The massive spillway has 350 gates. Officials are opening 28 of them. They will see how much the river drops before deciding to open more. The water is diverted into Lake Pontchartrain and eventually into the Gulf of Mexico.
Upriver, the Corps has asked for permission to open another spillway near Baton Rouge. That could flood some of Louisiana's most valuable farmland.
Jindal says if the Morganza Spillway is opened, residents in that area could see flooding by the end of the week. An additional 175 guardsmen have been deployed to assist residents.
A decision to open the spillway could come as early as today and Jindal says they'll need up to five days to evacuate those in harms way.
Meanwhile, the governor also urged residents to stay away from the levee as efforts are made to shore it up; he says that oil and gas operators have been notified; he will be requesting a full emergency declaration so the state and individuals can be reimbursed; and the White Castle ferry has been closed.
The Mississippi is expected to crest in New Orleans next week at about 19 feet.
Jindal will travel to several potential impact areas Monday afternoon to meet with emergency officials on preparedness efforts. He will head to Krotz Springs at 1:05 p.m., Breaux Bridge at the Atchafalaya Welcome Center at 2:05 p.m. and Morgan City at the Port Commission Office at 3:20 p.m.
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