yeah my dad and neighbor went and got several loads of rock and dirt to fill it after they made a big enough hole to unload it in. I think my dad said it was were a old sump pump use to empty into I could be wrong will have to ask my parents later but I am pretty sure that is what it was. There might be another one in the open lot they have because no matter how much I try to fill this hole it always sunk back in.. gcgrad could of been same thing in your old yard this happened on marshall