The Corps is proposing to use the fly ash as part of a lime slurry mixture for some kind of grouting to stabilize the levees according to the article. Environmentalists are concerned about the potential impacts of residual toxins in the fly ash. However, they are drawing comparisons to the TVA coal ash dam failure. From my perspective, this is an unfair comparison since this fly ash would be mixed with lime and in theory any toxins would be bound up in the grout matrix. But it never hurts to be cautious regarding potential contaminants that close to such an important waterway. [Source: bnd.com via ASCE SmartBrief]
USACE responds to TIME magazine’s August 13, 2007, cover story, "The Threatening Storm"
WASHINGTON (August 13, 2007) – TIME magazine’s August 13, 2007, cover story, "The Threatening Storm," contains many errors and misrepresentations of facts with respect to the U.S. Army Corps of Engineers, Hurricane Katrina, and ongoing efforts to improve hurricane and storm damage reduction for southeast Louisiana.