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Either of two new routes - through the Atchafalaya Basin or through Lake Pontchartrain - might become the Mississippi 's main channel if flood-control structures are overtopped or heavily damaged during a severe flood .
 Atchafalaya Basin, Lake Pontchartrain, Mississippi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Atchafalaya Basin, Lake Pontchartrain, Mississippi