Guide to the Ralph L. Parshall Collection

Prepared by Holley R. Lange; revised by Patricia J. Rettig
Colorado State University Water Resources Archive
A joint effort of the University Libraries and the Colorado Water Institute
Copyright 2017 Colorado State University. All rights reserved.
Finding aid encoded in EAD Version 2002 by Holley R. Lange, 2005.
Creator: Parshall, Ralph L. (Ralph Leroy), 1881-1959
Title: Ralph L. Parshall Collection
Dates: 1888-1992
Bulk: 1921-1961
Quantity: 11.5 linear feet
Identification: WRLP
Abstract: Ralph Parshall contributed significantly to the field of irrigation engineering with the development of a flow-measuring device that became commonly known as the Parshall flume and continues to be widely used. Materials in the collection include Parshall's patent on his "Venturi flume water stage recording instruments," awards that Parshall received, publications, copies of talks he presented on KOA radio in Denver, and a number of lantern slides depicting flumes, weirs, plans, and various graphs and tables. The collection also contains some materials related to Parshall's son, Maxwell Parshall, as well as to Carl Rohwer, a colleague in the Division of Irrigation at the U.S. Department of Agriculture.
Contact Information: Water Resources Archive
Archives and Special Collections
Morgan Library
Colorado State University
Fort Collins, Colorado 80523-1019 USA
Phone: 970-491-1844
Fax: 970-491-1195
Email: library_dl_specialcollections@mail.colostate.edu
URL: https://lib.colostate.edu/water
Restrictions on Access
There are no access restrictions on this collection.
Restrictions on Use
Not all of the material in the collection is in the public domain. Researchers are responsible for addressing copyright issues.
This collection is indexed under the following headings in the Colorado State University Libraries online catalog. Researchers seeking materials about related subjects, persons, organizations, or places should search the catalog using these headings.
Subjects:
  • Parshall flume.
  • Flumes.
  • Weirs.
  • Snow surveys.
Persons:
  • Parshall, Ralph L. (Ralph Leroy), 1881-1959.
  • Parshall, Maxwell.
  • Rohwer, Carl.
Organizations:
  • Colorado Agricultural College.
  • United States. Department of Agriculture.
Places:
  • Fort Collins (Colo.)
  • South Platte River Watershed (Colo. and Neb.)
  • San Luis Valley (Colo. and N.M.)
Occupations:
  • Irrigation engineers.
Special Document Types:
  • Lantern slides.
  • Photographs.
  • Motion pictures (visual works).
Ralph Leroy Parshall, engineer, contributed significantly to the field of irrigation engineering with the development of a flow-measuring device that became known as the Parshall flume and continues to be widely used. A Colorado native, Parshall was born in Golden on July 2, 1881. He received his B.S. in civil and irrigation engineering from Colorado Agricultural College (now Colorado State University) in 1904. During the summers of 1906 and 1907 he pursued graduate work at the University of Chicago. At Colorado Agricultural College, he was an instructor in physics and civil engineering between 1904 and 1909 and then assistant professor from 1909 to 1913. In 1913 he was appointed assistant engineer and director of irrigation investigations with the Division of Irrigation, Soil Conservation Service, U.S. Department of Agriculture, then housed at the college. In 1918 he became director of the program and served in that capacity until he retired in 1948 with the title of Senior Engineer. Even in retirement he continued as researcher, consultant, and sometimes lecturer at the college.
While Parshall's flume was his most notable work, he also investigated a number of irrigation-related problems. He designed and built various irrigation recording instruments and meters, such as those used in concert with the Parshall flume, and developed sand traps such as the vortex tube and riffle deflector. Parshall participated in surveys and planning for the Colorado-Big Thompson Project, and during the 1940s was survey supervisor for an investigation of snow measurement methods and work relating water content of snowpack to irrigation water supply.
Parshall was honored as a Life Member of the American Society of Civil Engineers, as well as a Life Member of the Colorado Society of Engineers. He was also honored with a lifetime achievement award from the Alumni Association of the Colorado Agricultural College in 1942. He received a special citation and medal from the U.S. Department of Agriculture at his retirement in 1948, and a gold medal award from the Colorado Engineering Council in 1949.
Parshall married Florence May Stuver in 1906 and had two sons: Maxwell and Deane. Ralph Parshall died in Fort Collins, Colorado, on December 29, 1959.
Maxwell Parshall was born in Colorado on March 11, 1907. He attended Colorado Agricultural College and the Massachusetts Institute of Technology, receiving his B.S. in chemistry from MIT in 1929. After graduation he worked in Colorado, first for the State Dairy Commission and later for the U.S. Department of Agriculture. In 1937 he began working at Colorado State College (now CSU) in Fort Collins, serving with the Civil Engineering Department and for a number of years heading the weather station there. He remained at the college for more than 30 years. Parshall died in Billings, Montana, on January 30, 1996.
Carl Rohwer, born in Nebraska in 1890 and graduated from Cornell in 1913, joined Ralph Parshall at the USDA in Fort Collins in 1914. The two worked together on many projects, studying evapotranspiration, water flow measurement, water well designs, and ditch seepage. Rohwer became the leader of the research group after Parshall retired, until his own retirement in 1956. He died in 1958.
The Ralph L. Parshall Collection consists of documents dated 1888 to 1992, with the bulk falling from 1921 to 1961. While Parshall is the focus of the collection, there is relatively little personal correspondence and few of his personal files are contained here. The collection does include Parshall's patent on the water stage recording instruments used with his flume, awards he received, publications, copies of talks he presented on KOA radio in Denver, and data and multiple drafts from his study of seepage in the South Platte Basin. Additionally, media types include photographs of Parshall, a number of lantern slides depicting flumes, weirs, plans, graphs, and tables, and a 16mm film on snow measurement. Included as well are some materials related to Carl Rohwer, who joined the Division of Irrigation in the U.S. Department of Agriculture in 1914. These mostly concern a project in the San Luis Valley. The collection also contains some files from Maxwell Parshall, including correspondence, data,a tape, and a transcript of the tape.
The collection consists of 4 series in 15 boxes and 10 oversize folders:
Preferred Citation

