You need a good lawyer, perferably someone who specializes in real estate.
Talk to the local real estate agents who farm your part of town, for
recommendations. Buried trees are bad, they attract termites, and rot
slowly, so you may be facing problems with sink holes appearing for the next
20 years.

Also check to see if the water table in your area has risen, (call the
county water district) you maybe on top of a ground water supply that is
eroding the soil under your property. I really hope your homeowners covers
that, or add flood insurance or something to it soon.

As for dozers getting stuck, probably not in the type of hole you describe.
Up in BC, Canada, they have a term known as "equipment line" to describe the
rows of sequentially larger tractors and bulldozers that get stuck in the
mud. One truck gets stuck, so someone gets a tractor, tractor gets stuck,
someone gets a larger tractor to pull the first tractor out, second tractor
gets stuck as well, someone gets bulldozer by now you get the idea.

Sameer

"GeorgeR" wrote in message
om...
I purchased a new construction home that was built in 1999. Last
summer I had a dump truck full of mulch burry itself to it's axles in
my front yard. I thought it might have been from the water line to the
street and that the dirt was just soft in that area. Now that the snow
has melted my back yard (cleared one-acre lot) is riddled with so many
sink holes that I am afraid to let my 2 year old daughter walk in the
yard. I talked to my neighbor and he said that instead of hauling the
trees off the lot they were burried, leaves and all, in 3 or 4 large
20 foot deep holes. Some of these sink holes that recently appeared
are 4 feet deep! I can see large indentations in the soil around the
sink holes about 12 feet by 15 feet. What can I do? I was thinking of
renting a bulldozer to pack down the areas and top it off with fill
but I'm afraid I'd sink the dozer. Is it possible for a dozer to get
stuck? Is this something best left to professional and if so do I call
an excavator or a landscaper, or? Will I have to do this every spring
for the next 25 years? So much for pulling the car under a shady tree
in the back yard for a wax job! Any insight, suggestions or comments
would be greatly appreciated.
Geo in Cleveland