Warrior Hotel, Downtown Sioux City, courtesy Marriot Hotels, Autograph Collection Edit | Remove 010620 404 The Sioux City Council will be asked today to approve a pre-construction agreement with the Iowa Department of Transportation for the reconfiguration of Iowa 12/Riverside Boulevard to a three-lane roadway, according to the Sioux City Journal. The project would reconfigure Iowa 12/Riverside Boulevard from four lanes to three on Iowa 12 from War Eagle Drive to Military Road. Riverside