Guide to the Irrigation Research Papers

Prepared by Patricia J. Rettig, Naomi Gerakios Mucci, and Madeline Johannsen; 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 Patricia J. Rettig, 2015.
Title: Irrigation Research Papers
Dates: 1890-1985
Bulk Dates: 1920-1950
Quantity: 29.75 linear feet (47 document boxes, 9 photo boxes, 7 negative boxes)
Identification: WIRP
Abstract: In 1911, the Irrigation Investigations Unit of the U.S. Department of Agriculture was established in Fort Collins in conjunction with Colorado Agricultural College (now Colorado State University). Scientists within the unit, including Ralph Parshall, Carl Rohwer, Victor M. Cone, and William E. Code, conducted irrigation-related research. They studied and designed apparatuses to measure water flow through canals and diversion structures, investigated various irrigation projects, and conducted snow surveys. Materials include letters, data, field books, drafts, reports, blueprints, maps, conference materials, photographs, and negatives.
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:
  • Irrigation engineering.
  • Irrigation water.
  • Parshall flumes.
  • Flumes.
  • Weirs.
  • Snow surveys.
  • Groundwater.
  • Wells.
  • Irrigation pumps.
  • Water current meters.
Persons:
  • Parshall, Ralph L. (Ralph Leroy), 1881-1959.
  • Rohwer, Carl.
  • Cone, Victor M.
  • Code, W. E. (William E.), 1891-
Organizations:
  • United States. Bureau of Irrigation Investigations.
  • United States. Department of Agriculture.
  • United States. Soil Conservation Service. Division of Irrigation.
  • United States. Soil Conservation Service. Division of Irrigation and Water Conservation.
  • Colorado Agricultural College.
  • Colorado Agricultural College. Department of Civil and Irrigation Engineering.
  • Colorado Agricultural Experiment Station.
  • Colorado A & M College.
  • Colorado State University.
Places:
  • Fort Collins (Colo.)
  • Cache la Poudre River (Colo.)
  • South Platte River Watershed (Colo. and Neb.)
  • San Luis Valley (Colo. and N.M.)
  • Arkansas River Watershed.
  • Colorado River Watershed (Colo.-Mexico)
Occupations:
  • Irrigation engineers.
Special Document Types:
  • Photographs.
  • Negatives.
  • Maps.
The Irrigation Research Papers originated with early twentieth century scientists in the United States Department of Agriculture (USDA) Irrigation Investigations Unit. Undergoing several name changes to become today's Water Management Research Unit, the Irrigation Investigations Unit has a legacy of significant researchers and achievements.
In 1911, the Irrigation Investigations Unit was established at Colorado Agricultural College (now Colorado State University) in Fort Collins, with Victor M. Cone as its first director. Cone's work largely focused on measuring water flows and the design of canals and diversion structures.
In 1913, Ralph Parshall was appointed director of irrigation investigations in the USDA's Irrigation Investigations Division. During his time in charge, Parshall oversaw and conducted research on irrigation methods in the western United States. While his most notable work was the invention of the improved Venturi flume, later renamed the Parshall flume, Parshall also designed and built other water measurement instruments and meters, studied groundwater, and conducted snow surveys. Carl Rohwer joined Parshall in 1914. Together they studied evapotranspiration, water flow measurement, well designs, and ditch seepage.
In 1915, the USDA reorganized so all agricultural engineering work would fall under the same supervision. The Irrigation Investigations Division was transferred to the newly formed Office of Public Roads and Rural Engineering, which in 1918 became the Bureau of Public Roads. Within the Bureau of Public Roads, the Division of Agricultural Engineering oversaw the Division of Irrigation.
On July 1, 1931, the USDA again reorganized and the Division of Agricultural Engineering became the Bureau of Agricultural Engineering. The irrigation staff continued to carry out their experiments and research when, on July 1, 1939, they became part of the Soil Conservation Service. Finally, in 1953, the Agricultural Research Service was formed with the Division of Irrigation and Water Conservation joining the Soil and Water Conservation Research Branch and eventually becoming the Water Management Research Unit.
Following Parshall's retirement in 1948, Rohwer led the group until his own retirement in 1956. The work of these and other men furthered the understanding of irrigation methods, equipment, and techniques in the first half of the twentieth century.
The Irrigation Research Papers consists of documents dated from 1890 to 1985, with the bulk falling from 1920 to 1950. The collection documents the development of irrigation equipment, practices, and knowledge in the early twentieth century. It captures the activities of the researchers, working methods, and unpublished knowledge. The geographic focus of the collection is Colorado, especially the Cache la Poudre River Basin, but also includes California, Wyoming, Arizona, Idaho, Texas, North Dakota, and Nebraska. Correspondence exchanged with ditch companies about research and experiments reveals the interests of practicing irrigators. The collection also includes meeting minutes and conference materials from professional organizations such as the American Society of Civil Engineers, the Association of Western State Engineers, and the Western Irrigation and Drainage Research Association. Some of the materials document the beginnings of these and other conferences. The collection also documents groundwater research and the early days of snow surveying and runoff forecasting for western states. The photographic portion extensively depicts irrigation-related equipment and practices, both in the field and in the laboratory, but most of the images are not labeled or dated. The collection includes correspondence, scientific data, research notes, drafts, finished articles and reports, speeches, receipts, invoices, blueprints, drawings, maps, photographs, and negatives.
Most of the original envelopes of both papers and photographic materials were numbered by the collection creators. This original order was largely retained.
The collection consists of 2 series in 63 boxes:
Preferred Citation

Irrigation Research Papers, Water Resources Archive, Colorado State University.

Custodial History

In November 1987, the archivist at the Colorado State University Libraries arranged for the Irrigation Research Papers to be stored at the Colorado State Archives in Denver. In September 2014, the State Archives returned 22 records cartons of materials to the Water Resources Archive.

Acquisition

The Irrigation Research Papers was donated in 1975 to the Colorado State University Libraries by Gordon Kruse, a former employee of the USDA Agricultural Research Service. A small addition from Mr. Kruse was donated via Tom Trout, retired director of the USDA Agricultural Research Service's Water Management Research Unit, in June 2017.

Processing

Processing was completed in October 2015. Materials were rehoused in acid-free folders, envelopes, or polyester sleeves and reboxed. For Series 1, photocopies of numbered and labelled envelopes were made and placed at the front of every folder. Rubber bands, paper clips, and rusty staples were removed and replaced with plastic clips as needed. Newspaper clippings, telegrams, and other acidic papers were inserted between sheets of acid-free paper. Loose photographs and negatives were inserted in archival sleeves or envelopes. Duplicates beyond two or three copies were removed, as were a few items due to deterioration issues. Photographic materials in Series 2 were separated and rehoused by material type. Duplicate images beyond two copies (either prints or print/negative) were removed, as were most images of graphs, charts, and maps. Nitrate negatives were scanned, with some exceptions such as the sets of snow photos, and discarded. Broken unidentified glass plate negatives and highly deteriorated film negatives were also discarded. Each image retains the numbering system found on the original envelopes. A separate item-level inventory for Series 2 can be provided on request. Processing of the 2017 addition was completed in July 2017 and can be found in box 47.

Related Collections

The Water Resources Archive holds the Ralph L. Parshall Collection, the Papers of Louis G. Carpenter, and the Groundwater Data Collection, all of which document Parshall and/or his colleagues. The Agricultural and Natural Resources Archive holds the Records of the Colorado Agricultural Experiment Station.

Online Materials

Some of the documents and photographic materials in this collection have been digitized and are available through the Colorado State University Libraries website. In the electronic version of this document, direct links appear in context.

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.

Series 1: Papers, 1890-1985 and undated (23.25 linear feet)

