Belkin456, you are looking at 2 loads of stone that cost around a thousand. We have since put two more loads on the opposite end(where i was standing taking the picture) to help catch the runoff from the adjacent field.The bank was dug back some and the stone was laid. No underlayment was used and besides a few strays, the stone is staying in place. The bottom pool is around three feet,but is going fast, we presume well be dry here soon and ready to do some work on compacting.