There are no access restrictions on this collection.
Not all of the material in the collection is in the public domain.
Researchers are responsible for addressing copyright issues.
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 today. 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 in
1904. During the summers of 1906 and 1907 he pursued graduate work at the
University of Chicago. At the 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
the snow pack 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 United States 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
the Colorado Agricultural College and 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 the Colorado State
College at 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.
The Ralph L. Parshall Collection consists of documents dated 1902 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 KAO radio in Denver, 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 Irrigation Investigation Section of the U.S. Dept.
of Agriculture in 1914. The collection also contains some files from Maxwell
Parshall, who began at the Colorado State College at Fort Collins in 1937,
serving with the Civil Engineering Department and for a number of years heading
the weather station. The Maxwell Parshall materials include correspondence, a
tape and transcript of the tape.
Ralph L. Parshall Collection, Water Resources Archive, Colorado State
University.
The Ralph L. Parshall Collection was acquired from various sources
over time, with the most recent addition received from Robert Ward on July 23,
2003. This included books, certificates, letters, photographs, and slides.
The processing of the collection was completed in February 2005.
Materials were placed in acid-free folders and metal fasteners 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 III 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 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.
Groundwater Data Collection, Water Resources Archive, Colorado State
University.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Series I: Papers
|
|
Box
|
Folder
|
| 1 |
1 |
Alumni Association Banquet and Ball
invitation. 1913. 1p. |
| 1 |
2 |
Alumni Association certificates. 1954. 2pp. |
| 1 |
3 |
Burgess-Manning - Parshall correspendence. 1959. 6pp. |
| 1 |
4 |
Certificate of Fellowship in American Association for
the Advancement of Science. 1923. 2pp. |
| 1 |
5 |
Civil Service application. 1913. 4pp. |
| 1 |
6 |
Colorado Engineering Council award. 1949-1950. 16pp. |
| 1 |
7 |
Electrical precipitator. 1957. 6pp. |
| 1 |
8 |
Headgate award. 1958. 1p. |
| 1 |
9 |
Historical information on Max Parshall and Hunter
Rouse. 1976-1985. e140pp. |
| 1 |
10 |
KOA rado talks. 1931-1935. e50pp. |
| 1 |
11 |
Letters of membership acceptance in ASCE. 1913. 6pp. |
| 1 |
12 |
Letters on occasion of Parshall's retirement. 1948. 7pp |
| 1 |
13 |
Maxwell Parshall. 1956-1963. e50pp. |
| 1 |
14 |
Membership cards. 1920-1959. 6pp. |
| 1 |
15 |
Notes concerning current meters. c.1920. e50pp. |
| 1 |
16 |
Palmer-Bolus flume. 1953. 10pp. |
| 1 |
17 |
Parshall, Ralph L. Siphonic sand trap. 1955. 12pp. |
| 1 |
18 |
Parshall, Ralph L. Water problem. Talk before Rotary
Club. 1956 August 19. 9pp. |
| 1 |
19 |
Parshall, Ralph L. Water stage recording
instruments. 1923. 31pp. |
| 1 |
20 |
Parshall and Carl Rohwer information. 1982. 7pp. |
| 1 |
21 |
Parshall flume. 1959-1975. e40pp. |
| 1 |
22 |
Parshall flume [exhibit]. 1992. 7pp. |
| 1 |
23 |
Parshall miscellaneous documents. 1914-1985. e40pp. |
| 1 |
24 |
Professional bibliography R.L. Parshall. [General
overview of his work]. 1958. 11pp. |
| 1 |
25 |
Quotations. n.d.. 7pp. |
| 1 |
26 |
Rohwer/Blaney evapo-transpiration
correspondence. 1953. 9pp. |
| 1 |
27 |
Rohwer well screen correspondence. 1947-1954. e80pp. |
| 1 |
28 |
Speech and note from G. H. Palmes on
Parshall. 1949. 5pp. |
| 1 |
29 |
U.S. Department of Agriculture service award. 1948. 12pp. |
| 1 |
30 |
Venturi flume water stage recording instruments, patent
no. 1417941. 1922. 11pp. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Series II: Publications
|
|
Box
|
Folder
|
|
|
|
Subseries A: Publications by Parshall. |
| 2 |
1 |
|
Parshall, Ralph L. The improved Venturi flume. Fort
Collins, Colo.: Colorado Experiment Station, Colorado Agricultural College.
