Levees are more than meets they eye

Dr. Ken Olson and his Co-author Lois Wright Morton have written a series of articles concerning flooding especially in southern Illinois, Missouri, and Kentucky based on experiences in that areas during the flood of 2011.  Olson and Morton have done  good job of talking about the effects of flooding on soils and agriculture.  In the latest article they explain how Slurry trenches and relief wells are installed to strengthen Ohio and Mississippi river levee systems.  Click on the link to see how there is more than meets the eye when it comes to levees.  The seepage control is an important component of the system, are often not visible at least to the untrained eye.