Additional reading seems to indicate that the irrigation system dates back to 1976 (lots of time for anything electrical to age and deteriorate) and that it is hydraulically driven, which means there would be no electric wires along the pipe. If the pump is not electrically driven, I don’t see any need for electric power to the system. Google-Earth does not have a good picture for this farm and I cannot identify the well.
Apparently the property owners do not live on the farm and were on vacation at the time of the accident. A cold front with accompanying rain & thunderstorms had moved through the area on the previous day, Sunday.
Raising hybrid seed corn takes specialized equipment and I am sure the land owner does very little of the work except maybe for soil preparation and in this case any necessary irrigation.
I'm not sure where you grew up, but the farmer would have every piece of equipment to raise the corn except perhaps the corn picker, which is an ear corn picker. He may contract it out, but there isn't anything 'specialized' to raise and harvest the seed corn.