A five-story mixed-use building proposed for near the corner of Benton Street and Riverside Drive in Iowa City is seen in a rendering. The project, from Iowa River Development LLC, would include a restaurant, commercial space and residential units. (Shive-Hattery Inc.)A five-story building with a restaurant, commercial space and residential units overlooking the Iowa River has been proposed for Iowa City’s Riverfront Crossings district.The project, from developers Kevin O’Brien and Hunter Parks working as Iowa River Development LLC, also calls for an addition to the Staples building at 820 S.