If the well was sealed off, a 100' deep well will only hold about 150 gallons of water. You are just pouring water into a crack in a rock and it will probably go somewhere else. A larger cistern for the Well Manager would be better. A 1500 gallons storage tank is sealed and the water can't leak out and go away. Your well might even be able to keep up if you have a larger cistern tank. If nothing else, the water from Water Wagon would not just be wasted pouring it down a hole in the ground.