MLB.com: Miami ballpark deal progressing

The ballpark, replete with a retractable roof, would be located in a redevelopment district just miles inland from the American Airlines Arena, which is located on the banks of Biscayne Bay.

“Our highest priority this winter is to get a ballpark deal done in Miami,” Bob DuPuy, Major League Baseball’s president and chief operating officer, told MLB.com. “We’ve had tremendous cooperation from the county manager and the mayor.”
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The ballpark is projected to be funded in a 60-40 percent public-private partnership between the city of Miami, Dade County and the Marlins, DuPuy said, with the public funding coming from hotel-motel, facility and redevelopment district taxes. A sales or income tax that would directly affect Dade County citizens is not contemplated nor is state money at the moment.
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In South Florida, after a deal in Miami to build the facility on land near the Orange Bowl fell through several years ago when a $30 million gap in the project’s cost couldn’t be closed, the Marlins were allowed to explore moving the franchise to another state. But a possible shift to San Antonio was essentially nixed by MLB, which has decided to keep the team where it is.