AdvertisementAfter 30 Years, Derby's Dirt Guru Hits Finish LineMay 04, 2012Rick HowlettfacebookEmailThe field of horses charges down the stretch in the seventh race at Churchill Downs in Louisville, Ky., on June 19, 2009. The day marked the first night racing at the storied track in its 135-year history. Track superintendent Butch Lehr is retiring after Saturday's race. He's been maintaining the track since 1982. (AP)