Road Structure 4 miles north of Sioux City, Iowa in Plymouth County. This photo shows a 36 inch corrugated metal pipe laid before covering on a county farmer (G. Fry) cooperative road structure. At the double elbow section to the left is where the downstream berm will be located. The structure has a slotted flume outlet. This structure has a drop of 58' from inlet to outlet of flume. Approximately 2/3 of the 65,000 cubic yards of fill are in place Ducommun, W - Photographer 1964-06-12 Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).<a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en"> http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Io-558-4 Robert Kelker Parallel Broadbase ten State Library of Iowa 1979 Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).<a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en"> http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Ron Fischer parallet grassback terraces <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=49&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Terracing">Terracing</a> State Library of Iowa 1979 Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). <a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en">http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Rows of Small Pine Trees with Hedges near by <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=49&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Pine+trees%3B">Pine trees;</a> State Library of Iowa Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).<a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en"> http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Seeded backslope terraces on the property of William Zemanek, Section 11 - Sioux Township #10 <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=49&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Terracing">Terracing</a> Seeded backslope terraces are a very effective pollution control Plymouth county Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). <a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en">http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Seven Standing Men Talking in Field <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=49&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Plymouth+County+Soil+and+Water+Conservation+District%3B%0D%0ASoil+Conservation+-+Iowa%0D%0AWater+Conservation+-+Iowa">Plymouth County Soil and Water Conservation District; Soil Conservation - Iowa Water Conservation - Iowa</a> These men are not identified, but the one in the middle is holding a document.. unknown State Library of Iowa Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).<a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en"> http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Several people standing by two Komatsu Excavators with a smaller farm machine in background <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=49&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Excavators">Excavators</a> State Library of Iowa Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). <a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en">http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Shovel Loader and Bulldozer in Field - John Schnefl <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=49&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Bulldozers">Bulldozers</a> State Library of Iowa Plymouth County Soil and Water Conservation District jpg still image Side view of man giving talk to group of seated young people outside. State Library of Iowa Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). <a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en">http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Side view of property owner Lester Willams examining some native grass. The native grass that is being examined has never been cultivated. Mr. Williams uses good management on his native grass pasture and he has had good rresponse from fertilizing. This property is located 4 miles north of Sioux City, Iowa. Weber, Eldon, Photographer - U.S. Soil Conservation Service Photo State Library of Iowa Plymouth County Soil and Water Conservation District This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).<a title="In Copyright" href="https://rightsstatements.org/page/InC/1.0/?language=en"> http://rightsstatements.org/vocab/InC/1.0/unknown</a> jpg still image Io-266-7