Ralph L. Parshall Collection, Water Resources Archive, Colorado State University.

Acquisition

The Ralph L. Parshall Collection was acquired from various sources over time, with one addition received from Robert Ward on July 23, 2003. This included books, certificates, letters, photographs, and slides. The addition of the current meters was received from Everett Richardson on January 6, 2011. Additional materials, including drafts, drawings, photographs, publications, and clippings, were discovered at the Engineering Research Center and transferred to the Archive in November 2011. Letters sent by Parshall to the Elliot family were donated by Judy Elliot Riggenbach in June 2017. An artifact associated with Max Parshall was transferred from the Irrigation Photograph Collection in July 2017.

Processing

The initial processing of the collection was completed in February 2005. Materials were placed in acid-free folders and metal fasteners were removed. Newspaper clippings were inserted between sheets of acid-free paper. Framed certificates and letters were removed from the frames. Loose photographs and negatives were separated to Series 3 and inserted in archival sleeves, envelopes, or folders. The film reel was housed in its own archival box, as was the cassette tape. Some publications were removed and added to Archives and Special Collections. The current meters were incorporated in October 2011. The materials found at the Engineering Research Center were incorporated in December 2012. Materials received in 2017 were incorporated in July 2017.

Separated Collections

The following item was transferred to the Groundwater Data Collection: Quadrangle sheets. Northeastern Colorado. Colorado Water Conservation Board. 1939.

The following materials were transferred to the Papers of Louis G. Carpenter: Lantern slides Zola Dam. 1892.

The materials found at the Engineering Research Center included documents related to Ralph Parshall, Maxwell Parshall, and Carl Rohwer, all added to this collection based on its existing contents. Materials found at the same time related to Louis Carpenter were transferred to that collection; those related to William Code were transferred to the Groundwater Data Collection. If associations were unclear, materials were kept in this collection.

Related Collections

The Water Resources Archive contains the Irrigation Research Papers, which documents extensively the research of the Irrigation Investigations Unit of the U.S. Department of Agriculture in Fort Collins, Colorado, including Ralph Parshall's work on the Parshall flume. The Water Oral Histories Collection contains a 1986 tape recording by Maxwell Parshall, in which he describes work he did for the Water Supply and Storage Company and Colorado State University.

Online Materials

Some materials have been scanned and are available through the Colorado State University Libraries website. In the electronic version of this document, direct links appear in context. Note that not all links are to the exact documents in this collection, but scans from other sources.

Note: Title information supplied by the archivist is bracketed. Estimated pagination is preceded by an "e." Two identical copies of the same item are indicated by the phrase "2 copies" at the end of the entry, following the number of pages of each copy. Authored articles, books, and studies are listed in bibliographic form.

