BP's “top kill” attempt to stop the flow of oil from a ruptured well in the Gulf of Mexico failed, the company's chief operating officer said Saturday. The oil giant has tried for days to stop the the largest oil spill in U.S. history by pumping heavy, mudlike drilling fluid into a ruptured oil well, a method known as “top kill.” The next option is to place a custom-built cap known as the “lower marine riser package” over the leak, the company's chief operating officer, Doug Suttles said. BP crews were working Saturday to ready the materials for that option should it become necessary, he said. “We've been prepping that all along in case we need to move to that option,” he said. “People want to know which technique is going to work, and I don't know.” And if “lower marine riser package” were to fail, he said, BP engineers would try placing a second blowout preventer on top of the first, which failed to cut of the oil flow after the April 20 explosion of the Deepwater Horizon rig. The failed blowout preventer is a 48-foot-tall, 450-ton apparatus that sits atop the well 5,000 feet underwater. Meanwhile, teams in Louisiana were working Saturday on a clean-up project aimed at protecting coastal marshes while BP continues its efforts to stop oil from gushing into the Gulf of Mexico. Plaquemines Parish President Billy Nungesser has said that machines would suck oil out of marshes Saturday after crews determined where to deploy them. Video: Fishermen woes Video: BP CEO pledge: 'Stop the damn leak' Explainer: Stopping the leak RELATED TOPICS Gulf Coast Oil Spill BP plc Louisiana Deepwater Horizon “We will begin to clean up some of those areas that fell by the wayside for the last couple weeks,” he said. Oil giant BP's focus has been trying to put a stop to what officials say is the largest oil spill in U.S. history, with as many as 19,000 barrels of crude gushing into the ocean daily. By Sunday morning the company could know whether the “top kill” procedure — pumping heavy drilling mud into the breached oil well at high pressure — is working, said Robert Dudley, BP's managing director. “It's like an arm-wrestling match of two equally strong forces,” he said. Government scientists on Thursday said as many as 19,000 barrels (798,000 gallons) of oil were spewing into the ocean every day, making this disaster perhaps twice the size of the Exxon Valdez incident. Previously, BP officials and government scientists had said 5,000 barrels (210,000 gallons) of crude were flowing out daily. “This is clearly an environmental catastrophe,” BP CEO Tony Hayward said Friday. “There's no two ways about it.” Under intense political pressure to take control of the situation, President Obama toured the region on Friday. “We want to stop the leak, we want to contain and clean up the oil and we want to help the people in this region return to their lives and livelihoods as soon as possible,” the president told reporters. About 25 percent of the Gulf of Mexico exclusive economic zone has been put off limits, according to the National Oceanic and Atmospheric Administration, and fishermen are worried the gushing oil will take a more serious toll than Hurricane Katrina did in 2005. “Katrina was nothing but rain, water and wind. This is poison. It's gas,” oysterman Arthur Etienne said. Obama said Friday that federal officials were prepared to authorize moving forward with “a portion of” an idea proposed by local officials, who want the Army Corps of Engineers to build a “sand boom” offshore to keep the water from getting into the fragile marshlands. That did not satisfy Louisiana Gov. Bobby Jindal, who has advocated immediate construction of the booms. Noting in a written statement that 107 miles of the state's coast have been oiled, he said, “We continue to ask federal officials to approve our entire sand-boom plan from the northern Chandeleurs to the Isle Dernieres chain.” Obama said he has directed federal officials to triple the manpower in places where oil has hit shore or appears within a day of doing so. added by: holdmybackpack