The new casino and hotel will be developed on 125 acres two miles west of Bartlesville off US-60. The Nation is seeking requests for proposals on construction of a second Bartlesville casino. OKLAHOMA CITY – After waiting years for approval from the federal government, the Osage Nation plans to construct two new casinos in Osage County that will be bigger than existing facilities, offer more Class III games, and will include a hotel at each site.