How many of you guys mow retention ponds? What equipment are you using? I am looking at multiple ponds for a bid that range from 1 acre up to 5 acres. Do you charge more because of the chance of dealing with the soggy ground. I am figuring at least 15% more for the hazard. Also any one have to use a 4X4 tractor with mower cause of soft ground in the bottom of ponds? Does your rate change for the tractor compared to Z? Any input on this topic is appreciated.