America's Achilles Heel
May 17, 2019 12:39 PM Subscribe
Rising up from the flat, wooded west flood plain of the Mississippi River are four massive concrete and steel structures that would make a pharaoh envious: the U.S. Army Corps of Engineers’ greatest work, the two billion-dollar Old River Control Structure (ORCS). The ORCS saw its second highest flood on record in March 2019, and flood levels have risen again this week to their fifth highest level on record. While the structure is built to handle the unusual stress this year's floods have subjected it to, there is reason for concern for its long-term survival, since failure of the Old RIver Control Structure would be a catastrophe with global impact.
Failure of the ORCS and the resulting loss of barge shipping that might result could well trigger a global food emergency. The U.S. is one of the world’s largest exporters of grain, and 60% of that grain is transported to market by barges travelling on the Lower Mississippi River. A multi-month interruption in the supplies of more than half of U.S. grain to the rest of the world can be expected to cause a spike in global food prices, and potentially create dangerous food shortages in vulnerable food-insecure nations.Dr. Jeff Masters writes a three-part series on the Old River Control Structure (previously) for Weather Underground: