President Bush is expected to seek an 80-day suspension of a West Coast lockout that has crippled trade, after he reviews a report on the labor dispute's impact by a special panel he created Monday.

It would mark the first effort in a quarter-century to end a work stoppage under the Taft-Hartley Act.

Bush created a board of inquiry to determine the impact of the lockout and could petition the U.S. District Court in San Francisco as early as Tuesday to halt the lockout for 80 days, an administration official said.

Monday's move came hours after contract negotiations between workers and management collapsed. Port operators and manufacturers' groups applauded the move, but the longshoremen accused the administration of trying to break the union. The workers have been locked out, without pay, by management.

In an executive order, Bush gave the board of inquiry one day to report back to him, and the Labor Department official said the administration would ask the U.S. District Court in San Francisco for an 80-day cooling-off period. Though the administration promised an unbiased examination of the lockout, Bush appeared to have made up his mind that it was hurting national security and the economy, and merited federal intervention.

"A continuation of this lockout, if permitted to continue, will imperil the national health and safety," Bush wrote in his executive order.

"Ordinary Americans are being seriously harmed by this dispute," Labor Secretary Elaine Chao said. "Family farmers and ranchers are being devastated by the shutdown. Millions, if not billions of dollars of American produce, meat and poultry are rotting in containers on the docks and on idled trucks and rail cars." The lockout has already caused layoffs, and could prompt thousands more, her department said.

The department also warned the lockout could hurt national security, because the armed forces and defense contractors rely on commercial ships that use West Coast ports.

The formation of the board of inquiry -- a step taken only rarely by presidents -- is required under the Taft-Hartley Act before the president can order management to let the workers back in. Bush's next step would be to make his case in federal court, with Attorney General John Ashcroft asking for a ruling that the dispute is hurting entire industries and jeopardizing national health or safety.

Chao said that if an injunction is granted by the court, the ports could be reopened in a matter of one or two days.

But historically, cooling-off periods have failed to permanently end labor disputes.

Labor Department Solicitor Eugene Scalia told reporters that there had been 11 coast-wide dock work stoppages since the Taft-Hartley Act was passed in 1947 and in all of those cases, the president sought injunctions after convening a board of inquiry.

In at least eight of those instances, the 80-day cooling-off period failed to resolve the dispute and the work stoppage resumed once it was over.

"Experience shows that this simply delays the settlement process," said Michael LeRoy, professor of labor and industrial relations at the University of Illinois at Urbana-Champaign. "It does not end the dispute by any means. Typically what happens is the parties go back to their corners and stew."

Just before the 80 days end, "they rush back to the table more angry than they were 80 days before," he said.

But a cooling-off period would keep the ports open during the crucial Christmas season, in which retailers are relying on imported goods to stock their shelves. The tradeoff for the Bush administration, LeRoy said, is that a mandatory cooling-off period could energize organized labor -- traditionally a Democratic ally -- just before midterm elections.

Jimmy Carter was the last president to seek to use Taft-Hartley to end a work stoppage in the coal industry in 1978. The court refused to order the 80-day cooling off period but did order miners back to work under a temporary restraining order. Bush is the first president to invoke Taft-Hartley during a lockout, as opposed to a strike, LeRoy said.

The Pacific Maritime Association, which represents shipping companies and terminal operators, has locked out 10,500 members of the longshoremen's union, claiming the dockworkers engaged in a slowdown late last month.

The association ordered the unpaid lockout until the union agrees to extend a contract that expired July 1. The main disputes are over pensions and other benefits, and whether jobs created by new technology will be unionized.

PMA President Joseph Miniace praised Bush's move. "The ports are going to be open soon and this crisis we are in will be over," he said.

But James Spinosa, president of the International Longshore & Warehouse Union International, said, "The government, along with the corporate world, are trying to break unions," he said.

Labor talks broke off in San Francisco late Sunday night after the union rejected the latest contract proposal.

The White House estimated the lockout, which entered its second week Sunday, is costing the economy up to $1 billion a day. Robert Parry, president of the Federal Reserve Bank of San Francisco, said it is costing $2 billion a day. Bush's decision came on a day when a CBS-New York Times poll suggested two-thirds of Americans believe he should be spending more time on the economy.

The number of cargo vessels stranded at West Coast docks or backing up at anchor points has risen to 200. Dozens more were still en route from Asia. Already, storage facilities at beef, pork and poultry processing facilities across the country are full -- crammed with produce that can't be exported.

Bush named to the board of inquiry former Sen. Bill Brock, R-Tenn., a former U.S. trade representative and labor secretary; Patrick Hardin, a professor at the University of Tennessee College of Law and one-time National Labor Relations Board official; and Dennis R. Nolan, a professor at the University of South Carolina law school and vice president of the National Academy of Arbitrators.