re: Can anyone estimate the cost of converting a ditch to culverts?

We don't have a homeowners association. I actually want to have culverts for a couple reasons. I need some fill dirt in one spot in my lawn and I have a friend who runs a trucking company and will bring me free dirt, but he said his big truck will crack my driveway. I also need to gain a couple parking spots for parties. So the roundup method isn't an option.
I might just do one side of the driveway to start if the parish will even allow me to do it. The guy down the street doesn't have ditches, however I'm not sure if they were in place prior to any new regulations or what. I suppose I could walk down and ask him.