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  80001: Two men surveying for the Federal-State Cooperative Snow Surveys, Division of Irrigation, Soil Conservation Service, USDA 

  Author(s):James, J. G.; United States. Soil Conservation Service. Division of Irrigation
  Date:undated

  Stamp on back reads: "Official photograph. When used for publication credit J. G. James for Soil Conservation Service, USDA"
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  785A62: "Cutting spelt" 

  Author(s):Unknown
  Date:undated
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  750C01: "Furrow irrigation at Rockyford" 

  Author(s):United States. Department of Agriculture
  Date:undated
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  780Fc12303: "Forest Service test of five foot Parshall flume" 

  Author(s):Unknown
  Date:1935-03-28

  Rest of caption reads: "General view of layout from lower end. Flume with 5 per cent sloping floor in foreground. With level floor in middle distance. San Dimas concrete dam in back-ground. San Dimas, California. Photo by Young."
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  750H01: "Irrigation practices investigation - J.H. Gahart Ranch" 

  Author(s):Rouse, Hayden K.
  Date:1945-06-18

  Rest of caption reads: "General view of experimental area, looking north from point near center of southern end of the plot. At extreme far end in center is the stilling well of the water level recorded. The four distributing ...
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  700H4104: Ralph Parshall next to Parshall measuring flume 

  Author(s):Unknown
  Date:undated

  Sign reading "ARMCO Parshall Measuring Flume" next to Parshall
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  700J01: "Divisor in lateral S.E. of Fort Collins, Colorado" 

  Author(s):Unknown
  Date:1916

  Rest of caption reads: "Showing poor design and operation, but a rather typical installation."
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  S2053: Beaver-chewed tree trunk 

  Author(s):Unknown
  Date:1904
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  S6032: "No. 2. E. W. Johnsons flume on Grace Creek" 

  Author(s):Unknown
  Date:1904-05

  Man sitting on side of wooden flume
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  S2005: Group of adults and children with skis and snowshoes 

  Author(s):Unknown
  Date:1904
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  700H11a: "Timber flume, Orchard Mesa Power Canal, Palisade" 

  Author(s):Unknown
  Date:1914?

  Title information from "Frictional Resistance in Artificial Waterways" by V. M. Cone, R. E. Trimble, and P. S. Jones, 1914
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  8050103: Ralph Parshall and three other men with U.S.D.A. equipment 

  Author(s):Unknown
  Date:1932?-1933?

  Ralph Parshall at left with three unidentified men and camera equipment in front of an automobile next to CSU's Civil Engineering Building
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  S2001: Snow-covered mountaintops 

  Author(s):Unknown
  Date:1904
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  80006: Three men surveying for the Federal-State Cooperative Snow Surveys, Division of Irrigation, Soil Conservation Service, USDA 

  Author(s):Unknown
  Date:undated
• 

  850202802: Men at ditch demonstration 

  Author(s):Unknown
  Date:undated

  Group of men on both sides of vortex tube sand trap in Jackson Ditch at Bellvue Hydraulic Laboratory
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  8050102: Two men standing proudly 

  Author(s):Unknown
  Date:undated
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  700Bb01: "Combined check gate and lateral headgate, Kicking Bird Canal" 

  Author(s):Unknown
  Date:undated

  One man standing on structure and another standing beside it
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  80002: Two men surveying for the Federal-State Cooperative Snow Surveys, Division of Irrigation, Soil Conservation Service, USDA 

  Author(s):Unknown
  Date:undated
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  800A02: Sign: "Federal-State Cooperative Snow Surveys. Snow-Survey Shelter. Do Not Molest." 

  Author(s):Unknown
  Date:undated

  Sign further reads, "Travelers! This shelter is essential to the safety of snow surveyors who use it during the snow season. United States Department of Agriculture, Soil Conservation Service, Division of Irrigation."
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  800B05: Tree stumps on cleared mountainside 

  Author(s):Unknown
  Date:1940

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