When I bought this place 2 yrs ago. I knew there was a cistern about 10 ft from the kitchen door. Last yr. I was so busy that I didn't pay much attention to it. This spring I raised up a piece of concret and looked and it is full of water. My son says, fill it up and cover it up. But, I can't see destroying a perfectly good cistern. I've got a good well so I don't need the water. But who knows about the future. If I keep it, it will have to have a new top on it. It might be dangerous as it is. I was thinking today. Why not put a hand pump on it, and use the water to water things. Will mosquitas breed in the water? Any way to keep them out? Or an organic substance to kill them? Any body know any thing about cisterns?