By JIM SALTER, Associated Press

ST. LOUIS (AP) — An attorney for the agency that runs the home of the Rams says it is unlikely it will implement the team's plan to upgrade the Edward Jones Dome.

Already, there is speculation about a new stadium.

Arbitrators ruled last week in favor of the team's plan for upgrading the dome to "top-tier" status as required by the lease agreement with the dome owner, the St. Louis Convention and Visitors Commission. The CVC had proposed $124 million in renovations. The Rams didn't put a price tag on their plan but CVC and city officials believe it would cost $700 million to $800 million.

The CVC has 30 days from the date of the ruling on Friday to decide if it will try to implement the Rams' plan, though attorney Greg Smith said in a statement that step was "unlikely."

Smith and a spokesman for the Rams did not return messages seeking comment Monday. But Jeff Rainford, chief of staff for St. Louis Mayor Francis Slay, said there was almost no chance the CVC will even try to garner public support for spending hundreds of millions of taxpayer dollars to improve the dome.

"It will clearly be the job of the St. Louis civic community to keep the Rams in St. Louis, but with the least amount of public subsidy possible," Rainford said.

Unless the CVC implements the plan approved by arbitrators, the Rams' lease of the dome becomes year-to-year starting in March 2015. That creates the possibility that the Rams could leave St. Louis.

Rams management has said the team wants to stay, and NFL commissioner Roger Goodell said last week he was hopeful the stadium situation would be resolved. But the Rams have also been adamant that the dome is inferior to most NFL stadiums.

The CVC a year ago proposed improvements that included better amenities and a massive new scoreboard. It would have required to Rams to pay for $64 million of the $124 million cost. Voter approval in the city and county would have been required for the rest.