PITTSBURGH — A Pittsburgh utility has a message for departing Iron City Brewery — you owe us $600,000.

The Pittsburgh Water and Sewer Authority made concessions in 2007 that allowed the city icon to emerge from bankruptcy. Now, the brewery has announced plans to shift production about 40 miles away to Latrobe, although its headquarters is to remain in Pittsburgh.

Executive Director Michael Kenney says the authority is owed the money because Iron City is shutting down its 148-year-old Lawrenceville brewery after less than two years of operations.

Company president Timothy Hickman says he will wait for the authority's letter before commenting, but the firm will honor all of its agreements.

The brewer originally owed the authority $2.7 million for unpaid water and sewer bills. Under the deal, that was reduced to $1.5 million, of which $460,000 was repaid, $40,000 waived due to early payment and $400,000 forgiven due to plant improvements.

NEW YORK — The amusement park company Six Flags is seeking Chapter 11 bankruptcy protection, saying it needs to reorganize and shed $1.8 billion of debt.Mark Shapiro, the New York-based company's chief executive officer, says the move won't affect the operation of its 20 theme parks in the U.S., Mexico and Canada.Six Flags says it actually had a great year in 2008. It saw 25 million visitors and posted record revenues. But executives are trying to lighten a $2.4 billion debt load that they say is unsustainable.Saturday's bankruptcy filing came after an earlier plan to negotiate an out-of-court deal with creditors failed.Six Flags shares have traded below $1 since September. They closed at 26 cents on Friday.

NIAGARA FALLS, Ontario — The United States and Canada say they will update a key agreement to protect the Great Lakes.Environmental groups have pushed the leaders of both countries to rewrite the 1972 Great Lakes Water Quality Agreement in response to new threats to the world's biggest surface freshwater system.Secretary of State Hillary Rodham Clinton and Canadian Foreign Affairs Minister Lawrence Cannon said Saturday that the agreement will be revised to address such issues as invasive species, chemicals and climate change.The agreement was last updated in 1987.The officials made the announcement during a ceremony marking the 100th anniversary of the Boundary Waters Treaty of 1909.The treaty created an international commission to settle disputes between the two countries.