NEW YORK, March 2 (Reuters) - BP Plc has reached an estimated $7.8 billion deal with businesses suing over the massive 2010 Gulf of Mexico oil spill, the company said on Friday, but the oil giant still faces claims by the U.S. government, Gulf states and drilling partners.

U.S. District Judge Carl Barbier, in an order made three days before the case had been due to go to trial, said the proposed terms of the class settlement would be submitted to court for approval.

He had already delayed the start of the trial to allow the Plaintiffs' Steering Committee, representing fisherman and businesses whose livelihoods they said were damaged by the explosion of the Deepwater Horizon rig and massive oil spill from the Macondo well, to negotiate.

Lawyers for the committee, Stephen Herman and James Roy, said the settlement would compensate hundreds of thousands of victims.

"It does the greatest amount of good for the greatest number of people," they said.

BP said the cost of the proposed settlement would be around $7.8 billion, including a commitment of $2.3 billion to help resolve loss claims related to the Gulf seafood industry.

It said the proposed settlement was not an admission of liability and that BP would assign to the plaintiffs some of its claims against Transocean and Halliburton.

OTHER CLAIMS PENDING

Apart from BP, which owned 65 percent of the Macondo well, the main corporate defendants are Switzerland-based Transocean Ltd, which owned the Deepwater Horizon, and Houston-based Halliburton Co, which provided cementing services for the well. They are also suing each other. Several other companies are involved in the trial.

Eleven people were killed in the explosion on April 20, 2010, and 4.9 million barrels of oil spewed from the mile-deep well in by far the worst offshore U.S. oil spill.

A settlement would remove a significant portion of the complex case, but it would not put an end to BP's exposure.

The oil giant still faces claims by the U.S. government, which is pursuing violations of the Clean Water Act and other laws, which could result in fines totaling billions of dollars.

BP also faces claims from Gulf states as well as its drilling partners.

"Delays or deals made by other players do not change the facts of this case and we are fully prepared to argue the merits of our case based on those facts," said a spokesman for Transocean.

The U.S. Justice Department said it was prepared to go to trial to hold those responsible accountable for outstanding federal claims.

"The United States will continue to work closely with all five Gulf states to ensure that any resolution of the federal law enforcement and damage claims, including natural resources damages, arising out of this unprecedented environmental disaster is just, fair and restores the Gulf for the benefit of the people of the Gulf states," department spokesman Wyn Hornbuckle said.

David Uhlmann, a University of Michigan law professor and former chief of the Justice Department's environmental crimes section, said the settlement was good news for the victims of the Gulf oil spill "who will see their losses compensated much more quickly than the victims of the Exxon Valdez oil spill".

"It also paves the way for BP to negotiate agreements with the federal and state governments and begin the process of moving beyond the Gulf oil spill," he said.

(Reporting by Andrew Longstreth; Additional reporting by Andrea Shalal-Esa in Washington)

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