Atchafalaya Basin from the Mississippi, Red and Black rivers is diverted into the Atchafalaya at the Old River Control Structure. This flow diverts on average 25 percent of the Mississippi River flow down the Atchafalaya. In times of extreme flooding, the US Army Corps of Engineers may open the Morganza Spillway and other spillways to relieve pressure on levees and control structures along the Mississippi. On May 13, 2011, in the face of a rising Mississippi River that threatened to flood New Orleans and other heavily populated parts of Louisiana, the USACE ordered the Morganza Spillway opened for the first time since
Maryland Route 242 in 1923. The state highway was reconstructed with curve modifications and a bituminous-stabilized gravel surface in the 1950s, beginning with the Morganza–Clements section in 1949 and 1950. MD 242 was rebuilt from Clements to Bushwood by 1959. Maryland Route 242 Maryland Route 242 (MD 242) is a state highway in the U.S. state of Maryland. Known as Colton Point Road, the state highway runs from Coltons Point north to MD 5 in Morganza. MD 242 connects the communities of Morganza, Clements, Bushwood, Avenue, and Coltons Point in western St. Mary's County. The state highway also leads to St. Clement's Island