Back in 1989, crews fighting the Exxon Valdez tanker spill — which unleashed almost 11 million gallons of oil into Alaska's Prince William Sound — used pressure hoses and rakes to clean the shores. The Gulf Coast is just too fragile for that: those tactics could blast apart the peat-like soils that hold the marshes together.
Hundreds of miles of bayous and man-made canals crisscross the coast's exterior, offering numerous entry points for the crude. Access is difficult and time-intensive, even in the best of circumstances.
"Just the compaction of humanity bringing equipment in, walking on them, will kill them," said David White, a wetlands ecologist from Loyola University in New Orleans.
Marshes offer a vital line of defense against Gulf storms, blunting their fury before they hit populated areas. Louisiana and the federal government have spent hundreds of millions of dollars rebuilding barriers that were wiped out by hurricanes, notably Katrina in 2005.
They also act as nursery grounds for shrimp, crabs, oysters — the backbone of the region's fishing industry. Hundreds of thousands of migratory birds nest in the wetlands' inner reaches, a complex network of bayous, bays and man-made canals.
To keep oil from pushing deep into Louisiana's marshes, Gov. Bobby Jindal and officials from several coastal parishes want permission to erect a $350 million network of sand berms linking the state's barrier islands and headlands.
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