Word has it that the Chicago mob used to dispose of inconvenient corpses Up North in Wisconsin. Here's the technology: One logging chain, one small Cat bulldozer, one large pine tree. Attach chain to Cat, wrap around pine tree. Pull pine tree to about a 30 degree tilt. Insert inconvenient item under tree roots. Put Cat in reverse, allow pine tree to right itself. Detach chain.
This causes much less root damage than a backhoe, and also leaves no 'fresh dirt' telltale signs.