Series 1: Papers, 1909-1992 and undated (3.25 linear feet)

This series consists of materials by and about Ralph Parshall, including the patent on his Venturi flume water stage recording instruments, information and correspondence on awards he received, and copies of talks he presented on KOA radio in Denver. Also here are several drafts along with associated data and charts related to his study of seepage in the South Platte Basin. Additionally, there are materials related to Parshall's son, Maxwell Parshall, as well as to Carl Rohwer, a colleague in the USDA Division of Irrigation. The latter set of files largely relates to research in the San Luis Valley and includes letters from Parshall. Files are arranged alphabetically by title, except for the Rohwer files which are roughly chronological.
Box Folder
1 1 Alumni Association Banquet and Ball invitation. 1913. 1p. VIEW
1 2 Alumni Association certificates. 1954. 2pp. VIEW
9 1 Articles on Parshall and flume. 1930, 1960. 10pp.
1 3 Burgess-Manning - Parshall correspondence. 1959. 6pp. VIEW
1 4 Certificate of Fellowship in American Association for the Advancement of Science. 1923. 2pp. VIEW
9 2 Certificates. 1913, 1948, 1953. 3pp.
ASCE diploma, USDA award, State of Colorado professional engineer certificate.
1 5 Civil Service application. 1913. 4pp. VIEW
9 3 Clippings on naming of Parshall flume. 1930. e50pp.
9 4 Collection inventory and related items. 1966-1967, undated. 8pp.
1 6 Colorado Engineering Council award. 1949-1950. 16pp. VIEW
9 5 Current meter notebook [blank]. undated. 1 item
1 7 Electrical precipitator. 1957. 6pp. VIEW
1 8 Headgate award. 1958. 1p. VIEW
1 9 Historical information on Max Parshall and Hunter Rouse. 1976-1985. e140pp. VIEW
1 10 KOA radio talks. 1931-1935. e50pp. VIEW
1 11 Letters of membership acceptance in ASCE. 1913, 1933. 6pp. VIEW
9 6 Letters on naming of Parshall flume. 1930. 9pp. VIEW
1 12 Letters on occasion of Parshall's retirement. 1948. 7pp. VIEW
11 6 Letters to the Elliot family. 1956-1960. e15pp.
1 13 Maxwell Parshall. 1956-1963. e50pp. VIEW
9 7 Maxwell Parshall: Snow course data. 1938. e20pp.
9 8 Maxwell Parshall: Weather observations, Fort Collins. 1940-1941. 6pp.
1 14 Membership cards. 1920-1959. 6pp. VIEW
9 9 Miscellaneous letters. 1919, 1939. 10pp.
9 10 Miscellaneous maps. 1909, 1936, undated. 6pp.
Includes Monte Vista, Rio Grande Canal System, and St. Charles Mesa (near Pueblo).
1 15 Notes concerning current meters. c. 1920. e50pp. VIEW
1 16 Palmer-Bolus flume. 1953. 10pp. VIEW
1 17 Parshall, Ralph L. Siphonic sand trap. 1955. 12pp. VIEW
1 18 Parshall, Ralph L. Water problem. Talk before Rotary Club. 1956 August 19. 9pp. VIEW
1 19 Parshall, Ralph L. Water stage recording instruments. 1923. 31pp. VIEW
1 20 Parshall and Carl Rohwer information. 1982. 7pp. VIEW
1 21 Parshall flume. 1959-1975. e40pp. VIEW
1 22 Parshall flume [exhibit]. 1992. 7pp. VIEW
1 23 Parshall miscellaneous documents. 1914-1985. e40pp. VIEW
1 24 Professional bibliography R.L. Parshall. [General overview of his work]. 1958. 11pp. VIEW
1 25 Quotations. undated. 7pp. VIEW
1 26 Rohwer/Blaney evapo-transpiration correspondence. 1953. 9pp. VIEW
1 27 Rohwer well screen correspondence. 1947-1954. e80pp. VIEW
Rohwer files.
10 1 Reinhardt lettering plates. 1916-1917. e20pp.
10 2 War Department letters. 1917. e20pp.
10 3 San Luis Valley project. 1936. e120pp.
10 4 Telegrams. 1936. e60pp.
10 5-6 Copies of correspondence. 1936. e300pp.
10 7 Receipt book. 1936. e50pp.
10 8 Memoranda. 1936-1937. e150pp.
10 9 Obligation reports, expense accounts. 1936-1937. e150pp.
11 1-2 Rio Grande investigations. 1935-1937. e300pp.
11 3 San Luis Valley correspondence. 1935-1937. e250pp.
11 4-5 Supplemental irrigation. 1936-1937. e350pp.
South Platte Project.
Files relate to Parshall's publication "Return of seepage water to the Lower South Platte River in Colorado," 1922.
9 11 Planning. 1919, undated. e30pp.
9 12 Research notes. undated. e30pp.
9 13 Data and charts. 1920-1921. e100pp. including folded oversize
14 1 Data and charts. 1919-1921. e50pp., folded oversize
9 14 Drafts - handwritten. undated. e130pp.
9 15 Drafts - typed. c. 1921. e80pp.
14 2-3 Drafts - typed. c. 1921. e100pp., oversize
1 28 Speech and note from G. H. Palmes on Parshall. 1949. 5pp. VIEW
1 29 U.S. Department of Agriculture service award. 1948. 12pp. VIEW
1 30 Venturi flume water stage recording instruments, patent no. 1417941. 1922. 11pp. VIEW


