I will be installing a new culvert pipe under a gravel driveway next week and was wondering what some of you guys typically do. Will be renting a mini ex to dig the old plastic pipe out. I will be putting down an erosion mat then the new pipe then backfilling the rest with new gravel. I have not done this on my own yet but did one a long time ago with my father when the moving truck crushed his. Give or take 6 years ago with that one. Any tips or suggestions would be much appreciated.