Bulletin 336. 1928 March. 83pp. |
| 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. |
| 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. |
| 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. |
| 2 |
12 |
|
Parshall, Ralph L. and Carl Rowher. Venturi flume.
Fort Collins, Colo.: Agricultural Experiment Station, Colorado Agricultural
College. Bulletin 265. 1921 February. 28pp. |
|
|
|
Subseries B: Publications by others. |
| 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. |
| 2 |
14 |
|
Burnham improved submerged orifice water measuring
device. Denver, Colo.: Hardesty Mfg. Co. Circular F-4. 1921. 29pp. |
| 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. |
| 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. |
| 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. |
| 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. 1079pp. |
| 2 |
23 |
|
Venturi irrigation meter. Providence, R.I.: Builders
Iron Foundry . n.d.. 12pp. |
| 2 |
24 |
|
Venturi irrigation meter. Providence, R.I.: Builders
Iron Foundry. 1914. 22pp. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Series III: Visual and audio materials
|
|
Box
|
Folder
|
|
|
|
Subseries A: Photographic materials. |
| 2 |
25 |
|
Parshall--Measuring water in irrigation
channel. 1932. 1 negative |
| 2 |
26 |
|
Portrait of Parshall. 1942. 1 copy negative |
| 2 |
27 |
|
Parshall, Washisngton DC. 1948. 1 photograph |
| 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 |
| 2 |
30 |
|
John R. Freeman. n.d.. 6 portraits on 1 sheet |
|
|
|
|
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. Mud skid dredge.
Dup.". |
| 3 |
2 |
|
|
Two men, 2 horses. |
| 3 |
3 |
|
|
Canal. Horse. |
| 3 |
4 |
|
|
Graph. "Free flow discharge curve". |
| 3 |
5 |
|
|
Water flow structure (possibly weir). |
| 3 |
6 |
|
|
Measuring device. Top left corner cracked |
| 3 |
7 |
|
|
Water flow structure (possibly weir). Top left corner cracked |
| 3 |
8 |
|
|
Flume. |
| 3 |
9 |
|
|
Flume/weir. |
| 3 |
10 |
|
|
Flume. |
| 3 |
11 |
|
|
Measuring device. |
| 3 |
12 |
|
|
Flume under construction. |
| 3 |
13 |
|
|
Graph. "Comparison based on 100 laboratory tests"
. |
| 3 |
14 |
|
|
Water flow structure. |
| 3 |
15 |
|
|
Map of Northern Colorado. "7". |
| 3 |
16 |
|
|
Map of Northern Colorado. "6". |
| 3 |
17 |
|
|
Map of Northern Colorado. "5". |
| 3 |
18 |
|
|
Map of Northern Colorado. "4" Legend: Windsor
Reservoir, Windsor Lake. |
| 3 |
19 |
|
|
Map of Northern Colorado. "3". |
| 3 |
20 |
|
|
Map of northern Colorado. "2" Legend: Direct flow,
direct flow and storage. |
| 3 |
21 |
|
|
Map of northern Colorado. "1". |
| 3 |
22 |
|
|
"Gasberg flume. Modesto. To be replaced by hydraulic
fill". |
| 3 |
23 |
|
|
Ditch/weir. Top right corner cracked |
| 3 |
24 |
|
|
"Irrigating citrus orchard by 4 deep furrows.
Dup.". |
| 3 |
25 |
|
|
Field. |
| 3 |
|
|
|
|
|
|
|
26 lantern slides: original container labeled "#1" |
| 3 |
26 |
|
|
Ditch/flume. |
| 3 |
27 |
|
|
Dam. |
| 3 |
28 |
|
|
Measuring device. |
| 3 |
29 |
|
|
Measuring device. |
| 3 |
30 |
|
|
Measuring device. |
| 3 |
31 |
|
|
Measuring device. |
| 3 |
32 |
|
|
Measuring device. |
| 3 |
33 |
|
|
Graph. "South Reservation Ditch on July 19,
1920". |
| 3 |
34 |
|
|
Drawing. "One foot improved Venturi flume. Nov.