Series 2: Publications, 1902-1962 and undated (0.5 linear feet)

This series consists of Parshall's publications, as well as publications by others used by Parshall or otherwise related to his work. It is arranged in two subseries.
Box Folder
Subseries 2.1: Publications by Parshall. 1921-1961.
The publications include discussions of Parshall's flume, water flow measurement, and irrigation issues. The articles are arranged alphabetically by title.
2 1 Parshall, Ralph L. The improved Venturi flume. Fort Collins, Colo.: Colorado Experiment Station, Colorado Agricultural College. Bulletin 336. 1928 March. 83pp. VIEW
2 2 Parshall, Ralph L. The improved Venturi flume: a device for the measurement of water flowing in open channels. Fort Collins, Colo.: Colorado Experiment Station. Press Bulletin no. 60. 1925 January. 7pp.
2 3 Parshall, Ralph L. Improving the distribution of water to farmers by use of the Parshall measuring flume. Fort Collins, Colo.: Colorado Agricultural Experiment Station, Colorado A and M College. Bulletin 488. 1945 May. 54pp. VIEW
2 4 Parshall, Ralph L. Irrigation in Colorado. Fort Collins, Colo.: Colorado Experiment Station. 1927 June. 16pp.
2 5 Parshall, R. L. Measuring water in irrigation channels. Washington, D.C.: U.S. Dept. of Agriculture. Farmers' Bulletin no. 1683. 1932 January. 17pp.
2 6 Parshall, R. L. Measuring water in irrigation channels with Parshall flumes and small weirs. Washington, D.C.: Soil Conservation Service, U.S. Dept. of Agriculture. Soil Conservation Service Circular no. 843. 1950 May. 62pp. 2 copies
2 7 Parshall, R. L. Parshall flumes of large size. Fort Collins, Colo.: Colorado Agricultural Experiment Station, Colorado Agricultural and Mechanical College. Bulletin 426-A (reprint of Experiment Station Bulletin 38G). 1953 March. 40pp.
2 8 Parshall, Ralph L. Parshall flumes of large size. Fort Collins, Colo.: Agricultural Experiment Station-Agricultural Extension Service cooperating, Colorado Agricultural and Mechanical College. Bulletin 426-A. 1953 May. 39pp.
2 9 Parshall, Ralph L. Parshall flumes of large size. Fort Collins, Colo.: Agricultural Experiment Station, Agricultural Extension Service cooperating, Colorado State University. Bulletin 426-A. 1961 June. 39pp. 2 copies
2 10 Parshall, Ralph L. Parshall measuring flume. Fort Collins, Colo.: Colorado State College, Colorado Experiment Station. Bulletin 423. 1936 March. 84pp. VIEW
2 11 Parshall, Ralph L. Return of seepage water to the Lower South Platte River in Colorado. Fort Collins, Colo.: Agricultural Experiment Station, Colorado Agricultural College. Bulletin 279. 1922 December. 72pp. VIEW
2 12 Parshall, Ralph L. and Carl Rohwer. Venturi flume. Fort Collins, Colo.: Agricultural Experiment Station, Colorado Agricultural College. Bulletin 265. 1921 February. 28pp. VIEW
Subseries 2.2: Publications by others. 1902-1962 and undated.
These publications range from Trautwine's 1902 Civil Engineer's Pocket-Book, to works about flumes, both Parshall's and others, and other water measuring methods. The items are arranged alphabetically by author.
9 16 Agricultural Experiment Station of the Colorado Agricultural College. The Plains: some press bulletins. Fort Collins, Colo.: Experiment Station. Bulletin 123. 1908. 32pp.
9 17 American Geophysical Union snow reports. 1936-1938. e100p.
The last two items contain brief reports by Parshall.
2 13 Azevedo Netto, Jose M. Medidores do regimen critico - medidores Parshall. Separata da Boletim R.A.E., No. 24, ano XIV. 1952 December. 17pp.
9 18 Bernard, Merrill. Recent developments in mountain snowfall work of the Weather Bureau. 1938. e20pp.
2 14 Burnham improved submerged orifice water measuring device. Denver, Colo.: Hardesty Mfg. Co. Circular F-4. 1921. 29pp.
9 19 Colorado Society of Engineers. Official bulletin. No. 37 to 40. 1921 September. 8pp.
2 15 Dixon, Stephen Mitchel and Frederic William Macaulay. Measurements of discharge over a rock-faced dam. London: Institution of Civil Engineers. Excerpt Minutes of Proceedings of the Institution of Civil Engineers, session 1924-1925, paper no. 4515. 1924. 15pp.
9 20 Fort Morgan Reservoir and Irrigation Co. Secretary's and treasurer's reports, fiscal year ending January 6, 1919. 1919. 3pp.
2 16 Gibson, Arnold Hartley. The investigation of the surge-tank problem by model experiments. London: Institution of Civil Engineers. Excerpt Minutes of Proceedings of the Institution of Civil Engineers, session 1924-1925, paper no. 4523. 1925. 15pp.
9 21 Horton, Robert E. Some broader aspects of rain intensities in relation to storm sewer design. Reprinted from Municipal and County Engineering. 1919. 12pp.
2 17 Kennedy, R. G. Kennedy gauge outlet. St. Louis: W.N. Matthews and Brother. 1910. 26pp.
2 18 Lacey, Gerald. Stable channels in alluvium. London: Institution of Civil Engineers. Excerpt Minutes of Proceedings of the Institution of Civil Engineers, vol. 22, session 1929-1930, paper no. 4736. 1930. 36pp.
2 19 Lacey, Gerald. Stable channels in alluvium. London: Institution of Civil Engineers. Excerpt Minutes of Proceedings of the Institution of Civil Engineers, vol. 22, session 1929-1930, pt. 1, paper 4736. 1930. p. 259-384
2 20 Robinson, A. R. Parshall measuring flumes of small size. Fort Collins, Colo.: Colorado Agricultural and Mechanical College, Agricultural Experiment Station. Technical Bulletin 61. 1957 January. 12pp.
2 21 Robinson, A. R. Water conveyance and measurement. Fort Collins, Colo.: Colorado State University. Colorado Progress Report, PR 67. 1962 December. 2pp.
9 22 Rohwer, Carl. The farmer's short-box measuring flume. Washington, D.C.: U.S. Dept. of Agriculture. Bulletin no. 1110. 1922 October. 15pp.
9 23 Stewart, George Walter. Research in state universities. undated. 2pp.
2 22 Trautwine, John C. Civil engineer's pocket-book. Rev. by John C. Trautwine, Jr. and John C. Trautwine, 3d. 18th ed. New York: John Wiley and Sons. 1902. 1,079pp.
2 23 Venturi irrigation meter. Providence, R.I.: Builders Iron Foundry. undated. 12pp.
2 24 Venturi irrigation meter. Providence, R.I.: Builders Iron Foundry. 1914. 22pp.


Series 3: Visual and audio materials, 1888-1992 and undated (2.5 linear feet)

