The Coast Guard approved Governor Jindal's 'dredging' plan Thursday.
The move will cost $350 million and involves building sand walls along the Louisiana coast to keep crude from creeping into the marsh.
A lot is riding on British Petroleum as crews work to carry out the 'top kill' maneuver.
The technique involves shooting thousands of pounds of heavy mud into a five-story stack of pipes to clog the well.
The feds and BP continue to clash on how to handle cleanup efforts.
Last week, the Environmental Protection Agency told British Petroleum to stop dumping a chemical dispersant into the water, calling it a health hazard.