BP conceded Thursday that more oil than it estimated is gushing into the Gulf of Mexico as heavy crude washed into Louisiana's wetlands for the first time, feeding worries and uncertainty about the massive monthlong spill.
Mark Proegler, a spokesman for oil giant BP PLC, told The Associated Press that a mile-long tube inserted into a leaking pipe over the weekend is capturing 210,000 gallons a day - the total amount the company and the Coast Guard have estimated is gushing into the sea - but some is still escaping. He would not say how much.
Several professors who have watched video of the leak have said they believe the amount spewing out is much higher than official estimates.
Special Section: Disaster in the Gulf
See live video of the leaking oil
Since the April 20 explosion, BP officials placed the flow rate at 5,000 barrels a day, or 210,000 gallons - a figure accepted by the government and widely reported as accurate. Those estimates put the total amount of oil spilt into the Gulf at around 6 million gallons.
However, after BP succumbed to pressure to release the video footage of the blown-out well, those numbers have fallen under intense scrutiny. Steve Wereley, a mechanical engineer at Purdue University in Indiana, told The Associated Press that he is sticking with his estimate that 3.9 million gallons a day is spewing from two leaks.
"I don't see any scenario where (BP's) numbers would be accurate," he said at a congressional hearing Wednesday.
His estimate of the amount leaked to date, which he calls conservative and says has a margin of error of plus or minus 20 percent, is 126 million gallons - or more than 11 times the total leaked from the Exxon Valdez disaster in 1989.
Proegler said the 210,000 gallons - 5,000 barrels - has always been just an estimate because there is no way to measure how much is spilling from the seafloor.
"I would encourage people to take a look at the changing amount of oil coming from the ocean floor," said Steve Rinehart, another BP spokesman. "It's pretty clear that now that we're taking 5,000 barrels of oil a day, there's a significant change in the flow reaching the sea."
The timing of BP's admission may partly be due to the fact that the company knew that today the public would get its first extensive look at video of the leak, reports CBS News correspondent Sharyl Attkisson, as a group of lawmakers compelled the company to release video from the undersea leak site.
"What you see are real-time images of a real-world disaster unfolding 5,000 feet below the surface of the Gulf," said U.S. Rep. Edward J. Markey, D-Mass. "These videos stand as a scalding, blistering indictment of BP's inattention to the scope and size of the greatest environmental catastrophe in the history of the United States."
A live video feed of the leak posted online Thursday at the insistence of lawmakers shows what appears to be a large plume of oil and gas still spewing next to the tube that's carrying some of it to the surface. The House committee website where it was posted promptly crashed because so many people were trying to view it.
"I think BP has known the scope of the problem all along," Markey told Attkisson.
BP also looped in two senators who've been after the video for ten days - Barbara Boxer and Bill Nelson.
"It was exceptionally hard [to get the video]," Dan McLaughlin, a spokesman for Sen. Nelson, told Attkisson. "It took two committees and two U.S. senators to finally get them to produce it."
The members of Congress who saw the video accuse BP of trying to hide the truth.
"BP has lost all credibility," Markey said at a Thursday press conference.
U.S. Interior Secretary Ken Salazar said the "government will be making its own, independent verification of what those total numbers are," during an appearance on CBS' "The Early Show" Thursday.
"We don't know whether [the damage is] going to be minimal or not. It could be catastrophic," Salazar said, adding that BP is " to make sure that everything is made whole including the environment and the people that will be affected."
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The well blew out after an explosion a month ago on the offshore drilling rig Deepwater Horizon that killed 11 people.
The well blew out after an explosion a month ago on the offshore drilling rig Deepwater Horizon that killed 11 people. At least 6 million gallons have spilled so far, making it the worst U.S. environmental disaster in decades. The Exxon Valdez tanker spilled 11 million gallons in Alaska in 1989.
Small amounts of light oil have washed up in delicate coastal areas of Louisiana over the past several weeks, but nothing like the brown ooze from the spill that started coating marsh grasses and hanging in the shallow water of a wetland Wednesday.
"This is the heavy oil that everyone's been fearing that is here now," Gov. Bobby Jindal said during a boat tour Wednesday in southeastern Louisiana. The wetlands at the mouth of the Mississippi River are home to rare birds, mammals and a wide variety of marine life.
A young brown pelican, one wing and its neck matted with oil, was found dead Thursday morning on a sand spit in the Breton National Wildlife Refuge, a renowned bird sanctuary eight miles off Louisiana's coast that had so far been shielded from the worst of the spill. Scientists said it's likely oil killed it.