This series contains the photographic, audio, and visual materials in the collection. It is arranged in two subseries.
Box Folder
Subseries 3.1: Photographic materials. 1888-1992 and undated.
This subseries contains a variety of photographs, several of which are of Parshall. The arrangement is by format type, including photographs, glass plate negatives, lantern slides, and modern slides. A small set of photographs/negatives is arranged chronologically; another larger one is arranged alphabetically. The latter contains numerous images related to seepage, some related to Rohwer's study of canal linings, some of Parshall, and some of the North Poudre Canal. The lantern slides depict flumes and weirs, water measuring devices, and a variety of graphs, tables and maps; the slides also depict flumes, weirs, graphs, tables, and drawings. Some are from Parshall's publications. Lantern slides are numbered consecutively and groupings reflect original containers. Conventional slides are inserted in slide holders and groupings reflect original containers.
2 Photographs/negatives: Chronological.
2 25 Portrait of Parshall. 1942. 1 copy negative
2 26 Parshall--Measuring water in irrigation channel. 1946. 1 negative; 1 modern print VIEW
2 27 Parshall, Washington DC. 1948. 1 photograph VIEW
2 28 H. Rouse and others. 1949. 3 photographs, 7 corresponding/similar negatives
#1. H. Rouse, Bakhmeteff, Dr. Straub. #2. B.C. Keene, W.L. McInnes, A.W. Maxwell, R.G. Cos, E.P. Fortson, Lt.Col. R.D. King, Dr. H. Rouse, J.B. Tiffany, Jr., Dr. Boris A. Bakhmeteff, G.B. Tenwick, E.B. Lipscomb. #3. No label [appears to be: unknown, Rouse, Bakhmeteff, unknown, unknown].
2 29 Parshall's medals, flume exhibit. 1992. 10 photographs VIEW
2 30 John R. Freeman. undated. 6 portraits on 1 sheet
Photographs: Alphabetical.
12 1 Canal lining manual. c. 1946. 37 photographs VIEW
All are reproduced in Canal lining manual by Carl Rohwer, 1946. Many of them have accompanying captions.
9 24 Clouds. undated. 1 photograph
12 2 Miscellaneous photographs. 1900-1901, undated. 7 photographs VIEW
Contains portrait of John Henry Nelson, unidentified building, Colorado Plains Substation, ship, masonry dam in Holyoke, Massachusetts, and plants in field.
12 3 North Poudre Canal. c. 1888-1894. 7 photographs VIEW
12 4 Parshall. 1946, undated. 12 photographs VIEW
13 1 Seepage measurement. 1922-1926, undated. 64 photographs
Photos are mostly of irrigation canals and a few dams in various California locations. Also includes Berkeley campanile. Some were compiled for a publication and have captions.
9 25-26 Glass plate negatives: Alta East Branch. undated. 2 items
1 corresponding print in Box 13
Lantern slides.
25 lantern slides: original container labeled "Lantern slides, R.L. Parshall, College, Fort Collins, Aug. 19, 1950, #2"
3 1 "Making drainage canal with skid dredge (Dup.)". VIEW
3 2 Two men, 2 horses. VIEW
3 3 Canal. Horse. VIEW
3 4 Graph. "Free flow discharge curve". VIEW
3 5 Water flow structure (possibly weir). VIEW
3 6 Measuring device. Top left corner cracked VIEW
3 7 Water flow structure (possibly weir). Top left corner cracked VIEW
3 8 Flume. VIEW
3 9 Flume. VIEW
3 10 Flume. VIEW
3 11 Measuring device. VIEW
3 12 Flume under construction. VIEW
3 13 Graph. "Comparison based on 100 laboratory tests". VIEW
