Stoneboat

[JPablo]

stoneboat: a type of sleigh used for moving rocks from fields, for hauling milk cans, etc.

stoneboat: a flat-bottomed heavy wooden sled used for transporting or removing stones and other heavy articles. A stoneboat can also be used for smoothing soil, after weighing it down, such as with a heavy rock.

In Spanish I'd say something like "trineo para objetos pesados", but I bet there is another colloquial way to refer to this.

Any ideas?

I think of "apisonadora", but that doesn't quite cut it... (probably flattens it...)