Cutaway cross-section of the spillway at Bonneville Dam with tainter gates and flip lip.
U.S. Army Corps of Engineers, artist not specified
not specified
U.S. Army Corp of Engineers Digital Visual Library<br><a rel="nofollow" class="external text" href="http://images.usace.army.mil/Main.html">Digital Visual Library home page</a><br><a rel="nofollow" class="external text" href="http://images.usace.army.mil/images/Graphiclib/G-Tiffs/nwpIL-08.tif">Image page</a> (large TIFF, 6.3 Mb)<br><a rel="nofollow" class="external text" href="http://images.usace.army.mil/scripts/PortWeb.dll?query&amp;field=Filename&amp;opt=matches&amp;value=NWPIL-08.GIF&amp;template=Selected_Info&amp;catalog=graphicDVL">Image description page</a><br> Source TIFF file saved as PNG.