Louis, in an effort to help the financially troubled city. One of the licenses was guaranteed to East St. Illinois enacted a riverboat casino law in 1990 authorizing licenses for ten casinos to open around the state. History The Casino Queen in 2006 with the White Star One riverboat in the foreground and the hotel tower in the background The gaming floor floats on a basin filled with 340,000 gallons of water, but the rest of the property's amenities are built on dry land. It is still nominally a riverboat casino, but moved onto land in 2007. It is owned by Gaming and Leisure Properties and operated by The Queen Casino & Entertainment, an affiliate of Standard General. Louis, Illinois, just across the river from St.