RS, I don't know about silt, but there is a lot of sediment. It is an odd way, but I don't know how to change it. The pipe that goes underground is too small to fit any pumps I've ever seen. At least, the pumps would not be able to fit in the hole. My well service guy got grandfathered in & said he didn't know how to change things up. Unfortunately, I suspect his father may have passed away. A few years ago the old man had cancer and was not doing well. Mr. Show used to be very good about calling back and responding but he isn't anymore. I hope he's doing OK.