Read more New Prairie Flower Casino opened Nov. In a court fight with Nebrask, Iowa and Council Bluffs the Ponca Tribe has received federal affirmation from the NIGC of its right to keep the Prairie Flower Casino open. Read more Ponca Tribe wins federal support to keep Carter Lake casino open. The Ponca Tribe of Nebraska won another court decision Tuesday against the city government of Council Bluffs amd the state governments of Iowa and Nebraska. Read more Prairie Flower Casino kept open by U.S. Both Iowa and Nebraska had sued to close the Prairie Flower Casino which. Read more Prairie Flower Casino beats Iowa, Nebraska in Federal Court Septem-Ī federal appeals court handed a major victory last week to the Ponca Tribe of Nebraska and its Prairie Flower Casino. The event marked the 4th anniversary of the casino. Prairie Flower Casino broke ground last Monday on a major construction project to expand the current casino size by seven times. News Headlines Prairie Flower Casino breaks ground on major expansion project Novem.