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Do you have a laser transit? I have one man, one machine, one transit. He should be able to excavate for base, install base material, while one guy moves around tamping the lifts. And, on most jobs, one man can do that by himself. Very little hand work. Can't imagine having 3 men on the prep work, unless it's a really big job, then I'd have 2 machines running and 1 tamping.
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