Pool water temps here are 55F. How about by you? What part of Indiana?

If your hole in the groujd is a shovel deeper than the pipe and if youre materials are at the ready, take a couple of practice "dry" runs, you wont lose a whole lot of water. Certainly not enough to fill your hole in the ground. Oh you will get plenty wet in the face and spattering mud, but its not as bad as you'd think. To me, its almost a lot like caving. Cold muddy water, cramped space. Its all good.