By Jerry MackeyDUBUQUE, Iowa (June 3) – Joel Callahan topped the strong field of IMCA Modified drivers in in scoring the 20-lap feature win Sunday at Dubuque Speedway.Callahan took the lead near midway and held off Tyler Madigan at the checkers. Troy Bauer followed up a feature win at Farley Speedway on Friday night with another victory in the Karl Chevrolet Northern SportMods. Bauer took the win over always tough Tyler Soppe. Sunday, June 10 will be Fan Appreciation night at Dubuque with everything half price, including admission and all concessions. In addition, a pre-race car show will be held beginning at 4:30 p.m. All kids will be given autograph books courtesy of the Richardson Motors Kids Club. Drivers will have cars on display and will be signing autographs prior to the races.