Old River Control Structure of 1973 almost caused the control structure to fail. Integrity of the Old River Control Structure, the nearby Morganza Spillway, and other levees in the area is essential to prevent such a diversion. Jeff Masters of "Weather Underground" noted that failure of that complex "would be a serious blow to the U.S. economy." The present Old River Control Structure was completed in 1964 and expanded in 1990. The first two floodgates are the Low Sill Control Structure, which regulates routine flow in the waterway, and the Overbank Control Structure, in use only when the Mississippi exceeds its banks. A navigation
Morganza, Maryland Morganza, Maryland Morganza is an unincorporated community in St. Mary's County, Maryland, United States. Today, it is home to a few homes and St. Joseph's Catholic Church, which had been in the area since 1759. The current church on Route 5 at the top of the hill was built in 1860 and the Morganza Post Office was established there in 1867, named after the Morgan family. The post office is now located across from Chopticon High School. Morganza was home to two public one-room school houses and the church opened a parochial school for white students in 1926 and for