3 14 Water flow structure. VIEW
3 15 Map of Northern Colorado. "7". VIEW
3 16 Map of Northern Colorado. "6". VIEW
3 17 Map of Northern Colorado. "5". VIEW
3 18 Map of Northern Colorado. "4" Legend: Windsor Reservoir, Windsor Lake. VIEW
3 19 Map of Northern Colorado. "3". VIEW
3 20 Map of northern Colorado. "2" Legend: Direct flow, direct flow and storage. VIEW
3 21 Map of northern Colorado. "1". VIEW
3 22 "Gasberg flume. Modesto. To be replaced by hydraulic fill". VIEW
3 23 Ditch/weir. Top right corner cracked VIEW
3 24 "Irrigating citrus orchard by 4 deep furrows. Dup.". VIEW
3 25 Field. VIEW
3
26 lantern slides: original container labeled "#1"
3 26 Ditch/flume. VIEW
3 27 Halligan Dam. VIEW
3 28 Vertical float-activated water-level recorder. VIEW
3 29 Measuring device. VIEW
3 30 Water meter. VIEW
3 31 Gurley water-level recorder with floats. VIEW
3 32 Measuring device. VIEW
3 33 Graph. "South Reservation Ditch on July 19, 1920". VIEW
3 34 Drawing. "One foot improved Venturi flume. Nov. 1924". VIEW
3 35 Water flow structure, man. VIEW
(Large headgates on the Rio Grande Canal--from Parshall's Irrigation in Colorado, p. 5)
3 36 Cache la Poudre River. VIEW
(Headwaters of the Cache La Poudre River--from Parshall's Irrigation in Colorado, p. 4)
3 37 Snow/mountains. VIEW
(Snow on Continental Divide--on cover of Parshall's Irrigation in Colorado)
3 38 Flume. VIEW
3 39 Flume. VIEW
3 40 Flume. VIEW
3 41 Flume. VIEW
3 42 Diversion dam. VIEW
3 43 River, buildings. Irrigation Investigation area. VIEW
3 44 Building: Irrigation Investigation, Colorado Experiment Station/USDA. VIEW
3 45 Drawing of flume. Upper left corner cracked VIEW
3 46 Flume. VIEW
3 47 Flume. VIEW
3 48 Flume. VIEW
3 49 Flume, in building. VIEW
3 50 Scene including Irrigation Investigation building. Cracked across top VIEW
3 51 Scene including Irrigation Investigation building (different view than #50). VIEW
24 lantern slides: original container labeled "sand traps" (Parshall's writing)
3 52 Sand trap, dog, buildings. VIEW
3 53 Riffle deflector sand trap. VIEW
3 54 Riffle deflector sand trap. VIEW
3 55 "Cross section of tube". VIEW
3 56 River/stream. Water flow structure. Four men on structure. VIEW
3 57 Same structure, different view. Three men on structure. VIEW
3 58 Same structure, different view. VIEW
3 59 Man lifting piece of structure. VIEW
3 60 Structure under construction. VIEW
4 61 Drawing. "Riffle deflector-vortex tube sand trap and 40-foot Parshall measuring flume". Tape loose on slide VIEW
4 62 Riffle deflector sand trap. VIEW
4 63 Sand trap. VIEW
4 64 Drawing. Sand trap. VIEW
4 65 Sand trap. VIEW
4 66 Sand trap. VIEW
4 67 Riffle deflector sand trap. VIEW
4 68 Riffle deflector sand trap. VIEW
4 69 Muddy stream bed and wooden structure. VIEW
4 70 Water flowing through wooden structure. VIEW
4 71 Water flowing through vortex tube sand trap next to Irrigation Investigation building. VIEW
4 72 Vortex tube sand trap next to Irrigation Investigation building. VIEW
4 73 Water flowing through vortex tube sand trap. VIEW
4 74 Water flowing through vortex tube sand trap. Tape loose on slide VIEW
4 75 Water flowing through vortex tube sand trap. VIEW
4
7 lantern slides from unlabeled container
4 76 Graph. "Dolores River at Gateway. Fig. 1". VIEW
4 77 Graph. "Dolores River at Gateway. Fig. 2". VIEW
