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The Morganza Spillway Is Now Open

The Pointe Coupee Banner | Corps directed to open Morganza Spillway

The Morganza Spillway has been opened to protect Baton Rouge and New Orleans from the Mississippi River potentially overflowing its carefully-carved banks in these cities. According to Tim, this does not keep New Orleans river levels from subsiding, but stabilizes the flow rate downstream from the spillway. “Operation of [the] spillway and floodway will keep [river] stage from going above 17 [feet] at [the] Carrollton [gage].”

The US Army Corps of Engineers designed the spillway to be opened “when the flow of the Mississippi at Red River Landing, Louisiana, is greater than 1,500,000 cu ft/s (42,000 m3/s) and rising.” With 125 bays, that’s 12,000 cfs per bay. As of this writing, one Morganza bay is open. More from Tim: “The spillways operate to maintain 1.5 million cfs flow at Baton Rouge and 1.25 million cfs at New Orleans. Doing the math, 0.25 M cfs flows out [of the] Bonnet Carre [spillway].”

WWLTV New Orleans reports that the spillway may be open for several weeks.

My heart is with you, Acadiana.



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