How long does it take to dig a grave with a bulldozer?

A coffin need 4 feet width and 7 feet length and efficient bulldozer/excavator

driver will do it in 15 minutes to the 6 feet depth Answer: A backhoe or Bobcat is more often the tool of choice for individual graves as the geometry of the finished hole is more adaptable to lowering the coffin. With dispatching time, setup and all as well as the actual excavation you'd be looking at a couple of hours. Hand digging is slower but neater. The sides should be shored up to prevent collapse while workers are in the grave. Allow a day for completion.

Mass graves are another case. Use a bulldozer or explosive