Owner Jack Kent Cooke of the Washington...

Owner Jack Kent Cooke of the Washington Redskins announced that he would finance construction of a 78,000-seat stadium for the Super Bowl champions, to be completed by the 1991 season.

“It’ll hold 78,000 fans, it will be an open-air stadium, it will have natural grass,” Cooke said at a team luncheon in Washington.

Last August, Cooke threatened to move the team after its lease at RFK Stadium expired in 1990 if the city failed to pay for construction of a 75,000-seat domed stadium.

Cooke also announced that quarterback Doug Williams has been given a new three-year contract. Williams, 33, who was starting the final year of a three-year contract, was to have received $550,000 this season, a salary well below those of most of the league’s other starting quarterbacks. The new terms were not announced.