Today while I was clearing my land off with my tractor, I came across a hole in the ground that was covered with some steel slates. After further careful inspection I found the hole to be an old water well. The well has no pipe or casing and is around 24" wide. I dropped a rock in the hole and it took about 10-15 seconds before I heard anything. Is there anyway I could test to see if this well would be worth running a pump down and using it for irrigation? There is no telling how old it is. Is there anyway of knowing if there is actually water in it?