Much of southeast Louisiana's coastal waters have been closed to fishing and oyster harvesting because of the oil. A vast area stretching east toward Florida in federal waters also has been closed to seafood harvesting.
With heavy oil now hitting Louisiana's coast, Jeff Gallet is grabbing what he can, while he can. He's a fourth generation oyster fisherman, and he's scared, reports CBS News correspondent Mark Strassmann. Literally any day, he says, BP's oil could put him out of business.
"We're starting earlier, working longer, trying to get as many as we can," Gallet said. "Every oyster counts."
In Grand Isle, La., oil blackened beaches for the first time Thursday. The fishing community is the state's first residential area hit by the oil - like almost 50 miles of Louisiana's shoreline.
Off Elmer Island, oil hit a sand barrier built as protection within the last two weeks. State and local officials want 40 more of them built - but complain about Washington's red tape.
Officials in Florida sought to reassure tourists that the state's beaches are clean and safe as government scientists said a small portion of the slick , a stream of fast-moving water that circulates around the Gulf before bending around Florida and up the Atlantic coast.
During a news conference, David Halstead, director of the Florida Division of Emergency Management, showed off a picture of a Coppertone bottle on a beach.
"What's the only oil on the beaches? Suntan oil," he said.
Video from National Geographic shows the Deepwater Horizon sinking:
Tracking the unpredictable spill and the complex loop current is a challenge for scientists, said Charlie Henry, a NOAA environmental scientist.
The loop moves based on shifting winds and other environmental factors, so even though oil is leaking continuously it may be in the current one day, and out the next. The slick itself has defied scientists' efforts to track it and predict its path. Instead, it has repeatedly advanced and retreated, an ominous, shape-shifting mass in the Gulf, with vast underwater lobes extending outward.
Florida's state meteorologist said it will be at least another seven days before the oil reaches waters west of the Florida Keys. U.S. officials were also talking to Cuba about how to respond to the spill should it reach the island's northern coast, a U.S. State Department spokesman said.
BP, which was leasing the rig when it exploded, was marshaling equipment and conducting tests Thursday ahead of a new effort to choke off the oil flow. Crews hoped that by Sunday they can start a procedure known as a "top kill," which involves pumping heavy mud into the crippled equipment on top of the well, then permanently sealing it with cement.
The procedure has been used before to halt gushing oil above ground, but like other methods BP is exploring it has never been used 5,000 feet below the sea. That's why scientists and engineers have spent much of the past week preparing and taking a series of measurements to make sure the mission doesn't backfire.
"The philosophy from the beginning is not to take any action which could make the situation worse, and those are the final steps we're doing," said Doug Suttles, BP's chief operating officer.
In Washington, environmental groups criticized how BP PLC, the oil giant that operated the Deepwater Horizon rig, has handled the response, and urged the government to take greater control of the situation.
"Too much information is now in the hands of BP's many lawyers and too little is being disclosed to the public," Larry Schweiger, president of the National Wildlife Federation, told the House Transportation and Infrastructure Committee. "The Gulf of Mexico is a crime scene and the perpetrator cannot be left in charge of assessing the damage."
BP has received thousands of ideas from the public on how to stop the oil gusher, but some inventors are complaining that their efforts are being ignored.
Oil-eating bacteria, bombs and a device that resembles a giant shower curtain are among the 10,000 fixes people have proposed to counter the growing environmental threat. BP is taking a closer look at 700 of the ideas, but the oil company has yet to use any of them.
"They're clearly out of ideas, and there's a whole world of people willing to do this free of charge," said Dwayne Spradlin, CEO of InnoCentive Inc., which has created an online network of experts to solve problems.
BP spokesman Mark Salt said the company wants the public's help, but that considering proposed fixes takes time.
"They're taking bits of ideas from lots of places," Salt said. "This is not just a PR stunt."
Anger over the spill has mounted as the efforts to stop the leak have dragged on. Greenpeace activists scaled BP's London headquarters Thursday to hang a flag accusing the oil company of polluting the environment. The group said the action was prompted by the Gulf of Mexico oil spill as well as a controversial project in Canada.
"It takes some cheek to go and use a sunflower logo when your business is dirty oil," Greenpeace activist Ben Stewart said from a balcony above the headquarters' front door in a telephone interview.
BP spokesman Robert Wine called the action "a very calm and genteel protest," and said no employees had been prevented from getting to work.