1924". |
| 3 |
35 |
|
|
Water flow structure, man. |
|
|
|
|
|
(Large headgates on the Rio Grande Canal--from Parshall's
Irrigation in Colorado, p.5) |
| 3 |
36 |
|
|
Stream/river. |
|
|
|
|
|
(Headwaters of the Cache La Poudre River--from Parshall's
Irrigation in Colorado, p.4) |
| 3 |
37 |
|
|
Snow/mountains. |
|
|
|
|
|
(Snow on Continental Divide--on cover of Parshall's
Irrigation in Colorado) |
| 3 |
38 |
|
|
Flume. |
| 3 |
39 |
|
|
Flume. |
| 3 |
40 |
|
|
Flume. |
| 3 |
41 |
|
|
Flume. |
| 3 |
42 |
|
|
River/stream flowing over weir. |
| 3 |
43 |
|
|
River/stream, buildings. Irrigation Investigation
area. |
| 3 |
44 |
|
|
Building: Irrigation Investigation, Colorado
Experiment Station/USDA. |
| 3 |
45 |
|
|
Drawing of flume. Upper left corner cracked |
| 3 |
46 |
|
|
Flume. |
| 3 |
47 |
|
|
Wood structure, perhaps flume. |
| 3 |
48 |
|
|
Wood structure, perhaps flume. |
| 4 |
49 |
|
|
Flume structure, in building. |
| 3 |
50 |
|
|
Scene including Irrigation Investigation
building. Cracked across top |
| 3 |
51 |
|
|
Scene including Irrigation Investigation building
(different view than #50). |
| 3 |
|
|
|
|
|
|
|
24 lantern slides: original container labeled "sand traps"
(Parshall's writing) |
| 3 |
52 |
|
|
Sand trap, dog, buildings. |
| 3 |
53 |
|
|
Structure, possibly sand trap. |
| 3 |
54 |
|
|
Structure, possibly sand trap. |
| 3 |
55 |
|
|
"Cross section of tube". |
| 3 |
56 |
|
|
River/stream. Water flow structure. Four men on
structure. |
| 3 |
57 |
|
|
Same structure, different view. Three men on
structure. |
| 3 |
58 |
|
|
Same structure, different view. |
| 3 |
59 |
|
|
Man lifting piece of structure. |
| 3 |
60 |
|
|
Structure under construction. |
| 4 |
61 |
|
|
Drawing. "Riffle deflector-vortex tube sand trap and
40-foot Parshall measuring flume". Tape loose on slide |
| 4 |
62 |
|
|
Structure. |
| 4 |
63 |
|
|
Sand trap. |
| 4 |
64 |
|
|
Drawing. Sand trap. |
| 4 |
65 |
|
|
Sand trap. |
| 4 |
66 |
|
|
Sand trap. |
| 4 |
67 |
|
|
Sand trap. |
| 4 |
68 |
|
|
Sand trap. |
| 4 |
69 |
|
|
Flowinig river/ditch and structure. |
| 4 |
70 |
|
|
Water flowing through structure. |
| 4 |
71 |
|
|
Water flowing through structure. |
| 4 |
72 |
|
|
Ditch, structure, building. |
| 4 |
73 |
|
|
Water, structure. |
| 4 |
74 |
|
|
Water flow. Tape loose on slide |
| 4 |
75 |
|
|
Water, structure. |
| 4 |
|
|
|
|
|
|
|
7 lantern slides from unlabeled container |
| 4 |
76 |
|
|
Graph. "Dolores River at Gateway. Fig.
1". |
| 4 |
77 |
|
|
Graph. "Dolores River at Gateway. Fig.
2". |
| 4 |
78 |
|
|
Graph. "Arkansas River at Salida. Fig.
3". |
| 4 |
79 |
|
|
Graph. "Arkansas River at Salida. Fig.
3". Copy 2 |
| 4 |
80 |
|
|
Graph. "Arkansas River at Salida. Fig.
4". |
| 4 |
81 |
|
|
Graph. "San Juan at Pagosa Springs. Fig.
2". |
| 4 |
82 |
|
|
Graph. "San Juan at Pagosa Springs. Fig.
1". |
| 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. |
| 4 |
84 |
|
|
Unknown wheeled cart. |
| 4 |
85 |
|
|
"Plan of apparatus evapo-transpiration
study". |
| 4 |
86 |
|
|
"Mariotte feed to supply evapo-transpiration loss
from tanks. Jan. 1932". |
| 4 |
87 |
|
|
Graph. "Trend of evapo-transpiration losses from
various crops by weeks. 1932". |
| 4 |
88 |
|
|
Graph. "Trends of evapo-transpiration losses from
various crops by weeks. 1931". |
| 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 B: Other materials. |
| 7 |
|
|
Measuring snow. 1937-early 1940s. 1 16 mm. film, c.30 min. |
|
|
|
|
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. 1 cassette tape |
