Happy homeowner fired their contractor and hired us to put a fibreglass pool in this hole. It's a start over with the added feature that we have constant ground water. Dug down to a firm bottom, layed mirafi 600 down, 12"-18" of gravel with mirifi on top. Along with that we added a pumping system, upgraded their electrical panel to handle a pump 24-7 while we do the job. Will post more magic as the project progresses. Crane and backfill this coming Monday. Bottom has to be graded within 1/4" of their finish bottom specs......doing that tomorrow.