I have the chance to get several old concrete man-hole or meter tubes. They are about 3' long and 1.5' diameter. I think I'll have to put them in 9-10 feet of water so that they don't grow over with weeds.

My question is should I lay them on their sides so that they act as horizontal caves, or should I try to stand them up. I think if I lay them over I'll run them parallel to the bank so that jigs and lures will slide over them instead of hanging up on the lips. If I stand them up they could make for some nice vertical jigging spots. Target species will be large mouth bass or crappie.