This series consists of original research, data, drafts, correspondence, and reports by USDA irrigation engineers and their collaborators. Folded maps, drawings, and blueprints can be found throughout the series, along with sets of photographs. Included is research by Ralph Parshall, Carl Rohwer, Victor M. Cone, William Code, and others, who worked on irrigation methods, equipment, and techniques, primarily in Colorado and especially the Cache la Poudre Basin. The team also collected data and information on water projects in Wyoming, Idaho, California, North Dakota, Nebraska, Texas, and other states. Additional subjects are groundwater research and snow surveys. The series contains conference materials as well. Files are arranged in their original numerical order as shown in the title numbering, with items from a secondary inventory of related files following. At the end of the series is a small set of files related mainly to the dedication ceremony honoring the Parshall flume as a historical landmark in agricultural engineering and the associated documents collected at the time. Some of these include copies of letters by Parshall as well as documentation about the flume. Also here are a few files related to groundwater wells.
Box Folder
1 1 1. 15-Foot Improved Venturi Flume, Holbrook Canal, Rocky Ford, Colorado. 1927. 4pp. VIEW
1 2 2. Memorandum, 20-foot Venturi, Bijou Canal -- Feb. 1931. 1931. 7pp. VIEW
1 3 3. Sand Trap, Colorado Canal. 1930. e20pp. VIEW
1 4 4. Mms [Manuscripts] for revision of Bulletin 813, Parshall Measuring Flume, Sent to Berkeley -- October 1, 1930. 1930. e30pp. VIEW
Includes drafts of article "Parshall Measuring Flume" for Farmers' Bulletin 813.
1 5 5. Amity Canal Sand Trap. 1931, undated. 10pp. VIEW
1 6 6. Catlin 12-Foot Venturi Flume. 1930-1931, undated. e20pp. VIEW
1 7 7. Excelsior and Booth Orchard. 1926-1930. 6pp. VIEW
1 8 8. Rocky Ford Highline. undated. 5pp. VIEW
1 9 9. New Type Flume -- Hydrology Lab, Oct. 1922. 1922-1923, 1928, 1939, undated. e45pp. Includes photograph. VIEW
1 10 10. Box Elder Reservoir Co., 12 -- Improved Venturi Flume, June 1926. 1926, undated. 20pp. VIEW
1 11 11. Venturi Flume, Discussion by Rodolfo Ballester, Professor of Hydrology at University La Plata, Buenos Aires, Argentina, South America. 1924-1926, 1929, undated. e75pp. VIEW
1 12 12. The Lake Canal Co., Installation of Venturi Flume. 1927, undated. e40pp. VIEW
1 13 13. Las Animas Consolidated Ditch, Arkansas Valley. 1925-1926, undated. 25pp. VIEW
1 14 14. 10-foot Improved Venturi Flume, Dye Lake Outlet, Holbrook Irrigation District, 1926. 1925-1926, undated. 6pp. VIEW
1 15 15. 9-inch Parshall Flume -- W.E. Code, Civil Building Campus. 1929-1930, 1935-1939, 1942, undated. e75pp. VIEW
1 16 16. Specifications Metal Improved Venturi Flumes -- April 1929, 3-6-9 and 12-inch. 1925, 1929, undated. 25pp. VIEW
1 17 17. Data for Indicating Charts. undated. e30pp. VIEW
1 18 18. Nine Mile Ditch -- Higbee, Purgatory River. 1928-1929, undated. 20pp. VIEW
2 1 19. Memo -- Highland Ditch, Purgatory River near La Junta, Colo. 1928. 10pp. VIEW
2 2 20. Fort Morgan Canal 20-foot Improved Venturi Flume -- March 1930. 1930, undated. 3pp. VIEW
2 3 21. Calibration of Taylor 3-inch Flume. 1931. 15pp. VIEW
2 4 22. Moffat Water Tunnel, 15-foot Improved Venturi Flume, East Portal -- August 1930. 1930-1931, undated. 15pp. VIEW
2 5 23. Obsolete Drawing of Venturi Flumes. 1926-1927, undated. 4pp.
2 6 24. Oxford Farmer's Canal, Arkansas Valley. 1930. 4pp. VIEW
2 7 25. Alta Irrigation District, 15-foot Concrete Flume. undated. 4pp. VIEW
2 8 26. Whitney Ditch near Windsor. 1930, undated. 2pp. VIEW
2 9 27. Fort Bent Canal near Lamar, Colo. 1907, 1929, undated. 10pp. VIEW
Includes a large map of Otero County.
2 10 28. Special Tests of Variations of Parshall Flume Bellvue Laboratory, summer and fall 1932. 1932, 1935, undated. e40pp. VIEW
2 11 29. Vortex Tube Sand Trap Gage by Wasteway, Fort Lyon Canal -- August 1933. 1933, undated. 15pp. VIEW
2 12 30. Measuring Structures, Riverside and Empire Reservoir Inlets -- Jan. 1933. 1932-1933, undated. 10pp. Includes photograph. VIEW
2 13 31. Trout Creek Project, Forest Service, August 1933. 1933, undated. e25pp. VIEW
2 14 32. Baca Ditch Trap, Feb. 1934 -- Buffalo Canal Vortex Tube Sand Trap, May 1933. 1933-1934, undated. 20pp. VIEW
2 15 33. Lytle Creek Project, 15-foot Parshall Measuring Flume -- April 1932. 1932, undated. e50pp. VIEW
2 16 34. 3-inch Improved Venturi Flume -- June 1930. 1913, 1930, 1941, undated. e30pp. VIEW
Includes Farmer's Bulletin No. 168.
2 17 35. 15-ft Weir Calibration, Bellvue -- 1932, 1926. 1926, 1932, undated. e45pp. VIEW
2 18 36. Upper Platte and Beaver Canal, 12-Foot Flume -- March 1933. 1933, undated. 10pp. VIEW
2 19 37. Colorado Springs Sewer System, 6-Inch Flume, February 1933. 1933. 5pp. VIEW
2 20 38. Modified Parshall Measuring Flume for 12-inch Pipe -- March 1932. 1932, 1935, undated. e30pp. VIEW
Includes "Memorandum Concerning Tests Made on a Modified Form of Parshall Measuring Flume Adapted to Flow in Pipe Lines."
2 21 39. Special Tests on 90 Degree Notch Weir - heads .05 to .12 foot, Hydraulic Laboratory -- Dec. 32. 1932, undated. 15pp. VIEW
2 22 40. Lower Platte and Beaver Canal -- October 1932. 1932, undated. e40pp.
Includes Colorado Agricultural College Bulletin 386.
2 23 41. Jackson Lake Outlet, Fort Morgan Canal, 20-foot Flume. 1932, undated. 10pp.
Includes "Parshall Flumes of Large Size" and photograph.
2 24 42. Cost of Sand Sluicing in Clear Creek Valley -- 1931, Memo prepared for Mr. McCroy - Chief, Dec. 1931. 1931, 1934, undated. e50pp. VIEW
Includes drafts of "Memorandum Concerning the Cost of Sluicing Sand from Canals Diverting from Clear Creek."
3 1 43. Koolau Ditch, Haipuaena Gulch, Island of Maui, Hawaiian Islands -- October 1932. 1932, undated. e50pp.
Includes "Memorandum Concerning Proposed Installation of a Parshall Flume on the Koolau Ditch, Island of Maui, T.H."
3 2 44. Irrigation System for Fort Lewis School, April 1931, R.L. Parshall. 1931, undated. e50pp.
Includes "Report Concerning the Proposed Irrigation System for the Fort Lewis School Near Hesperus, Colorado."
3 3 45. J.K. Mullen Home for Boys. 1932-1933, undated. e30pp. VIEW
3 4-5 48. Reports, Evaporation -- Soil Moisture, R.L. Parshall. 1925-1928, undated. e300pp.
Includes "Progress Report on the Evaporation From Moist Soils"; "Evaporation From Moist Soils" by Ralph Parshall; "Report on Soil Analysis"; "Experiments to Determine Rate of Evaporation From Saturated Soils and Riverbed Sands"; and "Memorandum Concerning Loss of Evaporation from a Free Water Surface..." as well as a photograph.
3 6 49. Energy Content through Large Flumes. 1926-1928, 1931, undated. e40pp.
3 7 50. Pasadena and Los Angeles, Recording Instruments, October 1931. 1931-1932, undated. e40pp.
3 8 51. Piezometer Studies. undated. 3pp.
Includes a drawing and excerpt from a publication.
3 9 52. Loss of Head Through Large Venturi Flumes, January and February - 1931, Parshall. 1931, undated. e30pp.
4 1 53. Large Parshall Measuring Flumes. 1928, 1931, undated. e150pp.
Includes drafts of "Large Parshall Measuring Flumes"; list of captions for photographs; drafts of "The Venturi Flume" for Colorado Experiment Station Bulletin 263, and Colorado Experimental Station Bulletin 336, March 1928.
4 2 54. Large Improved Venturi Flumes. 1928, undated. 15pp.
4 3 55. Venturi Flumes, Letters from Owens-Cressy and Snyder. 1929, 1931. 20pp. VIEW
Includes letters between Ralph Parshall and Ralph Owens.
4 4 56. Large Improved Venturi Flumes. 1928-1929, undated. e50pp.
4 5 57. Measurement of Irrigation Water in Open Channels, R.L. Parshall, December 1930. 1930-1931, undated. e100pp.
Includes multiple drafts and corrections for article "Measurement of Irrigation Water in Open Channels" by Parshall and Cone, as well as several photographs.
4 6 58. Data Concerning the Proposed Installation of 20-Foot Parshall Measuring Flume, Maverick County Water Dist. 174 Eagle Pass, Texas -- W.L. Rockwell, Eng., Dec. 1931. 1931, undated. 10pp.
4 7 59. Memorandum -- New Improved Venturi Flume for Fort Lyon Canal. 1927-1929, undated. e100pp.
4 8 59. Memorandum -- New Improved Venturi Flume for Fort Lyon Canal: Fort Lyon Canal. 1929, 1932. 11pp.
4 9 59. Memorandum -- New Improved Venturi Flume for Fort Lyon Canal: 40-Foot Improved Venturi Flume, Fort Lyon Canal, Las Animas, Colorado, April 1927. 1927. 20pp.
4 10 60. Bellvue Laboratory. 1923, 1925, undated. 20pp. VIEW
Includes "Proposed Improvements at Bellvue Laboratory."
5 1 61. 20 Foot Concrete Venturi Flume, Bijou Canal, March 1931. 1931. 1p.
5 2 62. Memorandum, Large Parshall Measuring Flumes, 1931. 1930. 2pp.
5 3 63. Holbrook 20-Foot Venturi. 1927-1928, undated. e50pp.
5 4 64. Copper Lining Upper Reservoir, August-Sept. Hyd. Lab., 1926. 1926. 5pp.
5 5 65. Memo -- Hydraulic Laboratories, Colorado Experiment Station, May 1933. 1913, 1933. 15pp. VIEW
Includes "Memorandum Concerning the Hydraulic Laboratories of the Colorado Agricultural Experiment Station, Fort Collins," "Hydraulic Laboratory for Irrigation Investigations, Fort Collins, Colo.," and drawings of the laboratory's current meter rating station.
5 6 66. First Conference of Irrigation and Drainage Engineers -- Experiment Stations of the West -- Berkeley, Sept. 1925. 1925. e60pp. VIEW
5 7 67. Second Conference of Irrigation and Drainage Engineers -- Experiment Stations of the West -- Berkeley -- Dec. 1927. 1927-1928, undated. e60pp. VIEW
Includes "California Cooperative Irrigation Investigations in the Sacramento-San Joaquin Delta" and "Report on the Second Conference of Irrigation and Drainage Investigators."
5 8 67. Second Conference of Irrigation and Drainage Engineers -- Experiment Stations of the West -- Berkeley -- Dec. 1927: Irrigation Conference at Berkeley, December 28-30, 1927. 1927-1928. 10pp. VIEW
5 9 68. Third Conference of Irrigation and Drainage Engineers -- Experiment Stations of the West -- Logan, Utah, June 1929. 1929-1931. e45pp. VIEW
Includes "Irrigation Water Supply and its Physical Control" by Ralph L. Parshall, paper presented at the Fourth Biennial Meeting of the Western Irrigation and Drainage Research Association, July 16-18, 1931.
