Driving over Buried Drainage

[Gary Fowler]

With 2 feet of cover, properly compacted, you could drive a 747 airplane over it without damage. The crushed stone will lock together and be more like concrete when compacted.
I dont recall you mentioning the thickness of the pipe, but anything over schedule 20 should not have an issue with stone damage. When calculating pressure on buried objects, you figure the area like it is a cone with 45 degree side. So at 2 feet deep, you have what ever pressure that is exerted on top spread out over a 2 foot circle at the bottom.

 

[Woodsman603]

Got to "finishing" the area today. Still needs some final touches. But I drove over it and the stone didn't even budge. You should see the stream of water flowing out the end into the woods. So all looks good.

 

[Pixguy]

I just did the same in a parking area for my rv so I buried sched 40 perfed to be sure.