I'm rebuilding an old spring well that was roughly 4ft deep 3ft wide, I want to put a culvert or something similar to hold more water. I dug a new hole roughly 8ftx8ft and 6-7ft deep. Has anyone else done this i'm trying to find pipe but it's hard where i'm at so now i'm considering cinderblock construction. If you have any tips or alternatives that would be greatly apricated. Picture of me pointing is where the water is coming out of so i'm thinking of backfilling with river rock up to that spot than building up from there and maybe adding a foot more of rock inside.