4 78 Graph. "Arkansas River at Salida. Fig. 3". VIEW
4 79 Graph. "Arkansas River at Salida. Fig. 3". Copy 2 VIEW
4 80 Graph. "Arkansas River at Salida. Fig. 4". VIEW
4 81 Graph. "San Juan at Pagosa Springs. Fig. 2". VIEW
4 82 Graph. "San Juan at Pagosa Springs. Fig. 1". VIEW
4
6 lantern slides: original container labeled "R.L. Parshall, 8 lantern slides"
4 83 Grass area with what appears to be posts, numbered sections. VIEW
4 84 Unknown wheeled cart. VIEW
4 85 "Plan of apparatus evapo-transpiration study". VIEW
4 86 "Mariotte feed to supply evapo-transpiration loss from tanks. Jan. 1932". VIEW
4 87 Graph. "Trend of evapo-transpiration losses from various crops by weeks. 1932". VIEW
4 88 Graph. "Trends of evapo-transpiration losses from various crops by weeks. 1931". VIEW
5 1 Graphs and tables. 14 slides on 1 sheet
First 6 slides: original container labeled "MP". Last 8 slides: original container labeled "RLP"
5 1 Graph: "Arkansas River at Salida".
5 1 Graph: "Colorado River at Glenwood Springs".
5 1 Graph: "North Platte River at Saratoga".
5 1 Graph: "Arkansas River at Durango".
5 1 Graph: "Clear Creek at Golden".
5 1 Graph: "St. Vrain River at Lyons".
5 1 4 slides: presumed to be Poudre River/Cameron Pass.
5 1 Table: "Percent snow cover and water content of snow at Cameron Pass".
5 1 Graph: "Cache La Poudre River at Fort Collins photographic method of forecasting".
5 1 Graph: "Saint Vrain River".
5 1 Graph: "Poudre River".
5 2 Flumes and weirs. 12 glass slides on 1 sheet
Original container with note: "Slides Cipolletti (i.e., Cippoletti) weirs and error corrections for those and for Parshall flumes"
5 2 Graph: "Fig.1. Error in discharge ... Cippoletti".
5 2 "Table 4. Error in discharge...".
5 2 Graph: "Fig.2. Error in discharge ... Cippoletti".
5 2 Graph: "Discharge error ... Parshall".
5 2 Table 4. Discharge error ...".
5 2 Graph: "Discharge error ...".
5 2 Table: "Discharge error for incorrect ... Parshall".
5 2 Table: "Discharge error for rectangular or Cippoletti...".
5 2 Graph: "Discharge error ...".
5 2 Flume/weir.
5 2 Flume/weir.
5 2 Flume/weir.
5 3 "Walt Thomas slides, Neyrpic gates and measuring diversion/flow control structures in developing countries". 20 glass slides, 2 slides, 37 contact prints on 3 sheets
5 3 6 glass slides photographs of flumes/weirs.
5 3 13 glass slides line drawings.
5 3 1 glass slide graph.
5 3 1 slide black and white photograph.
5 3 1 slide color photograph.
5 3 37 contact prints, many are copies of the slides.
Subseries 3.2: Other materials. 1937-1940s and 1978.
This subseries consists of a 16mm film on snow measuring and a cassette tape by Maxwell Parshall. The latter provides a history of the Parshall family and information on Ralph and Maxwell Parshall particularly as related to the college.
7 Measuring snow. 1937-early 1940s. 1 16 mm film, approx. 30 min. VIEW
Photocopy of photograph showing two men measuring snow from "Federal-State Cooperative Snow Surveys and Irrigation Water Forecasts for Colorado River Drainage Basin, April 1, 1941, by Division of Irrigation, Soil Conservation Service, U.S. Dept. of Agriculture and Colorado Agricultural Experiment Station" housed with the film. Similar to the film, and possibly Ralph Parshall.
5 4 History-CSU, M. Parshall. 1978 December 5. 1 cassette tape VIEW


