A ready-mix concrete company in Iowa has pleaded guilty to anti-trust charges. According to the May 18 complaint, GCC Alliance Concrete Inc., Orange City, Iowa, conspired with other competitors to fix prices and rig bids between January 2008 and August 2009. Sentencing is pending. The plea bargain comes after GCC’s former sales manager Steven VandeBrake was sentenced in February to serve 48 months in prison and a criminal fine of $829,715.