5 10 69. Fourth Conference of the Western Irrigation and Drainage Research Assn, Tucson, Arizona, 1931. 1930-1933. e75pp.
Includes "Report of the Fourth Biennial Conference of the Western Irrigation and Drainage Research Association."
5 11 70. Nebraska State Irrigation Association, Scottsbluff, Dec 12/32. 1932. e150pp.
Contains program, 2 copies of proceedings from Fourth Annual Convention, a newspaper clipping, and "Water Measuring Devices" by Ralph L. Parshall.
5 12 71. Riverside Weir, Scobey Data, April 1928. 1928. e20pp.
5 13 72. Los Angeles -- 1-Foot Parshall Measuring Flume, March 1932, Colorado Experiment Station, Fort Collins, Colorado. 1921, 1932, undated. e45pp.
Includes "The Venturi Flume," Bulletin 265 of the Agricultural Experiment Station.
5 14 73. American Geophysical Union, Section of Hydrology, March 1932. 1931-1934. e45pp.
Includes the National Research Council American Geophysical Union's "Report of Committee on Bibliography," statutes, and bylaws.
5 15 74. Organization, Professional Employees, U.S. Department of Agriculture, Feb. 1932. 1931-1932. 10pp.
Includes "Report of the Executive Committee of the Organization of Professional Employees of the Department of Agriculture."
5 16 75. Application of the Radio Tube in Measuring Velocity of Water in Pipes -- Parshall. 1930. 10pp.
5 17 76. Transition Losses. 1929. 1p.
Contains the report "Compilation of Transition Data for Curved and Straight Outlet Sections, Bellvue Laboratory, November 1929."
5 18 77. Weir Experiments. 1930, undated. 5pp.
5 19 78. National Hydraulic Lab, Washington, D.C. 1930. e50pp.
Includes "Design of National Hydraulic Laboratory" and "Notes of Second Meeting of the Advisory Committee on the Design of the National Hydraulic Laboratory."
5 20 79. Terry Lake Data on Res. Gage. 1930. 2pp.
5 21 80. Duane C. Kelso. 1930. 20pp.
Includes letters and information pertaining to a worker's compensation claim.
5 22 81. K.O.A. Pumping for Irrigation, Feb. 5, 1930. 1930. e20pp.
Includes drafts and copies of "Pumping for Irrigation" by R.L. Parshall.
5 23 82. Idea Concerning Apparatus for Draw Down. undated. 3pp.
5 24 83. Riverton District Correspondence. 1917-1918, undated. e45pp.
5 25 84. The 40-Foot Improved Venturi Flume, Article for Engineering News-Record, Jan. 1930. 1930, undated. e30pp.
Includes draft of "Large Improved Venturi Flumes," draft notes, meeting minutes for the Special Committee on Irrigation Hydraulics, and 2 photographs.
6 1 85. Drainage and Irrigation Projects -- 1918. 1917-1918, undated. e75pp. VIEW
6 2 86. San Luis Valley Data - in part, of trip - Fall 1913, Parshall. 1909, 1912, undated. e90pp. VIEW
Includes pamphlets "Irrigated Farms Open to Settlement in the United States Government, Shoshone Irrigation Project, Big Horn Basin, Wyoming"; "Rules and Regulations Governing the Distribution of Water in the Modesto Irrigation District"; "Rules and Regulations of the Sacramento Valley West Side Canal Company"; and "Belle Fourche Irrigation Project, South Dakota." Also includes a series of San Luis Valley ditch descriptions.
6 3 88. Sand and Silt Sampler, Bellvue Laboratory, 1929. 1929. 17pp. VIEW
Includes "Report on the Automatic Silt Sampler."
6 4 89. Automatic Silt Sampler, Rohwer and Parshall, Sept. 1929. 1929, undated. e45pp. Includes 4 photographs.
6 5 90. Personal [sic Personnel] Classification Board Form 14, Field Questionnaire, Parshall, Sept. 1928. 1928. e20pp.
6 6 91. Economic Agricultural Conferences: Alamosa, Monte Vista, Rocky Ford, Steamboat Springs, Grand Junction. 1928-1930, undated. e50pp. VIEW
Includes reports "Western Slope Agricultural Recommendations"; "Arkansas Valley Agricultural Recommendations"; and "San Luis Valley Agricultural Recommendations."
6 7 91. Economic Agricultural Conferences: Alamosa, Monte Vista, Rocky Ford, Steamboat Springs, Grand Junction -- Agricultural Conference, Grand Junction, Dec. 7 and 8, 1928. 1927-1929, undated. e75pp. VIEW
Includes "Successful Farms on the Western Slope of Colorado" by R.T. Burdick and T.H. Summers. Includes Historic Water Tables chart.
6 8 91. Economic Agricultural Conferences: Alamosa, Monte Vista, Rocky Ford, Steamboat Springs, Grand Junction -- Agricultural Conference, Rocky Ford, Colo., Feb. 17-18, 1928. 1925, 1928, undated. e65pp. VIEW
Includes 2 copies of "An Agricultural Program for the Arkansas Valley of Colorado."
6 9 91. Economic Agricultural Conferences: Alamosa, Monte Vista, Rocky Ford, Steamboat Springs, Grand Junction -- Agricultural Conference, Alamosa, Feb. 24-25, 1927. 1918, 1927-1928, undated. e75pp. VIEW
Includes "Senate Journal," January 18, 1927.
6 10 91. Economic Agricultural Conferences: Alamosa, Monte Vista, Rocky Ford, Steamboat Springs, Grand Junction -- Steamboat Conference, October 1927. 1927, 1931. e45pp. VIEW
6 11 92. Campus Pipe Line, June 1932. 1928, 1931-1932, undated. e75pp.
Includes drafts and completed copies of "Proposals for the improvement of the present irrigation system on the Colorado Agricultural College Campus, Fort Collins."
6 12 92. Campus Pipe Line, June 1932 -- Irrigation of the Campus Lawns. 1929. 2pp.
6 13 92. Campus Pipe Line, June 1932 -- Goudy C and S Ry. 1932. 3pp.
6 14 92. Campus Pipe Line, June 1932 -- Improvements for the campus irrigation system and estimates on cost of sprinkler systems, Feb. 1932. undated. e30pp.
7 1 93. Control Weir Data, Progress Report, Dec. 1926. 1925-1927, undated. e175pp. VIEW
Includes "Construction and Use of Farm Weirs"; "Progress Report on the Control Weir or Critical Depth Flow Meter"; and 3 photographs.
7 2 93. Control Weir Data, Progress Report, Dec. 1926 -- The Hydraulic Double Jump Flume, October 1925, work done by Rohwer and Parshall at Hydraulic Laboratory. 1925-1926, undated. e15pp. VIEW
7 3 94. Notes on Measuring Irrigation Deliveries, 1925. undated. e50pp. VIEW
7 4-6 96. R.L. Parshall. 1923-1950, undated. e400pp. VIEW Folder 1 Folder 2 Folder 3
Contains writings by Parshall, as well as letters and memoranda.
7 7 96. Papers by R.L. Parshall [Folder 1 of 3]. 1918-1950, undated. e150pp. VIEW
Includes "Special Lectures and Student Papers, CE-160"; "Fifty-Third Annual Report of the Colorado Experiment Stations"; and memoir for James Sykes.
8 1-2 96. Papers by R.L. Parshall [Folders 2-3 of 3]. 1918-1950, undated. e300pp. VIEW Folder 2 Folder 3
8 3 98. South Platte Conservation League, 1928. 1923-1924, 1928-1929, undated. e200pp. VIEW
8 4 99. Floor Area of the Civil and Irrigation Engineering Building, College Campus, April 1926. undated. 10pp. VIEW
8 5 100. Irrigation Pumping in Colorado, May 1928. 1924-1929, undated. e100pp. VIEW
Includes letters related to the hiring of William E. Code.
8 6 101. Simplex Valve and Meter Co., Brisbane and Peacock Instruments, May 1932. 1932. 4pp. VIEW
8 7 102. Proposed Enlargement, Halligan Dam, North Poudre Irrigation Co. 1923. e35pp. VIEW
8 8 103. Irrigation in Colorado, May 1928. 1928, undated. e50pp. VIEW
8 9 104. Water Stage Recording Instruments. 1921-1922, undated. e200pp. VIEW
9 1 105. Report of Tests on Great Western Irrigation Meter, Dec. 1923. 1923-1924, undated. e100pp. VIEW
Includes 2 folded posters for Great Western Irrigation Co.
9 2 105. Report of Tests on Great Western Irrigation Meter, Dec. 1923 -- 1924 Curves. 1923-1924, undated. 6pp. VIEW
9 3 106. Discharge Data, Circular Weirs. 1913. 3pp. VIEW
9 4 107. Irrigation in Colorado, Parshall, International Congress of Soil Science, Rocky Ford, Colo., June 30, 1927. 1926-1927, undated. e130pp. VIEW
9 5 108. Design and Report, Evaporation Reservoir, Rohwer and Parshall, Dec. 1925. 1925-1926, undated. 12pp. VIEW
9 6 109. Longitudinal Draw-Down Weirs. undated. 2pp. VIEW
9 7 110. Transcription of Flow Data -- Circular and Notch Weirs -- For Purdue Engineering Experiment Station, Lafayette, Ind., Jan. 15, 1927. 1927, undated. 17pp. VIEW
9 8 111. Calibration of Small Pitot Tubes for D.L. Yarnell, University of Iowa, Work done at Hydraulic Lab, Fort Collins, Colo., May 1926. 1926, undated. e45pp.
9 9 112. Data on Preliminary Tests, Automatic Divisor, Fort Collins Laboratory, Summer 1925, Taylor and Stockwell. 1925, undated. e50pp.
9 10 113. List of Lantern Slides, Improved Venturi Flume. undated. 3pp.
9 11 114. Investigations of Model Dams. 1925-1926, undated. e30pp. VIEW
9 12 115. Memorandum on Flume or Pipe Construction, College Farm Ditch at Avon, Colo., March 1926. 1925-1926, undated. e25pp. VIEW
9 13 116. Headgate Improvement at Bellvue Hydraulic Laboratory. 1926, undated. 2pp. Includes photograph. VIEW
9 14 117. Proposed Projects, Agricultural Engineering. 1926. 5pp. VIEW
9 15 118. Soils of the Arkansas Valley in Colorado by A.T. Sweet. undated. e45pp. VIEW
Includes document on San Luis Valley.
9 16 119. 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. 1926-1927. e65pp. VIEW
Includes "Report on the Agricultural Experiment Stations, 1927."
9 17 120. Farmer's Ditch Company, Boulder, Colo., Drawings -- Headgate and Siphons. 1923, 1925, undated. 3pp.
9 18 121. Orchard Irrigation. 1925, undated. e25pp. VIEW
Includes report on orchard irrigation in Colorado.
10 1 122. Entrance to Pipes -- Scobey. 1925, undated. 4pp. VIEW
10 2 123. Bring up Department Irrigation Bulletins to date and bind for our library. 1920-1923. e35pp. VIEW
Includes lists of irrigation and geodetic publications.
10 3 124. Evaporation Data, Arkansas Valley -- Soil Evaporation, Memo -- Free Water, Fort Collins. 1923-1927, undated. e100pp. VIEW
10 4 124. Evaporation Data, Arkansas Valley -- Soil Evaporation, Memo -- Free Water, Fort Collins; Mr. A. W. Skuderna, American Beet Sugar Company, Rocky Ford, Colorado. 1923-1924, undated. e30pp. Includes photographs. VIEW
10 5 125. Discharge Table, 10-Foot Standard Rectangular Weir at Bellvue Laboratory. 1923. 7pp. VIEW
10 6 126. Science and Research in Agriculture, papers presented before Agricultural Club, Rocky Ford, Colo., Oct. 25, 1923. 1923-1924. e30pp. VIEW
Includes "Science and Research in Agriculture" by Parshall.
10 7 127. Review -- Poudre Valley Report. undated. 11pp. VIEW
10 8 128. Earthen Dams, Fellows and Fortier Memo. 1922-1923, undated. e35pp. VIEW
