We installed a neighborhood non-potable water system to 12 houses last month, while trenching (4" pipe doesn't plow well) we snagged a wire related to the potable water mains...The wire was about 5' from the water main locate. The Water district guy came out, it was some sort of sensor wire for a flow switch. He was there about two hours. We got a bill for almost a grand a few days ago. Ripoff???? We called for locate, it was not located, so we shouldn't have to pay it right?