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STEP 1 : I have dug a 2" deep trench, after setting my string line and checking for 90º corners with the strings marked at 3' and 4' to give the hypotenuse of 5'. The challenge will come when I lay my pipe and then work to get level, since my yard slopes up to the fence line, albeit to a very, very slight degree. I'll use my long level to check each side of the run, and dig or fill in the trench as needed. My main concern is that the front run, the one the trailer will go over as it's backed into the shelter, is completely in the trench to lessen the chances of it cracking and/or offering any resistance as I back my RV in.
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