Series 4: Artifacts, 1901-1964 and undated (5.25 linear feet)

This series contains objects once belonging to Ralph Parshall. Included are pins, plaques, pictures, and more. The Parshall drawings at the end were likely all done while he was a college student. The Stuver drawings were presumably done around the same time by his future wife, Florence May Stuver. The various sets of drawings appear to be homework problems or class exercises. There is also a current meter assoicated with Max Parshall. The series is arranged by material type.
Box Folder
5 5 Autograph book on occasion of retirement. 1948.
5 6 Framed picture: Galileo Galilei. 1928?.
5 7 Framed picture: Da Vinci. 1928.
14 4 Framed photo: Rio Grande canal. 1953.
5 8 Fraternity pins. 5 pins
5 9 Mason penny "Cache La Poudre Chapter 1970. no. 11. R.A.M. Oct. 15, 1935". 1935.
5 10 Pin: 50 year club, Colorado A and M.
6 1 Plaque: Four States Irrigation Council, Headgate Award. 1958.
6 2 Plaque: Honor Trophy, Alumni Association, Colorado A and M. 1942.
6 3 Registered professional engineer seal no. 1161.
6 4 Slide rule.
6 5 Slide rule tie clasp.
8 Current meters. c. 1930.
15 Gurley current meter no. 37260. c. 1960-1964.
Note inside wooden box stating meter was rated in 1960 and 1964 by M. Parshall
Drwr 1 Parshall technical drawings.
Drwr 1 1 Lettering and coloring. undated. 12pp. 11 x 18 inches
Drwr 1 2 Joint illustrations. undated. 16pp. 11 x 18 inches
Drwr 1 3 Perspectives. undated. 12pp. 11 x 18 inches
Drwr 1 4 Figures. undated. 11pp. 11 x 18 inches
Drwr 1 5 Maps, lettering, and contours. 1903-1904, undated. 9pp. 18 x 23 inches
Drwr 1 6 Descriptive geometry problems. undated. 10pp. 18 x 23 inches
Drwr 1 7 Descriptive geometry problems. undated. 15pp. 18 x 23 inches
Drwr 1 Stuver technical drawings.
Drwr 1 8 Architecture. 1901, undated. 14pp. 18 x 23 inches
Drwr 1 9 Descriptive geometry problems. undated. 15pp. 18 x 23 inches
Drwr 1 10 Perspectives. undated. 12pp. 18 x 23 inches