ST. LOUIS — St. Louis upped its bid Friday to either keep the Rams or lure a new NFL team, unveiling plans Friday for a new open-air football stadium on the banks of the Mississippi River.

The 64,000-seat stadium would cost $860 million to $985 million, with construction beginning in 2016 and completed by 2020.

The proposal was announced by attorney Robert Blitz and former Anheuser-Busch president David Peacock, the two-man team appointed by Missouri Gov. Jay Nixon in November to develop the plan.