Lead singer Tim Ruth and local band Under D Influence perform during the LogJam music festival at the Homer Tree Service property in Lockport Friday, August 3, 2012. | Brett Roseman~Sun-Times Media
Lead singer Tim Ruth (left) and local band Under D Influence perform during the Logjam music festival at the Homer Tree Service property in Lockport Friday, August 3, 2012. | Brett Roseman~Sun-Times Media
Local band Under D Influence performs classic rock songs during the LogJam music festival at the Homer Tree Service property in Lockport Friday, August 3, 2012. | Brett Roseman~Sun-Times Media
Julia Pesavento, 16, (left) and Lauren Werth, 15, both of Lockport, ride the Power Surge at the carnival during the LogJam music festival at the Homer Tree Service property in Lockport Friday, August 3, 2012. | Brett Roseman~Sun-Times Media
LOCKPORT — Ron Reposh stood on the stage Friday night and addressed the crowd of 4,000 fans, with the lights of the Ferris wheel and carnival midway shining behind them. He revved up the crowd by announcing the night’s main act, Survivor. This was LogJam, …