10 9 129. Use of Old Venturi Flume in the Measurement of Sewage. 1921, 1924. e40pp. VIEW
10 10 130. Soldier Canon Dam, College Lake, Colo. Agricultural College, 1923. 1923. 1 blueprint VIEW
10 11 131. Electrical thermometer. 1916, 1924, undated. e65pp.
10 12 132. Bijou Record, Parshall Register, South Platte Seepage Investigation, 1920. 1930. 1p.
10 13 133. Water Resources of Colorado, Preliminary. undated. 3pp. VIEW
10 14 134. Cheyenne Wells, Colo., Pumping possibilities in this locality, Aug. 1928. 1928. 3pp. VIEW
10 15 135. Hydraulic Laboratory, Davis, California. undated. 5pp. VIEW
10 16 136. Calibration of 10-Foot Standard Weir at Bellvue Laboratory, Nov. 1923. 1921, 1923, undated. e25pp.
10 17 137. Reservoirs, Division 1, Colorado. undated. 12pp. VIEW
10 18 138. Electrical Soil Oven, Built April 1924. 1924. 6pp.
Includes drawings and receipts.
10 19 139. Aquatite waterproofing, Hydraulic Laboratory. 1923-1924, undated. 12pp. VIEW
10 20 140. Results of Orifice Experiments at Fort Collins Hydraulic Laboratory by H.A. Wadsworth, June 1923. 1923. 9pp. VIEW
10 21 141. Orifice Experiment Share Demonstration, Poore Farm Near Boulder, June 13, 1925 -- See negative. undated. 4pp. VIEW
10 22 142. Spillways for Dam, U.S. Reclamation Service. 1919-1923. e40pp.
Includes "The Economic Design of Side Channel Spillways" by Julian Hinds.
10 23 143. American Council on Education, Dec. 1932. 1929, 1931-1932. e40pp. VIEW
10 24 144. Proposed Improvements, Bellvue Laboratory, 1925. 1922-1925. e40pp. VIEW
10 25 145. Pumping Data, Well Contracts, Power Schedule, Machinery Costs, Suggestions for Revision #1404, 1933. 1926, 1932-1933. e45pp. VIEW
11 1 146. Pumping from Wells for Irrigation, Revised Reports, 1933. 1933. e50pp.
11 2 147. Article for Yearbook on Pumping, 1932 -- Rohwer. 1932. 4pp.
11 3 148. Pumping from Wells for Irrigation, Yearbook Article, Rohwer, 1933. 1933. 4pp. 2 copies. Includes 1 photograph, 2 copies.
11 4 149. Yellow Copy, Pumping Bulletin Revision, Carl Rohwer 1933. 1933. e40pp.
11 5 150. Pencil Copy, Revision Bulletin #1404, Pumping, April 1933. 1933. e75pp.
11 6 151. Pencil Copy, Yellow Copy, ASME Paper on Factors Affecting Accuracy of Current Meter Measurements, Carl Rohwer, Oct. 1933. 1933. e75pp.
11 7 152. ASME Paper, Factors Affecting Accuracy of Current Meters, Carl Rohwer, Oct. 1933. 1933. e45pp.
11 8 152. ASME Paper, Factors Affecting Accuracy of Current Meters, Carl Rohwer, Oct. 1933; Figures 1 to 12, Tables 1 and 2. 1933. 18pp.
11 8 153. Current Meter Report without Tables, 1931. 1931. e150pp.
Includes annotated "Current Meters" by Carl Rohwer, which includes photographs.
11 9 154. Current Meter Bulletin Tables. 1920-1921. 16pp.
11 10 155. Estimates on Printing Legends, Current Meters Report, 1932. 1932, undated. e25pp.
11 11 156. Yellow Copy of Report and Pencil Copy of Tables, The Rating and Use of Current Meters, C. Rohwer, Dec. 1932. 1932, undated. e75pp.
11 12 157. Pencil Copy, Current Meter Report , Nov. 5, 1931. 1931-1938, undated. e200pp.
12 1 158. Current Meter Diagram Tracings, 1932, and Legends (Printed). 1932-1933. e80pp.
12 2 159. Current Meter Diagram Blueprints, 1932. 1932. e75pp.
12 3 160. Yellow Copy, Current Meter Report, Nov. 5, 1931. 1931. e115pp.
Draft of "Current Meters" by Carl Rohwer with handwritten corrections.
12 4 161. Current Meter Calibrations, J. Kuntschen. undated. 19pp. 2 copies
12 5 162. Comment on Current Meter Report and Miscellaneous Data. 1932. e35pp.
12 6 163. Current Meters. 1920, undated. e35pp.
12 7 164. Pictures of Gurley Meters. undated. 2 photographs
12 8 165. Current Meter Data From Various Sources. 1923-1933, undated. e175pp. Includes photographs.
Much of the material is in German.
12 9 166. U.S.G.S. Report on Meter Ratings, 1928-1929. 1929-1930. 21pp.
Includes "Meter Ratings with Various Suspension Arrangements, 1928-1929 Ratings."
12 10 167. Current Meter Data from Dr. A. Ott, Meter 4184. 1914, 1928-1931, undated. e150pp. Includes photographs.
Much of the material is in German.
12 11 168. Current Meters, East Bay California Report. 1929, 1932, undated. 9pp. Includes photographs.
12 12 169. Ott Current Meter. 1921, 1930, undated. e60pp.
Much of the material is in German.
12 13 170. Translation -- Investigation of Evolution of the Current Meter. 1903, undated. e45pp. Includes photographs.
12 14 171. Ott Current Meter No. 4184, Kendrick Bellamy Company, Denver, Colo., April 1928, Ratings 969-70-71 and 72. 1928, undated. e35pp.
12 15 172. Bibliography, Current Meters. undated. e20pp.
12 16 173. Current Meters, Hydrometric Experiments, Sandstrom, Stockholm. 1911-1912, undated. e60pp.
13 1 174. Report of Tests Made on Ott Current Meters, Bellvue Hydraulic Laboratory, April 29, 1922. 1921-1922. e25pp. Includes photographs.
13 2 175. Water Gauging for Low Head Units of High Capacity, J.M. Mausson, 1933. 1933. 18pp.
13 3 176. Current Meter Data from E.J. Hoff on comparison between meter measurements and other methods. 1925-1934, undated. 20pp.
13 4 177. Original Data Comparison of Evaporation from Different Types of Pans, 1931. 1910, 1916-1931, undated. e125pp.
13 5 179. Comparison of Evaporation from Different Types of Pans, 1931. 1931, 1933, undated. e45pp. Includes photographs.
13 6 180. Comparison of Evaporation from Pans, Steven's Comments. 1932, undated. e50pp.
13 7 181. Evaporation Data for A.S.C.E. Article. 1898, 1916-1932. e125pp.
Includes "Conference on Research Problems in Consumptive Use of Water and Conservation of Rainfall" and other publications.
13 8 181. Evaporation Data for A.S.C.E. Article -- Bureau of Plant Industry Evaporation Pans. 1929. 5pp.
13 9 181. Evaporation Data for A.S.C.E. Article -- 3 Cup Robinson Anemometer. 1924-1928. 5pp.
13 10 182. Am. Soc. C.E. Evaporation Reports, 1931. 1931-1933. e100pp. Includes photographs.
13 11 183. Progress Report on Evaporation from Oil and Water Surfaces. 1930. 12pp. Includes photograph.
13 12 184. Oil Evaporation, 1929. 1929. 9pp.
13 13 185. Progress Report on Evaporation from Oil and Water Surfaces, C. Rohwer, May 1930. 1930. e30pp. Includes photograph.
13 14 186. Salt Evaporation, 1930. 1929-1930, undated. e40pp.
13 15 187. Evaporation from Sodium Chloride Solutions Report, 1931. 1931. e20pp. 2 copies. Includes photographs.
14 1 188. Evaporation from Common Salt Solutions, Original Draft, 2 copies of final draft. 1930-1931, undated. e45pp.
14 2 189. Evaporation from Salt Solutions and oil-covered water surfaces, Carl Rohwer, Jan. 1932. 1930-1931, undated. e55pp.
14 3 190. Evaporation from Salt Solutions and Oil Covered Water Surfaces, 1932. 1932. e150pp.
Includes several drafts of the same report; most include 3 photographs.
14 4 190. Evaporation From Salt Solutions and Oil Covered Water Surfaces, 1932 -- Evaporation Symposium, Discussion and Closure, Jan. 1934. 1933, undated. e35pp.
14 5 192. Printer's Copy, Evaporation Report. 1930-1931. e60pp.
14 6 194. Ditto Copies of Evaporation Report. 1927-1930. e160pp. Includes photographs.
14 7 195. Evaporation from Free Water Surfaces Report, 1929. 1929-1930. e125pp. Includes photographs.
15 1 196. Stonyford Obs. for Evaporation Report, 2 copies. 1930. e60pp. Includes photographs.
15 2 197. Evaporation Articles. 1929-1932, undated. e150pp. Includes photographs.
15 3 198. Pictures of New Gurly Hook Gages. 1933. 4pp. Includes photograph.
15 4 199. Anemometer Comparison Diagrams. 1927-1930. 11pp.
15 5 200. Evaporation from Water Surfaces Under Open Air Conditions by N.W. Cummings, Scripps Institute, March 1923. 1923. 43pp.
15 6 202. Photostat of U.S.G.S. Evaporation Pan. 1927, 1929. 3pp.
15 7 203. Psychrometer Table. 1927, undated. 10pp. Includes photograph.
15 8 204. Weather Bureau Class A Pan, Instruction Bulletin. 1917, 1919, 1929, undated. e25pp.
15 9 205. Climatological Data for U.S. California Sections, Oct., Nov., Dec. 1930. 1931, undated. 8pp.
15 10 206. Grunksky's Evaporation Article, U.S. Weather Review. 1932. e50pp.
15 11 207. A History of Numbers, Carl Rohwer, 1933. 1933. e40pp.
15 12 208. Seepage from Canals, California, Yellow Copy - pencil. undated. e85pp.
15 13 209. Field Measurements of Water, Colorado Well Drillers Association, Jan. 18, 1932. 1933. e50pp.
15 14 210. Twin Falls Headgate Calibration Report, 1934. 1933. e50pp. Includes photographs.
15 15 211. Project Data for Bureau on Budget, 1932. 1932, undated. e25pp.
15 16 212. Least Square Adjustment of Experimental Data. undated. 16pp.
15 17 215. Proposed Pump Installation in Drain East of R.R. Tracks, July 1934. 1931, 1934-1935, undated. e30pp.
15 18 216. Memorandum Concerning Project work 1935 and 1936. To Berkeley Office Nov. 23, 1934. 1934-1936, undated. e50pp.
15 19 217. Friez Recorder, Sept. 1933. 1933. 4pp.
15 20 218. Adaptation of Principle of Vortex Tube, Trapping Bed Load from All-American Canal. 1935, undated. e40pp.
15 21 219. Subsistence Homestead Project, Littleton, Colorado, Jan. 1935. 1924-1925, 1933-1934, undated. e50pp.
Includes "Sketch map of Harriman-Arnett Ditch System, Bowles Reservoir System, and the Boundary Lines of the May-Osner Farms."
16 1 220. Evapo-Transpiration Summary Report, L.R. Brooks, May 1933. 1929-1933, 1937-1940, undated. e200pp. Includes photographs.
16 2 221. Adjustable Tube Orifice Meter, Dec. 1934-Mar. 1935. 1928-1935, undated. e150pp.
16 3 222. Memorandum Concerning Water Facilities Program, Popo Agie Drainage Basin, Fremont County, Lander, Wyoming. R.L. Parshall, May 1939. 1939. 20pp.
Includes large map of the "Popo Agie Drainage Basin."
16 4 223. Mandan Project [North Dakota], Sept. 1934. 1934-1935, undated. e150pp. Includes photographs.
16 5 224. Pump Data for Mandan Project. 1930-1935, undated. e45pp.
16 6 225. Modified Flume Data Bellvue Laboratory, 1932, and Modified Parshall Measuring Flume under Special Conditions of Operation and Progress Report on Tests of Modified Parshall Measuring Flume, February and March, 1935. 1932, 1935, 1967, undated. e250pp.
16 7 227. Addition to Laboratory, Aug. 1935. 1933-1935, undated. e80pp.
17 1 228. Progress Report of Studies of the Grating Type of Sand Trap Conducted at Bellvue and Fort Collins by Walter B. Leaf, Oct.-Dec. 1934. 1933-1935, undated. e250pp.
17 2 229. Twin Lakes Transmountain Diversion Tunnel, Oct. 1934. 1934-1935. e75pp. VIEW
