Saw some info yesterday about the costs associated with ruts in your field. Basically, just based on the latest custom farming rates, it could cost you $15/acre to smooth out ruts and avoid future damage:
"So if 25% of a field were rutted and production in those areas reduced by 10%, that would mean a 2.5% yield loss," one expert says. "At 200 bushels/acre and corn at $6.00/bushel, that would be $30 lost/acre. So perhaps $50 cost per acre for rutting is not unrealistic."