After the sand was in and we compacted it, the plumbers did the groundwork plumbing. The day after the plumbers were finished, it snowed. Then it kept on snowing and we ended up with 2 feet of snow. Since the ground work wasn't buried because it needed to be inspected, we had to insulate the pipes with pipe warmers and insulation so that the water in the pipes wouldn't freeze and ruin the pipes. That was alot of fun.