17 3 230. Effect of Obstructions in Converging Section 2-foot Parshall flume, Bellvue Laboratory Sept. 1927 and Fillets in 1-foot Parshall measuring flume, Campus Hydraulic Laboratory, Feb. and March, 1935, Shingle Obstructions. 1927, 1935, undated. e70pp. VIEW
17 4 231. Motor Driven Vortex Tube Model, March 1933. 1933. 2pp.
17 5 232. T.H. Summers Report [on farm housing survey]. 1934. e85pp. VIEW
17 6 233. Arkansas Valley Farm Data for Rehabilitation Corporation and Correspondence. 1933-1935, undated. e85pp. VIEW
17 7 234. Supplemental Water Supply along Purgatoire River. 1935, undated. 24pp. VIEW
17 8 236. Control Section Meter with Vertical Contraction. 1925-1926, undated. e100pp.
17 9 237. Moffat Water Diversion Project, 1935 [Folder 1 of 2]. 1934-1935, undated. e75pp.
Contains book of blueprints for the Moffat Tunnel.
18 1 237. Moffat Water Diversion Project, 1935 [Folder 2 of 2]. 1934-1935, undated. e65pp. VIEW
18 2 238. Sand Creek Siphon in Burlington Canal, 1935. 1909, 1918-1919. 3pp.
18 3 240. New Current Meter Station, November 1935. 1935. e25pp. VIEW
18 4 241. 1935 Census Report [on agriculture]. 1935. e300pp.
18 5 242. Water Supply Reports, San Luis Valley Farms for Rehabilitation Corp. 1929-1935, undated. e70pp. VIEW
18 6 243. Fort Lewis School Seep stream pump and pipeline, also 1950 report. 1934-1935, 1950, undated. e100pp. VIEW
18 7 244. Report, Wyoming Reclamation Association, 1936. 1936. e75pp. 2 copies VIEW
18 8 245. Proposed Demonstration Project Area, El Paso County, 1936. 1936. e35pp. VIEW
18 9 246. Sand Creek Ditch System, Eaton. 1905, undated. 1 blueprint and 7 photographs VIEW
18 10 247. Simplex Totalizing, Indicating Meter for Parshall Measuring Flume. 1935-1936, undated. 11pp. VIEW
18 11 248. Silt Experiments Made in India, Summary of Report and Drawings of Silt Vanes. undated. 6pp. VIEW
19 1-2 249. Loup River Public Power District Report [Nebraska]. 1935, undated. e120pp.
Includes a detailed map and several blueprints.
19 3 250. 10-Foot Flumes for Grand River and Skyline, Water Supply and Storage Co., Sept. 1936. undated. e40pp.
19 4 251. 20 Foot Parshall Measuring Flume, Florence - Casa Grande Canal, Coolidge, Arizona, March 1936. 1927, 1932, 1936, undated. e60pp.
19 5 252. Nymboida Hydro-Electric Undertaking, Grafton, New South Wales, Sept. 1936. 1936-1937, undated. e40pp. Includes photographs.
19 6 253. Adjustable Tube Orifice Meter Tests, Silt Laboratory, El Centro [California], February 1936. 1936, undated. e50pp.
19 7 254. Cost of Pumping for Irrigation in Colorado. 1930, undated. e100pp.
19 8 255. Mms Bulletin 415 Construction of Irrigation Wells in Colorado. 1934-1936, undated. e100pp. Includes photographs.
19 9 256. Bulletin No. 433 [on irrigation pumping], Mms., Correspondence. 1935-1936, undated. e200pp.
20 1 257. Questionnaire to County Agents on Pumping, 1928. 1928. 21pp. VIEW
20 2 258. Laboratory Well Experiment, 1934, 1935, Notebooks in Code's desk. 1934-1936, undated. e50pp. Includes photograph.
See Series 2 for 2 nitrate negatives.
20 3 262. Minutes of the Meetings of the Western Irrigation and Drainage Association, 1936 and 1938, 1929. 1929, 1936-1939. e120pp. VIEW
20 4 263. Report of Survey Committee to State Board of Agriculture, May 1938. 1938, undated. e35pp. VIEW
20 5 266. Memorandum Concerning Siphonic Type of Sand Trap, R.L. Parshall. 1939, undated. 8pp.
20 6 267. The Status of Supplemental Irrigation Loan Applications, as of Oct. 5 1939 on the Moreau, Grand and Missouri Rivers and in the Timber Lake Shallow Water Area, Rohwer. 1939. 5pp. 2 copies
20 7 268. Memorandum Concerning Water Storage and Conservation Prepared by the Colorado Experiment Station for the Agricultural Clearing Committee, R.L. Parshall, 1935. 1935. 10pp. VIEW
20 8 269. Control of Sand and Sediment in Irrigation Power, and Municipal Water Supplies, 1933. Vortex-Tube and Riffle Deflection Sandtraps. 1933, undated. e30pp.
20 9 270. Revision, Station Bulletin 386, Parshall Measuring Flume. 1928, 1936, undated. e150pp.
20 10 271. La Plata Report, 1935 Rohwer. 1930, 1933-1935, undated. e150pp.
20 11 271. La Plata Project, 1935, Correspondence. 1934, undated. e75pp. VIEW
20 12 271. La Plata Report. 1934, 1936. e75pp.
Includes the final report.
21 1-2 272. Specifications, Great Plains Experiment Station Dam, Cheyenne, Wyoming, May 1930. 1929-1931, undated. e250pp.
21 3 272. Photostat of Specifications, Great Plains Station, 1930. 1930. e40pp.
21 4 272. Correspondence, U.S. GP Exp. Sta., Exp. Station Row, Estimates #1, 2, 3, and final, also notice of completion of work. 1929-1931, undated. e80pp.
21 5 273. Sprinkler System, Woodward, Oklahoma, 1938. 1938-1939, undated. e50pp.
21 6 274. Preliminary Report, Bridgeport Irrigation District, Dec. 1938, Carl Rohwer. 1915-1916, 1938-1939, undated. e50pp.
21 7 275. Trend in Evaporation Experiments, Paper for Hydraulics Conference, Iowa City, Iowa, June 1939. 1945, undated. e75pp.
21 8 276. Cost Data, Irrigation Wells, 1938, Carl Rohwer. 1937-1938, undated. e50pp.
21 9 277. Well Bulletin Data, 1935. 1935, undated. e65pp.
Includes "Underground Water Law" by Wells A. Hutchins.
21 10 278. BPI [Bureau of Plant Industry] Evaporation Pan, Pictures. undated. 3pp. (no pictures)
21 11 279. Texas Irrigation Data, 1935. 1932-1935. e100pp.
21 12 280. Specifications, Cold Springs Creek Dam, Custer County, South Dakota, 1929. 1929. e50pp.
21 13 281. Parshall Flumes, 1935, Platte Valley, Evans No. 2, Burlington Ditch. 1935, undated. e25pp.
21 14 282. Model Tests, Laramie-Poudre Tunnel Flume, West Portal, Sept. 1937. 1937, undated. 14pp. Includes photographs.
22 1 283. Elements of Q Curves, Fred C. Scobey. 1933-1935, undated. e40pp. VIEW
22 2 284. Automatic Sand Sampling Device, 1939. undated. 1 blueprint VIEW
22 3 285. Acre-Foot Integrating Instrument, May 1938. undated. 2pp. VIEW
22 4 286. Amity 20-Foot Flume, Notes Concerning New Floor, March 1938. 1937-1938, undated. 14pp. VIEW
22 5 287. Laboratory Measurement of Evapo-transpiration Losses, R.L. Parshall, June 1937, Water Resources of Colorado, 1937. 1937. e65pp. VIEW
Includes copies of papers Parshall presented at conventions.
22 6 289. Radio Broadcast, Feb. 19, 1935, KOA, C. Rohwer. 1935. e20pp. VIEW
Includes drafts of "How to Get the Most out of a Limited Supply of Irrigation Water."
22 7 290. Mms. "Improved Venturi Flume," R.L. Parshall, 1927. 1927, undated. e75pp. Includes photographs. VIEW
22 8 290. Printer's Copy, Improved Venturi Flume, Revised Dec. 1927. 1927, undated. e150pp. VIEW
22 9 292. Discussion of Paper by Yarnell and Nagler on Effect of Turbulence on Cup and Propeller Meters, 1930. 1930, undated. 14pp. VIEW
22 10 293. Fort Warren Dam [Wyoming], 1931. 1914, 1919, 1930, undated. e30pp.
22 11 294. Free-Flow Discharge Tables, Parshall Measuring Flumes, Large Size, 20 ft., 25 ft., 30 ft., 40 ft., and 50 ft. undated. 9pp. VIEW
22 12 295. Mms. "Large Parshall Measuring Flumes," R.L. Parshall, 1932. 1931-1932. e125pp. VIEW
Contains 2 copies of the report, 1 copy includes photographs.
22 13 296. Submerged Flow Measurements on Bijou Flume, July 1932. 1932, undated. e25pp. VIEW
22 14 297. Publication Material Supporting Irrigation Research, 1934. 1934, undated. e100pp. VIEW
Includes "Western Irrigation," Vol. 16, no. 6, and newspaper clippings.
22 15 298. Pumping Bulletins and Data, 1932. 1928-1931. e200pp.
Includes "Pumping for Irrigation in the Kearney, Nebraska, District" by A. Lincoln Fellows.
23 1 299. Pumping Bulletin Data, 1932. 1922, 1930-1934, undated. e125pp. VIEW
Includes map of the Turlock Irrigation District and project map for the San Carlos Irrigation Project.
23 2-3 300. Mms. "The Parshall Measuring Flume," 1935. 1927, 1935, 1938, undated. e200pp. VIEW Folder 1 Folder 2
Includes 2 copies of "The Parshall Measuring Flume" and photographs.
23 4 301. Pipe Flume, 1935. 1932, 1935, undated. e75pp. Includes photographs. VIEW
23 5 302. Miscellaneous Data, Irrigation Well Report, Dec. 1935. 1932-1935, undated. e250pp. VIEW
23 6 303. Measuring Devices, Big Laramie River Basin, 1936. 1936. 20pp. VIEW
24 1 304. Pencil Copy, Manuscript on Irrigation Wells, Carl Rohwer, December 1935. 1936. e250pp. VIEW
24 2 305. Yellow Copy, Mms. "Irrigation Wells," Carl Rohwer, 1936. 1936. e200pp. Includes photographs. VIEW
24 3 306. Mms. "Irrigation Wells," Carl Rohwer, 1936. 1934-1938, undated. e125pp. VIEW
Includes information on Salt River Project (Arizona) and photographs.
24 4 307. Pingree Park Reservoir, 1936. 1936. 3pp. VIEW
Contains map and data.
24 5 308. North Sterling Reservoir Outlet, 20-Foot Parshall Measuring Flume, Oct. 1937. 1937-1938, undated. 12pp. VIEW
24 6 309. State Planning Notes and Data, 1937. 1937. e75pp. VIEW
Contains meeting minutes, reports, and letters related to Colorado Agricultural Clearing Committee.
24 7 310. Correspondence on Irrigation and Drainage Research Association, Asilomar, Pacific Grove, California, June 30, 1938. 1938. e75pp. VIEW
24 8 311. Drawing of Suite of Offices in Civil [Engineering] Building. undated. 1p. VIEW
24 9 312. Matters Concerning Cooperative Agreement Projects [between Colorado Agricultural Experiment Station and USDA Soil Conservation Service], 1939. 1936, 1939-1940, undated. e100pp. VIEW
25 1 313. Mms. "Small Irrigation Pumping Plants," Carl Rohwer and M. R. Lewis, 1939. 1939-1940. e200pp. VIEW
25 2 314. Yellow Copies, Pencil Copy, Small Irrigation Pumping Plants Manuscript, March 1939, M.R. Lewis, Carl Rohwer. 1939, undated. e200pp.
25 3 315. Report, "Memorandum Concerning Sand Traps," R.L. Parshall, June 12, 1940. 1940. 7pp. VIEW
25 4 316. Middle Loup Sand Trap, March 1940, Arcadia, Nebraska. 1940. 16pp.
25 5 317. Recording Instrument, Nebraska, 1940. 1938-1940. 7pp. Includes 3 blueprints.
25 6 318. Revision of Bulletin 1683, August 1940. 1940-1941. e125pp. Includes photographs. VIEW
25 7 319. Colorado-Big Thompson, Economic and Water Data. 1935-1937, undated. e100pp. VIEW
Includes charts containing data on river flows, canals, and crops.
25 8 320. Colorado-Big Thompson Report, W.H. Sawhill. 1933-1936, undated. e250pp. VIEW
Contains information and drafts for report on an economic irrigation survey.
