Previously on HN: America's Achilles' heel: the Mississippi River's Old River Control Structure (https://news.ycombinator.com/item?id=2547928 https://news.ycom

Previously on HN: America's Achilles' heel: the Mississippi River's Old River Control Structure (https://news.ycombinator.com/item?id=2547928 https://news.ycombinator.com/item?id=2547928) (12 comments) Relevant Wikipedia article: https://en.wikipedia.org/wiki/Old_River_Control_Structure https://en.wikipedia.org/wiki/Old_River_Control_Structure