Brettski,

I have to ask. If the dirt that came out of the trench was put back in, why dig a trench in the first place? The main reason to excavate a trench is to replace the dirt that was removed with good clay dirt to effect a seal. If the dirt is good clay anyway, why remove it? Another point. If you are going to pack the trench with a dozer, it needs to be at least twice as wide as the dozer, otherwise, how do you ever get a track on top of the center of the trench? If the trench is cut as wide as the dozer, you need a roller to pack it.