I do, indeed! But, I know exactly where they are, and kept the lift trucks well away from that area. I did manage to drive over the vent riser of the soil line with a U-Haul truck when moving in, and broke the top of the vertical pipe. I sweated for a coule months that a big sinkhole was going to develop in my back yard due to breaking the soil line, but I think I'm in the clear as that was almost 20 years ago.
Jon
Not a problem - look in the Yellow Pages for "trench plate rentals" in your area. They send out a flatbed with a knuckle-boom and a pile of 1" thick steel plates with a threaded spud for a lifting eye in the center. They can back up and drop you a nice "instant road" through the backyard as they go, leave them for a few days as you do your moving project, then come back and pick them up.
Probably cheaper to call them than to buy an equivalent pallet-load of 3/4 plywood that you'll destroy doing the job, even if you put it down triple-layered. Then you have to pay "rent a bin" for a small roll-off to dispose of all the splintered plywood. And the rental company for the flat tire on the forklift when it broke through...
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Lost Creek Machine, dealers in used and new machine tools and tooling (some woodworking stuff also). Near Ottawa, IL for others reading this thread also.
Paul
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