The $87 million 78,000 square-foot expansion will be built between the existing casino building and the recently enlarged parking garage on the north side of the property. The proposed two-story addition will house a poker room, additional gaming areas, a ballroom for events, and a new restaurant. Rivers is jointly owned by Rush Street Gaming and Churchill Downs Incorporated. 17, 2021) – Rivers Casino Des Plaines (“Rivers”) has filed expansion plans with the City of Des Plaines and Illinois Gaming Board that, if approved, will allow the casino to add approximately 725 gaming positions, making it the first to have the state’s maximum number of 2,000 positions. Plans Call for Larger Gaming Floor, New Event Space, and Additional Restaurant Rivers Casino Des Plaines Unveils Expansion Plans, Including New Poker Room