26 1 321. Grand Lake Project. 1925-1926, 1935-1937, undated. e200pp. VIEW
26 2 321. Grand Lake Project. 1910, 1937, undated. e30pp. VIEW
Includes "Conservation of Water in Colorado" by Charles A. Lory and newspaper clippings.
26 3 321. Colorado-Big Thompson Diversion Project Will Bring Another Poudre River to Northern Colorado Lands. undated. 5pp. VIEW
26 4 Grand Lake - Big Thompson Report. 1935, undated. e45pp. VIEW
26 5 Colorado-Big Thompson. 1936-1937, undated. e25pp. VIEW
Includes map of the proposed Colorado-Big Thompson Diversion project.
26 6 Colorado-Big Thompson. 1935-1936, undated. e80pp. VIEW
26 7 321. Colorado-Big Thompson Project. undated. e150pp. VIEW
Includes Colorado River data.
26 8 To Greeley-Tribune, Grand Lake Project, Mr. Glenn Williams, Greeley, Colorado. undated. 4pp. VIEW
Contains charts and data.
26 9 321. W.H. Sawhill, Sawhill. 1936, undated. e30pp. VIEW
Contains South Platte River straight-line diagram and drafts of "Memorandum Concerning the Economic Features of the Colorado-Big Thompson Project."
26 10 321. Misc. Notes Grand Lake Project. 1936-1938, undated. e200pp. VIEW
Includes Parshall's notes on the CBT project, a South Platte River straight-line diagram, Articles of Incorporation of the Northern Colorado Water Users Association, 3 maps of the CBT project, and newspaper articles and pamphlets.
26 11 321. Grand Lake - Big Thompson Project, "Tentative Outline of Report, Economic Irrigation Survey of Northern Colorado," R.L. Parshall. 1936-1941, undated. e100pp. VIEW
26 12 322. Results of Tests on Spacing of Wells and Amount of Interference, Topeka, Kansas. undated. 2pp.
27 1 323. Desilting Laboratory, Rositas Dam, All-American Canal [California], 1934. 1932-1934, undated. e40pp.
27 2 324. Mms. Irrigation Wells, 1938. 1938-1941. e150pp.
Includes other papers and photographs.
27 3 325. Evaporation Data, 1939. 1937-1939. e75pp.
27 4 326. Report "The Silt Problem of the Imperial Dam and the All-American Canal," by C.P. Vetter, Bureau of Reclamation, Discussion by R.L. Parshall, Presented: American Society of Civil Engineers, July 26, 1940. 1940. 8pp. 2 copies
27 5 328. Pencil Copy, M.M.S., Design and Operation of Small Irrigation Pumping Plants by Carl Rohwer, June 12, 1940. 1940. e125pp.
27 6 328. Yellow Copy, Design and Operation of Small Irrigation Pumping Plants, June 12, 1940. 1940. e125pp. Includes photographs.
28 1-2 329. Design and Operation of Small Irrigation Pumping Plants, Two Copies of M.S.S. 1940-1943, 1950, undated. e400pp. Includes photographs.
28 3-5 329. Connected Yellow Copy, Design and Operations of Small Irrigation Pumping Plants, December 1940, also, Data on Automobile Engine Horsepower and Cost of Pumping for Irrigation. 1922, 1936-1941, undated. e500pp. Includes photographs.
29 1 330. Discharge for Salt River near Chrysotile [Arizona], Oct. 1, 1936-Jan. 31, 1941. 1941, undated. 10pp.
29 2 331. Working Plan for Runoff Studies, Black Squirrel Creek Project, Colorado Springs, 1939, Krimgold. 1938-1939, undated. e75pp.
29 3 332. State Federation of Federal Employees, Oct. 1939. 1939. e50pp.
Includes "Minutes of Fifth Annual Convention, Colorado State Federation of Federal Employees Union."
29 4 333. Unfinished Paper by R.L.P. undated. e50pp. VIEW
29 5 334. Use of Materials, Cotton Ditch and Canal Lining, 1938-1940; Channel Lining Project, May 1938. 1925, 1938-1942, undated. e100pp.
29 6 334. Use of Materials, Cotton Ditch and Canal Lining, 1938-1940; Material on Lining Ditches. 1930, 1937-1941. e200pp.
Includes photographs, newspaper clippings, and lining material samples.
29 7 335. Convention, 1940 American Society of Civil Engineers, Denver. 1935-1940. e60pp.
29 8 336. Plans and Blueprints for Snow Survey Shelter Cabin. 1934-1939, undated. e40pp. VIEW
29 9 337. Detailed Report of Cooperative Snow Survey Courses, Geo. D. Clyde, 1935, Colorado and Wyoming. 1935. e100pp.
Only includes Wyoming.
30 1 338. H. Caperton's Computation Data on Snow Observations, 1936-1937. 1936-1937. e60pp.
30 2 339. Altitude Precipitation Records. 1935, undated. e25pp.
30 3 340. Snow Surveys as a Logical Engineering Problem, R.L. Parshall, 1939. 1939. 10pp. VIEW
30 4 341. Unification of Nomenclature Pertaining to Water, Snow, and Ice, R.L. Parshall, 1939. 1939, undated. e75pp.
30 5 342. Forest Influence Studies at Fraser Experimental Forest, Fraser, Colorado, 1939. 1920, 1924, 1937-1939, undated. e40pp.
30 6 343. An Experiment to Determine Snow Density Change During the Deposition and Melting Periods, 1940. 1940, undated. 11pp.
30 7 344. Philippine Engineering Record, 1939, "Runoff Studies in the Philippines". 1939. 32pp.
30 8 345. 1-, 2-, 3-, 4-, 8-ft. Parshall Measuring Flumes, Left Hand Creek near Boulder, Feb. 1941. 1941. e30pp.
30 9 346. Correspondence Leading to a Plan for Purchasing Pumps, 1929-1930, Code. 1929-1930. e120pp.
30 10 347. Well Characteristics Data Preparatory to Field and Laboratory Work on that Project, 1930, Code. Data Also Filed Under #348. 1928-1931, undated. e120pp.
30 11 348. Report on Field Experimental Wells and of Permeability Tests in Laboratory, 1931, Proceedings A.G.U., 1937. Related Data filed under 347, Code. 1931-1933, 1937, undated. e150pp.
Includes Code's notebook.
31 1 349. Geophysics, Resistivity Method as Related to Prospecting for Water, Code. 1925, 1930-1934, 1937, 1957, undated. e175pp.
31 2 350. Campus Pumping Plant. 1926-1929, undated. e45pp.
31 3 350. Dayton-Dowd Pump Data. 1928-1931, undated. e75pp.
31 4 350. Campus Pumping Data. 1927-1929, undated. e125pp.
31 5 351. Campus Irrigation Development, April 1929. 1929, undated. 12pp.
31 6 352. Fall Creek Dam, 1939, Code. 1938-1940, undated. e200pp.
31 7 353. Discussion of Mr. Lofgren's Paper, "Correlation of Snow Cover with Stream Runoff," Association of Western State Engineers, Phoenix, Arizona, November 8, 1939, R.L. Parshall. 1938, undated. e25pp.
31 8 354. Calibration Tests on Crozier Farm, 1937, Bailey Tube vs. Parshall flume. 1932, 1937-1938. e70pp. Includes photographs.
32 1 355. Windsor Beet Irrigation Experiment, 1939. 1939. e100pp. Includes photographs.
32 2 356. Senate Bill #96 and 97, 1935. undated. e20pp.
32 3 357. Fred Krumdick Farm, S.C.S. Project. 1938-1939. e45pp.
32 4 358. Report on cause of Slides, Experiment Station Dam, Woodward, Oklahoma, June 11, 1941. 1941-1942. e75pp. Includes photographs.
32 5 359. Transmountain Diversion, July 26, 1941. 1938-1941, undated. e25pp.
Includes 1938 map of proposed reservoirs and transmountain diversions in Upper Colorado River Basin.
32 6 360. List of Irrigation Projects over 5,000 Acres together with Name of Secretary or Superintendent. 1942. 11pp.
32 7 361. Filings on Irrigation Wells in State Engineers Office [for Irrigation District 1, Water District 2, and 8]. 1941, undated. e50pp.
32 8 362. Use of Current Meters in Measuring Pipe Discharges, Yellow Copy Mms, Carl Rohwer, April 1942. 1942, undated. e200pp. Includes photographs.
32 9 362. Use of Current Meters in Measuring Pipe Discharges, Two Copies of MSS. 1942, undated. e150pp. Includes photographs.
32 10 363. Original and Yellow Copy of Report, The Discharge of Pipes Flowing Partly Full, Carl Rohwer, June 1942. 1942-1943, undated. e125pp. Includes photographs.
32 11 364. Well Drilling Contract Forms, Mimeographed. 1943. 8pp. 2 copies
33 1 364. Well Drilling Contract Forms, 1942, 1943. 1935, 1943-1944, 1949, undated. e200pp.
33 2 365. Pump Dealers Uniform Performance Statement, Accepted methods of measuring water. 1930-1932, undated. e50pp.
33 3 366. Correspondence Re sale of 10" Suction hose, Jan. 1943. 1942-1943. 13pp.
33 4 367. Landlord-Tenant Agreements. 1937. 3pp.
33 5 368. Recording of Irrigation Wells with County Recorder, 1941. 1941. 10pp.
33 6 369. Emergency Rubber Project [California], 1942-1943. 1938, 1941-1943, undated. e200pp.
33 7 371. North Poudre System Annual Reports. 1932-1948. e100pp.
33 8 372. Seepage Tests, Love Farm Lateral, Gilcrest, Colorado, March 13, 1944. 1944. 13pp. Includes photographs.
33 9 373. Bulletin Mailing List, Circular #678, 1943. 1943. e40pp.
33 10 374. 8-inch Venturi Meter in Hydraulic Laboratory. 1937, 1940-1942, undated. e50pp.
33 11 375. Pueblo Hospital Irrigation, W.E. Code, Campus. 1935, 1940, undated. e65pp.
34 1 376. Use of Groundwater in South Platte, Correspondence (Bulletin 483) and Original Forms. 1940-1943, undated. e150pp.
Includes photographs and map of "Location of Irrigation Wells in South Platte River Basin."
34 2 377. Pumping Problems of the High Plains of Texas, Carl Rohwer, October 1944. 1932-1947. e200pp. Includes photographs.
34 3 378. Pacific Region [Washington and Oregon] Reports for S.C.S. 1944, undated. e125pp.
34 4 379. Discussion of Hickcox's Paper on Evaporation by Carl Rohwer. 1944, undated. e50pp.
34 5 380. Nemenjis ground water bibliography. 1944, undated. e85pp.
34 6 381. H.M. Finley Drainage, 1942. 1942-1944, undated. e50pp.
34 7 382. Collins Meter Data, W.E. Code. 1930-1940, undated. e50pp. Includes photographs.
34 8 383. Pump Test Information, Irrigation Manual Data, Your Pumping Plant in War Time, Carl Rohwer. 1943-1945, undated. e150pp.
34 9 384. Tests on 18 x 29 Armco Pipe arch culvert, Bellvue, August 2, 1945. 1945, undated. e45pp.
35 1 385. Seepage Report, 1945, Pencil Copy, Yellow Copies. 1946-1947, undated. e200pp. Includes photographs. VIEW
35 2 385. Pencil Copy, Seepage Report, August 18, 1945. 1923-1931, 1941-1945, undated. e200pp. Includes photographs. VIEW
35 3 386. Use of Ground Water for Irrigation in South Platte Basin in 1940, Mms and Notes. 1939-1943, undated. e65pp. VIEW
35 4 387. Groundwater Supply, Prospect, Ms. and Notes. 1930-1932, 1939-1945, undated. e200pp. Includes photographs. VIEW
35 5 388. Bibliography of Evaporation and Transpiration, C. Rohwer, Dec. 1945. undated. e50pp. VIEW
36 1 390. Hydraulics of Water Wells, Paper for Annual Meeting American Society of Civil Engineers, Jan. 18, 1946. 1945-1946, undated. e150pp.
36 2 391. Reports for Yearbook on Pumping for Irrigation, Seepage from Irrigation Channels, 1946 by Carl Rohwer. 1946, undated. e40pp. Includes photographs.
36 3 392. Sub-committee, Post-war settlement. 1944. 9pp.
36 4-5 393. Canal Lining Manual, July 29, 1946. 1945-1947, undated. e250pp.
