In Ohio, the utility protection service (OUPS) is organized mostly by the utilities themselves. There is another phone call for some oil and gas lines. Their main concern is keeping the utilities from getting cut or ruptured. They only come out if there is something close by the site after you call and give them the location. They have plenty to do, so I don't think they would care about a few piles of dirt (unless there was a big hole next to them and a fiber optic cable sticking in the air !!).
Fish kills can happen for lots of reasons. Small ponds get "layered" in the summer with an area of low or no oxygen. A very cold rain, wind etc. can "turn over" the pond, bringing the poor oxygen water near the surface. This fish stay in their comfort zone, and die from lack of oxygen. The biggest die first because they require the most oxygen. Of course a field with surface water flowing from it and into the pond is always first seen and must be the cause, of course. It may be, but many times it has nothing to do with the real reason for the fish kill.
