The stage has been set for a legal showdown between Washington County and the city of Riverside. Supervisors this week formally engaged Iowa City based Meardon, Sueppel and Downer as their representative in the revenue sharing dispute. The conflict stems from an arrangement forged when the Riverside Casino was built. Attorney’s for the city have said the contract is void under state law, because it creates constitutional debt. County Attorney Barb Edmondson has said she feels the agreement is legal and enforceable. The deadline for Riverside to make an annual payment was yesterday (7/1).