NEW YORK, NY July 06, 2009 —And it looks like another stalemate could be in the offing, and that's over the dispute over who'll pay for what at the World Trade Center site. Developer Larry Silverstein has filed an official notice that will allow him to take the dispute to arbitration in two weeks. WNYC's Matthew Schuerman has more.

REPORTER: Silverstein is supposed to build three office towers at the World Trade Center site. But he says he needs the Port Authority, which owns the property, to guarantee his construction loans in order to proceed.

He says financing is much tougher to come by because the Port Authority won't make the deadlines for parts of the site that it's in charge of, like the PATH terminal.

The Port Authority is willing to help somewhat. But it says every dollar it devotes to office development is one less dollar it can spend on the region's airports, seaports, tunnels and bridges. Ratcheting up his own rhetoric, Mayor Bloomberg says the Port Authority is creating a "false choice". For WNYC, I'm Matthew Schuerman.

REPORTER: The Port Authority took responsibility for developing One World Trade Center three years ago, and is expecting to finish it by 2013.