Trees grow on the levee where I-80 crosses the Sacramento River August 25, 2011 in Sacramento, Calif.
A new research report by the U.S. Army Corps of Engineers appears to disprove its own policy banning trees on levees. The study not yet publicly released, concludes that trees located on the lower third of a levee can actually strengthen a levee and improve flood protection. The Corps has maintained since Hurricane Katrina that trees are dangerous because roots could provide a path for seepage that could undermine a levee. The new study disproves that, and could force the Corps to reconsider a controversial policy that would eliminate millions of trees in the Central Valley.
Trees grow on the levee where I-80 crosses the Sacramento River August 25, 2011 in Sacramento, Calif.
A new research report by the U.S. Army Corps of Engineers appears to disprove its own policy banning trees on levees. The study not yet publicly released, concludes that trees located on the lower third of a levee can actually strengthen a levee and improve flood protection. The Corps has maintained since Hurricane Katrina that trees are dangerous because roots could provide a path for seepage that could undermine a levee. The new study disproves that, and could force the Corps to reconsider a controversial policy that would eliminate millions of trees in the Central Valley.
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