No expert but, I would say once you get below the frost line he would be correct, the ground would not be frozen and it will have plenty enough moisture to compact. If this wasn't the case all water lines would be freezing. The main thing I would want to make sure of is he was working at a fast enough pace digging and compacting before the freshly dug earth could freeze. I would want to also be sure he could complete construction and compaction of dam all in one day to prevent one section from freezing then having a section finished on top of it. Just my thoughts.
Last edited by Medic828; 01/02/18 01:49 PM.
