Shows benefited area, flood and drainage control, and channel installation. "February 1981 4-R-36718. Revised February 1981 Base 4-R-21438." "Base compiled from Mosaic 4-R-21437 and county highway maps." Includes location map. Available also through the Library of Congress Web site as a raster image.
United States. Soil Conservation Service
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/85693526/">https://www.loc.gov/item/85693526/</a>