36 6 393. Canal Lining Manual, Utah Gunite Cost Data, USBR Canal Lining Pictures. 1945-1947, undated. e80pp. Includes photographs.
36 7 394. Test of H. Zeiler Pump, 1946. 1946, undated. e25pp. Includes photographs and negatives.
36 8 395. Big Sandy [Colorado] Report. 1944-1945, undated. e75pp.
36 9 396. Lucas-Felger case. 1946-1947, undated. e50pp.
See Series 2 for 6 nitrate negatives.
36 10 397. Report on Woodward Dam [Oklahoma], Spillway Break, Carl Rohwer, January 1947. 1947, undated. e50pp. Includes photographs.
36 11 398. Return Flow Records. 1938 May. e25pp.
Contains "Through the Leaves" issue.
37 1 400. Seepage from Irrigation Channels (Revised) April 25, 1947. 1947. e200pp. Includes photographs. VIEW
37 2 401. Big Thompson Project, Bureau of Reclamation Land Classification and List of Pumping Plants. 1947, undated. e100pp. VIEW
37 3 402. List of Observation Well Measurements for Publication in W.S. Paper Users. 1946-1957, undated. e150pp. VIEW
37 4 403. Sunday Air Cleaner for Cylinder Pumps, Tests 1943. 1943, undated. e60pp. Includes photographs. VIEW
37 5 404. Logan [Utah] Irrigation Conferences, 1944-1945. 1943-1945, undated. e100pp. VIEW
37 6 405. Beckham (Winslow) Observation Well, 1941. 1941. e45pp. VIEW
37 7 406. Floyd Brown's Annual Report on Irrigation, 1946. 1946-1947. e35pp. VIEW
37 8 407. Historical Notes on Ground-Water Development [in California], Carl Rohwer, May 1948. 1948. e45pp. VIEW
37 9 408. Bureau of Reclamation Contracts with Water Users Association, Etc. 1931, 1935, 1941, 1944. e45pp. VIEW
37 10 409. Reports, Colorado Big Thompson Project. 1936-1937, 1940, 1948. e125pp. VIEW
37 11 410. The Mountain Meadow Problem, Green River, Wyoming. 1944-1946, undated. e75pp. VIEW
38 1 411. Irrigation Equipment and Structures by R. L. Parshall, Agricultural Yearbook, 1943-1947. 1946, undated. e55pp. Includes photographs.
38 2 413. Robert Heath Agreement on Pump Test, 1944. 1944-1945. 5pp.
38 3 415. Original Tables, Charts, Drawings, and Pictures, Hydraulics of Well Screens by Gilbert Corey, July 1949. undated. e30pp. Includes photographs.
38 4 416. Friction Losses in Valves and Fittings, Carl Rohwer, July 21, 1949, Pencil and Yellow Copies. 1949. e150pp. Includes photographs.
38 5 416. Friction Losses in Valves and Fittings, Carl Rohwer, July 21, 1949, Tables. 1949, undated. e20pp.
38 6 417. Run-Off Studies, Colorado Springs etc. [Colorado, Arizona, New Mexico], by H.K. Rouse, 1945. 1945-1947. e65pp.
38 7 418. Irrigation of New Athletic Fields. 1947, undated. e45pp.
38 8 419. San Luis Valley Transpiration Project Proposed-Dropped, 1948. 1948. e25pp.
38 9 420. Robert Dunbar's Paper, Colorado System of Stream Control, 1949. 1949-1950. e27pp. 3 copies
38 10-11 421. Revision of Circular #576, Jan. 1949, C. Rohwer, Pumping Cost Data, 1949. 1942-1950. e400pp.
39 1 422. Miner's Inch. 1945. e65pp
39 2 423. Report on Bailey Report, Big Sandy [Creek, Cheyenne County, Colorado], W.E. Code. 1945-1947, undated. e50pp.
39 3 424. Irrigation Conference Papers, Colorado A and M, Dec. 1949. 1949. e75pp.
39 4 425. A.J. Hamman's Annual Report for 1949. 1949. e100pp. Includes photographs.
39 5 426. Reverse Rotary Well Drilling, Code 1949. 1949. e75pp. Includes photographs.
39 6 427. Progress Report, Study of Seepage from Canals by Carl Rohwer, May 1950. 1950, undated. e40pp.
39 7 429. Report on Soils, Horticultural Plot Seepage Experiment by Ralph L. Rollins, 1950. 1950, undated. e30pp. Includes photographs.
39 8 430. Seepage Losses Progress Report for 1950. 1950. e40pp.
39 9 431. Measuring Water in Irrigation Channels by R.L. Parshall, U.S.D.A., S.C.S., Div. of Irrigation. 1948-1950. e150pp. Includes photographs.
39 10 432. Use of Current Meters in Measuring Pipe Discharges, C. Rohwer, 1942. 1942. e125pp.
39 11 433. Integrating Turbine, Herb Schweizer, 1952. 1950, undated. e75pp.
39 12 434. Campus Storm Sewer. 1940-1944, 1951, 1959-1961, undated. e200pp.
Includes information on a campus flood. Folder also includes maps of campus, newspaper clippings, slides, and negatives.
40 1 435. Revision of Bulletin 386, Parshall Flumes of Large Size. 1952. e100pp. Includes photographs.
40 2 436. Bonny Dam Test Holes [Nebraska], United States Bureau of Reclamation, 1947. 1947. 4pp. Includes large map.
40 3 437. Airport (College) Sprinkling Plans, 1940. 1940-1941, undated. e125pp.
40 4 438. Steel forms for ditch linings, 1947. 1947-1948, undated. e150pp. Includes 41 photographs.
40 5 439. Colorado State Hospital. Matters Relating Thereto. 1947. 11pp.
40 6 440. Selection of Gravel Pack for Wells, Thesis of John R. Lockman, 1954. 1954. e130pp. Includes photographs.
40 7 441. [Louis] Carpenter's field data artesian well, San Luis Valley. 1890-1901, undated. e100pp.
40 8 442. Logan [Utah] Subcommittee Report. 1944-1945, undated. e150pp.
40 9 443. Revision of Bulletin 1683, Measuring Water in Irrigation Channels, 1950. 1940, undated. e100pp. Includes photographs.
41 1 444. Canal Lining Manual, Typed Copy. 1946-1948. e50pp.
41 2 445. Seepage Losses in Irrigation Channels. undated. e200pp. Includes photographs.
41 3-4 446. Seepage Losses in Irrigation Channels. 1947-1948. e250pp. Includes photographs.
41 5 447. Seepage of Water from Channels, Rohwer, 1931. 1929-1931. e125pp. Includes photographs.
41 6 448. C. F. and I. Supply Canal [Minnequa], 1943. 1942-1943, undated. 7pp.
42 1 449. Sand Trap, Shoshone Tunnel, 1939. 1938-1939. 10pp.
42 2 450. Los Angeles, April 16-45, Colorado River Water Forecast Committee Meeting. 1940, 1945, undated. e45pp. VIEW
42 3-4 451. Los Angeles, [Colorado River] Water Forecast Committee, April 16, 1945. 1944-1946. e300pp. VIEW Folder 1 Folder 2
Includes photographs and "Transcript of meeting, Columbia River Basin Interstate Water Forecast Committee."
42 5 452. Tag Ends, 2nd Annual Report [Colorado River Water] Forecast Committee, Los Angeles, April 1946. 1947. e40pp. 2 copies, 1 incomplete VIEW
42 6 453. Los Angeles Meeting, [Colorado River Water Forecast Committee], April 16, 1947. 1947, undated. e150pp. VIEW
43 1 454. Forecast of Bright Angel, Colorado River as Based on Tributaries, Materials for Los Angeles, April 16, 1947, R.L. Parshall. undated. e50pp. VIEW
43 2 455. Jackson Ditch 7-Foot Flume, Thompson Farm, May 1947. 1947, undated. e25pp. VIEW
43 3 456. Improving the Distribution of Water to Farmers by use of the Parshall Flume, 1943. 1943. e50pp. 2 copies. Includes photographs.
43 4 457. Amen-Stroh-Franz Lateral Problem, May 1944. 1944, undated. e80pp.
43 5 458. Canal and Ditch Section, Greede, Discharge Diagrams, Soil Conservation Service, 1944. 1944. 6pp.
43 6 459. Snow Survey Forum, Paget and Parshall, Dec. 1946. 1946-1947, undated. e80pp. VIEW
Includes poetry.
43 7 460. American Geophysical Union, Parshall, 1943. 1942-1943. 53pp.
43 8 461. C.F. and I. Supply Canal, Model Tests on Drop Structure, 1942. 1942-1943, undated. e40pp.
43 9 462. Foxboro Report. 1946-1948, undated. e50pp. VIEW
44 1-2 463. Los Angeles, [Colorado River Water Forecast Committee], April 16, 1947. 1945-1948. e300pp. VIEW Folder 1 Folder 2
44 3 464. Wells, Pumps and Related Structures for Irrigated Land, Carl Rohwer, October. 1954, undated. e125pp. VIEW
44 4 465. Buffer Pond Experiments by Hayden K. Rouse. 1949. 10pp.
44 5 466. Use of Concrete in Irrigation Systems. 1948-1952, undated. e150pp.
44 6 467. Austin [Colorado] Irrigation, 1949-1952. 1949-1953, undated. e200pp. VIEW
45 1-2 469. Sprinkling, Project Data, Mms. Bulletin 405A, Code. 1945-1954, undated. e250pp. VIEW Folder 1 Folder 2
45 3 470. Charts, Parshall Flumes of Large Size. undated. 9pp. VIEW
45 4 471. Rating Tables, 1"-2" Parshall Flumes. undated. 3pp. VIEW
45 5 472. Canal Seepage, American Society of Civil Engineers, San Diego, 1955. 1955. e75pp. VIEW
45 6 473. Figures, American Society of Civil Engineers Paper, "Seepage," San Diego, 1955. 1950-1951, undated. e20pp.
45 7 474. Water Stage Recorders, Memos. undated. e100pp.
45 8 475. San Luis Valley, Proposed Project Consumptive Use, United States Bureau of Reclamation and Colorado A and M, 1948. 1948, 1955. 10pp. VIEW
45 9 476. Evaporation and Transpiration Report, December 1945. 1945, undated. e75pp.
45 10 477. Tests of 3-Foot Parshall Flume without throat and diverging section and with throat, without diverging section. undated. 2pp.
45 11 478. Report of Tests on Special Hoff Meter for Measuring Losses in Artesian Wells by L.R. Rich, S.C.S. Albuquerque. 1941-1942. 13pp. Includes photographs.
46 1 4. Original data and first draft -- For Mss. Fort Collins Hydraulic Laboratory Weir Experiments. 1913, undated. e45pp.
46 2 5. Mms. Fort Collins Hydraulic Laboratory Weir Experiments, V.M. Cone. 1914, undated. e45pp.
46 3 18. Professional Paper, Mms. Flow over Weirs with Sharp Crest and Full Contractions. undated. e30pp.
46 4 19. Professional Paper, Mms. Flow over Weirs with Sharp Crests and Full Contractions. 1914, undated. e75pp. VIEW
46 5 22. Cipolletti Weir Tables -- Original and Revised. 1915, undated. e35pp. VIEW
46 6 23. Rectangular Weir Tables -- Original and Revised. 1915, undated. e50pp. VIEW
46 7 81. The Exchange System of Irrigation Waters as Applied to Colorado, by R.L. Parshall, August 1921. 1921-1922. e150pp. VIEW
Article focuses on Cache la Poudre Basin; includes map "Irrigation District of Northern Colorado."
46 8 118. Discharge Table and Proportion Table for Lake Canal, Fort Collins. 1924-1926, undated. e50pp. VIEW
46 9 Current Meters, E.J. Hoff. undated. 13pp.
46 10 International Harvester, Howard Barlow. 1949, undated. e100pp.
46 11 6- and 12-inch Sub. Flow flume diagrams, November 27, 1942. 1942, undated. 13pp.
46 12 [The Discharge of Pipes Flowing Partly Full, by Carl Rohwer]. 1941-1943, undated. e50pp.
63 1 Dedication ceremony for plaque honoring the Parshall measuring flume as a historical landmark in agricultural engineering. 1985. e50pp. Includes photographs
63 2 Parshall. 1915-1985. e50pp.
63 3 Parshall flumes. 1924-1977, undated. e50pp. Includes photographs
63 4 Parshall flumes. 1924-1985, undated. e80pp. Includes photographs
63 5 Hydraulics of wells. 1951, undated. e20pp.
63 6 Well screen project. 1947. e20pp.
63 7 Wells. 1949-1951. e60pp.


