hydraulic Laboratory 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959Hinds, Julian, 1881-;
    Date:1925-1926
    Data, notes, correspondence between Ralph Parshall and Julian Hinds, and charts relating to jump flumes and control weir experiments.
  • 103. Irrigation in Colorado, May 1928 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:1928
    Typescripts, drafts, and correspondence relating to Ralph Parshall's paper, "Irrigation in Colorado," which he intended to present at the American Association for the Advancement of Science, Southwestern Division conference ...
  • 104. Water Stage Recording Instruments 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959Keller, O. B.; Kelsey, J. B.;
    Date:1921-1922
    Correspondence, receipts, and brochures for water-level recording instruments with which the Irrigation Investigations Unit conducted comparative tests. Companies include W. & L.E. Gurley, Keuffel & Esser Co., Leupold, ...
  • 102. Proposed Enlargement, Halligan Dam, North Poudre Irrigation Co. 

    Contributor:North Poudre Irrigation Company
    Date:1923
    Specifications and bid documents for the proposed enlargement of the North Poudre Irrigation Company's Halligan Reservoir Dam
  • 93. Control Weir Data, Progress Report, Dec. 1926 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959Cone, Victor M.; Hinds, Julian, 1881-; Stevens, J. C.;
    Date:1924-1927
    Data, correspondence between Ralph Parshall and J. C. Stevens, drafts, and final reports relating to single jump flumes and control weir experiments. Reports include Farmers' Bulletin 813 "Construction and Use of Farm ...
  • 100. Irrigation Pumping in Colorado, May 1928 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959McLaughlin, W. W.; Code, W. E. (William E.), 1891-;
    Date:1924-1929
    Correspondence, project outline, and associated materials related to the cooperative field study "Pumping for Irrigation and Drainage in Colorado" proposed by Ralph Parshall. Materials include letters related to the search ...
  • 99. Floor Area of the Civil and Irrigation Engineering Building, College Campus, April 1926 

    Contributor:Parshall, Ralph L. (Ralph Leroy), 1881-1959
    Date:1926-04
    Calculations and plans defining the total floor area of the Civil and Irrigation Engineering Building, Colorado Agricultural College. Building is now known as the Statistics Building.
  • 101. Simplex Valve and Meter Co., Brisbane and Peacock Instruments, May 1932 

    Contributor:Peacock, Frank E.Parshall, Ralph L. (Ralph Leroy), 1881-1959;
    Date:1932
    Plans for the Parshall Meter, also called an acre-foot integrating instrument, used to determine total discharge through the Parshall flume. Folder also includes a letter from Frank E. Peacock of Brisbane and Company, ...
  • 80001: Two men surveying for the Federal-State Cooperative Snow Surveys, Division of Irrigation, Soil Conservation Service, USDA 

    Contributor:James, J. G.; United States. Soil Conservation Service. Division of Irrigation
    Date:undated
    Stamp on back reads: "Official photograph. When used for publication credit J. G. James for Soil Conservation Service, USDA"
  • 785A62: "Cutting spelt" 

    Contributor:Unknown
    Date:undated
  • 700J01: "Divisor in lateral S.E. of Fort Collins, Colorado" 

    Contributor:Unknown
    Date:1916
    Rest of caption reads: "Showing poor design and operation, but a rather typical installation."
  • 700H4104: Ralph Parshall next to Parshall measuring flume 

    Contributor:Unknown
    Date:undated
    Sign reading "ARMCO Parshall Measuring Flume" next to Parshall
  • 750C01: "Furrow irrigation at Rockyford" 

    Contributor:United States. Department of Agriculture
    Date:undated

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