Series 2: Photographs, 1903-1955 and undated (6.5 linear feet) VIEW PHOTOGRAPHS ONLINE

This series consists of over 4,500 images documenting the Irrigation Investigations Unit. The employees captured and collected these images to visually document their varied and extensive scientific research. They organized the set by their own category outline, and that intellecutual arrangement was maintained here. Each category has a three-digit number, often followed by one or two letters representing subcategories, followed by further numerical identification for each unique image. Phyically, materials are housed by format, with all prints together (Boxes 47-55), followed by glass plate negatives (Boxes 56-61), then safety film negatives (Boxes 61-62). Nitrate negatives were scanned and discarded, so exist only digitally, though some sample envelopes were saved (Box 46). Images in any given category could be in multiple formats, as specified below.
Some of the categorized subjects include dams and dam failures, flumes, snow surveys, machinery, and well drilling. There are also images taken at the Hydraulics Laboratory on the campus of the Colorado Agricultural College (now Colorado State University) and at the Bellvue laboratory on the Cache la Poudre River. Images were captured by many different individuals, including Carl Rohwer, Victor M. Cone, William E. Code, and Ralph Parshall, although most do not have an identified photographer and some were sent from other institutions. Although the majority of the photographs do not have identified locations, the geographical scope includes Colorado, Wyoming, South Dakota, North Dakota, Nebraska, Idaho, Arizona, New Mexico, and California. Beyond the categorization system, the series ends with a set of 1903 glass plate negatives of a seepage measurement trip in the Cache la Poudre River canyon and a set of about 700 snow pictures, most undated and unidentified, but some being from the Poudre Basin. A separate item-level inventory of the series can be provided on request.
Box Folder
700: Structures.
700A: Dams.
47 1 700Aa: Views. 1933, 1953, undated. prints, glass plate negatives (Box 56), nitrate negatives, safety negatives (Box 62)
47 2 700Ae: Protection. undated. print, glass plate negative (Box 56)
56 10-17 700Ag: Failures. undated. glass plate negatives
47 3 700Ah: Slope pavement. undated. prints, glass plate negatives (Box 56), nitrate negatives
47 4 700B: Headgates. undated. prints
47 5 700Ba: General views. undated. prints, glass plate negatives (Box 56), nitrate negatives, safety negatives (Box 62)
47 6 700Bb: Structures. 1941, 1943, undated. prints, glass plate negatives (Box 56), nitrate negatives, safety negatives (Box 62)
47 7 700Bd: Lifting devices. undated. print, glass plate negatives (Box 56)
56 43-44 700Bf: Drift guard. undated. glass plate negatives
47 8 700C: Sandgates and sluiceways. 1955, undated. prints, glass plate negatives (Box 56), nitrate negatives, safety negatives (Box 62)
47 9 700D: Wasteways, spillways, etc. undated. prints, nitrate negatives
47 10 700E: Chutes. undated. prints, glass plate negatives (Box 56), nitrate negatives
47 11 700F: Drops. 1953-1954, undated. prints, glass plate negatives (Box 56), nitrate negatives, safety negatives (Box 62)
47 12 700G: Siphons. undated. prints, glass plate negatives (Box 56), nitrate negatives
47 13 700H: Flumes. 1938-1953, undated. prints, glass plate negatives (Box 56), nitrate negatives, safety negatives (Box 62)
48 1 700I: Diversion works. undated. prints, glass plate negatives (Box 57), nitrate negatives
48 2 700J: Lateral gates and turnouts. 1916-1952, undated. prints, nitrate negatives, safety negatives (Box 62)
48 3 700K: Checks and turnouts. 1940, 1952, undated. prints, glass plate negatives (Box 57), nitrate negatives, safety negatives (Box 62)
700L: Pipes and pipe lines.
48 4 700La: Wood-stave. undated. prints, glass plate negatives (Box 57)
48 5 700Lb: Concrete. undated. prints, nitrate negatives, safety negatives (Box 62)
48 6 700Le: Appliances - air chambers. undated. prints, safety negatives (Box 62)
48 7 700M: Measuring. undated. prints
48 8 700Ma: Flumes. 1920, undated. prints, glass plate negatives (Box 57), nitrate negatives, safety negatives (Box 62)
48 9 700Mb: Weirs. undated. prints, glass plate negatives (Box 57 and 61), nitrate negatives
48 10 700Mc: Division boxes. undated. prints, glass plate negatives (Box 57), nitrate negatives
48 11 700Mf: Miscellaneous. undated. prints, safety negatives (Box 62)
48 12 700Mg: Meters and stations. 1912, 1916, undated. prints
48 13 700Mh: Orifice in pipe. 1947. prints, nitrate negatives
48 14 700Mk: [Ditch]. undated. print, glass plate negative (Box 57)
48 15 700O: Retaining walls. undated. prints, nitrate negatives
48 16 700P: Reservoir outlets. 1940, undated. prints, glass plate negatives (Box 57), nitrate negatives
48 17 700R: Sand traps. 1953, undated. prints, safety negatives (Box 62)
48 18 700S: Trash racks. undated. prints, safety negatives (Box 62)
48 19 700Z: Miscellaneous. 1940, undated. prints, nitrate negatives
57 59-61 705A-705B: [Farms]. undated. glass plate negatives
49 1 710: Canals. 1938-1952, undated. prints, nitrate negatives, safety negatives (Box 62)
49 2 710A: Unlined canals. undated. prints, glass plate negatives (Box 57), nitrate negatives
49 3 710Aa: Aquatic growth. undated. prints, glass plate negatives (Box 57), nitrate negatives
49 4 710Ac: Construction. 1951. prints, nitrate negatives
49 5 710Ad: Seepage from. 1946. prints, nitrate negatives
710B: Lined canals.
49 6 710Ba: Concrete lined views, construction, seepage. 1944-1953, undated. prints, glass plate negatives (Box 57), nitrate negatives, safety negatives (Box 62)
49 7 710Bc: Failures. undated. prints, nitrate negatives
49 8 710Bd: Cotton-asphalt, asphalt. 1953. prints, nitrate negatives
49 9 710Be: Cotton-tar, Bentonite. 1929, undated. prints, nitrate negatives, safety negatives (Box 62)
62 216 710Ca: Construction equipment. undated. safety negatives
49 10 710D: Cleaning. undated. prints, safety negatives (Box 62)
58 1-3 710E: Bank protection. undated. glass plate negatives
49 11 710F: Seepage and drainage. undated. prints, glass plate negatives (Box 58), nitrate negatives
49 12 710G: Flow in canals. undated. prints, nitrate negatives
49 13 710Z: General. undated. prints, nitrate negatives
720: Reservoirs.
0 720B: Small concrete reservoirs. undated. nitrate negatives
49 14 720C: General views. 1940, undated. prints, nitrate negatives
725: Underground storage.
0 725A: Geophysical exploration. undated. nitrate negatives
49 15 725B: Landscapes. 1929. prints, nitrate negatives
49 16 725C: Laboratory experiments on material. 1931-1932. prints, nitrate negatives
49 17 725E: Water table fluctuations. 1953. prints, safety negatives (Box 62)
49 18 725F: Investigations. 1942-1944, undated. prints, nitrate negatives, safety negatives (Box 62)
730: Pumping.
49 19 730A: General views. 1928, undated. prints, glass plate negatives (Box 58), nitrate negatives
0 730B: Pumps and other pumping elevators. undated. nitrate negatives
49 20 730Ba: Pumps and pumping plants. 1929-1954, undated. prints, nitrate negatives, safety negatives (Box 62)
49 21 730Bc: Current wheels. 1930. prints, nitrate negatives
49 22 730Bd: Equipment. 1929. prints, nitrate negative
49 23 730Be: Pump testing - students. 1929-1949, undated. prints, nitrate negatives, safety negatives (Box 62)
49 24 730Bf: Elevators. 1933, undated. prints, nitrate negative
730C: Power.
49 25 730Cb: Engines and motors. 1939, undated. prints, nitrate negatives
49 26 730D: Field laboratory work. 1929-1932, undated. prints, nitrate negatives
730Z: Miscellaneous.
49 27 730Za: Air chambers. 1941. prints
735: Wells and well drilling.
50 1 735A: Wells for irrigation. 1932-1939, undated. prints, nitrate negatives
50 2 735Aa: Screens - gravel envelopes. 1926-1941, undated. prints, nitrate negatives
50 3 735Ab: Development. 1931-1934, undated. prints, nitrate negatives
50 4 735Ac: Well failures. 1930-1931, undated. prints, nitrate negatives
50 5 735Ad: Well testing. 1929-1930, undated. prints, nitrate negatives
50 6 735Ae: General - pit wells. undated. prints, nitrate negatives
50 6 735Af: [Trench well]. undated. prints, nitrate negatives
50 7 735B: Well drilling and equipment. 1929-1947, undated. prints, nitrate negatives, safety negatives (Box 62)
50 8 735Ba: Water. 1941-1949, undated. prints, nitrate negatives, safety negatives (Box 62)
50 9 735Bb: Oil. 1931, undated. prints, nitrate negatives
740: Preparing land for irrigation.
50 10 740C: Levelling. 1941-1954, undated. prints, nitrate negatives, safety negatives (Box 62)
740E: Furrowing, borders, etc.
50 11 740Ea: Implements - ditchers. 1951-1952, undated. prints, nitrate negatives, safety negatives (Box 62)
750: Applying water.
50 12 750A: Equipment. 1948-1950, undated. prints, glass plate negatives (Box 58), nitrate negatives, safety negatives (Box 62)
50 13 750B: Flooding. 1927-1928, 1952, undated. prints, glass plate negatives (Box 61), nitrate negatives, safety negatives (Box 62)
50 14 750C: Furrows. 1948-1953, undated. prints, glass plate negatives (Box 58), nitrate negatives, safety negatives (Box 62)
50 15 750E: Spray. 1947-1953, undated. prints, nitrate negatives, safety negatives (Box 62)
50 16 750F: Subirrigation. 1952. prints, safety negatives (Box 62)
51 1 750H: Experiments and research. 1945, undated. prints
760: Crops.
51 2 760A: General views. 1909, undated. prints, glass plate negatives (Box 58), safety negatives (Box 62)
51 3 760B: Experimental results. 1924, undated. prints, nitrate negatives, safety negatives (Box 62)
765: Soils.
765A: Water-holding capacity.
51 4 765Aa: Erosion. 1925-1934, undated. prints, nitrate negatives
51 5 765B: Moisture conservation. 1934. prints, nitrate negatives
51 6 780: Experimental equipment. undated. prints, safety negatives (Box 62)
51 6 780A: Seepage. undated. prints, glass plate negatives (Box 58), nitrate negatives
51 7 780Af: Bulletin illustrations. undated. prints, nitrate negatives, safety negatives (Box 62)
51 8 780B: Drainage. undated. prints, glass plate negatives (Box 58), nitrate negatives
51 9 780C: Laboratory. 1910-1911, 1944, undated. prints, glass plate negatives (Box 58), nitrate negatives
51 10 780Ca: Weirs. 1926, undated. prints, glass plate negatives (Box 58), nitrate negatives
51 11 780Cb: Orifices. undated. prints, glass plate negatives (Box 59), nitrate negatives
51 12 780Cc: Tubes. undated. prints, nitrate negatives
51 13 780Cf: Registering flow meters. 1915, undated. prints, glass plate negatives (Box 59), nitrate negatives
51 14 780Cg: Pipe, valves and fittings. 1940-1942, undated. prints, nitrate negatives, safety negatives (Box 62)
51 15 780Ch: Water-stage recording and integrating instruments. 1928-1936, undated. prints, glass plate negatives (Box 59), nitrate negatives
51 16 780Ci: Evaporation. 1925-1931, undated. prints, glass plate negatives (Box 59), nitrate negatives, safety negatives (Box 62)
59 63-66 780Cj: Siphons. undated. glass plate negatives (Box 59)
51 17 780Ck: Spillways. undated. prints, nitrate negatives
51 18 780Cm: Silt sampler. 1929. prints, nitrate negatives, safety negatives (Box 62)
52 1 780Cn: Transition of flow. 1925, undated. prints, glass plate negatives (Box 59)
0 780Cp: Energy dissipation. undated. nitrate negatives
52 2 780Cq: Sand traps. 1932-1948, undated. prints, nitrate negatives, safety negatives (Box 62)
52 3 780Cr: El Centro silt laboratory. 1934, undated. prints, nitrate negatives
52 4 780Cs: Sand separator. undated. prints
52 5 780Cz: Miscellaneous. undated. prints, glass plate negatives (Box 59), nitrate negatives, safety negatives (Box 62)
59 70 780D: Pumping. undated. print, glass plate negative
52 6 780Da: Well screens and gravel packs. 1948, undated. prints, safety negatives (Box 62)
52 7 780E: Current meters and pitot tubes. 1920, 1935, undated. prints, glass plate negatives (Box 59 and 60), nitrate negatives, safety negatives (Box 62)
780F: Venturi flume.
52 8 780Fa: Laboratory. 1915, undated. prints, glass plate negatives (Box 60), nitrate negatives, safety negatives (Box 62)
52 9 780Fb: Field (Bellvue Lab) General views. 1919-1920, 1954, undated. prints, glass plate negatives (Box 60 and 61), nitrate negatives, safety negatives (Box 62)
52 10 780Fc: Parshall measuring flume. 1927-1952, undated. prints, nitrate negatives, safety negatives (Box 62)
53 1 780Fs: [Equipment]. 1945. prints, safety negatives (Box 62)
53 2 780G: Models. 1935, undated. prints, glass plate negatives (Box 61), nitrate negatives, safety negatives (Box 62)
53 3 780H: Adjustable tube orifice meter. 1928-1952, undated. prints, glass plate negatives (Box 61), nitrate negatives, safety negatives (Box 62)
53 4 780Ma: [Streams]. undated. prints, nitrate negatives
53 5 780Z: Miscellaneous. 1914-1948, undated. prints, glass plate negatives (Box 61), nitrate negatives
785: General views.
53 6 785A: Rivers, streams, etc. 1910-1956, undated. prints, nitrate negatives, safety negatives (Box 62)
790: Diagrams, tables, charts, maps, plans, etc.
53 7 790A: [Equipment, map, outdoor scenes]. undated. prints, nitrate negatives, safety negatives (Box 61)
795: Drainage of irrigated land.
53 8 795A: Lands needing drainage. 1916, undated. prints, nitrate negatives
53 9 795B: Construction. 1924, 1952, undated. prints, nitrate negatives
53 10 795C: Implements and machinery. undated. prints, nitrate negatives
0 795F: Machinery. undated. nitrate negatives
53 11 795G: Pumping. 1951, undated. prints, nitrate negatives
53 12 800: Snow surveys. undated. prints
53 13 800A: Equipment. undated. prints, safety negatives (Box 61)
53 14 800B: Snow courses. 1939-1943, undated. prints, nitrate negatives, safety negatives (Box 61)
54 1 800Ba: [Wyoming]. 1939-1943, undated. prints, nitrate negatives
54 2 800Bb: [Arizona]. 1940, undated. prints, nitrate negatives, safety negatives (Box 61)
54 3 800Bc: [New Mexico]. 1939-1941, undated. prints, nitrate negatives
0 800Bd: [South Dakota]. undated. nitrate negatives
54 4 800E: General snow scenes, shelter cabins, etc. 1938, undated. prints, nitrate negatives
54 5 805: Meteorology. 1932-1939, undated. prints, nitrate negatives, safety negatives (Box 61)
54 6 850: Miscellaneous, views, celebrations, demonstrations, etc. 1911-1951, undated. prints, glass plate negatives (Box 61), nitrate negatives, safety negatives (Box 61)
61 16-34 Poudre River seepage trip. 1903. glass plate negatives
55 1-8 Snow pictures. 1904-1906, undated. prints, nitrate negatives
Most photos taken in the Cache la Poudre or Laramie river basins. For additional caption information, see 2 albums in Box 61.