Not sure about your area but here we have several old gravel pits and some still in use. I'm really familiar with 2 large ones and have known the family that started them for over 40 years. Here they pump gravel down to about 50 feet and I doubt any of them were ever stocked. I know the 2 weren't but they have lots of fish. A lot of nice Crappie are caught in the spring and there are some big catfish and LMB up to about 5 pound are common. Biggest I ever saw was 8 pound. Oddly enough, BG of any size range are few. Maybe the bass eat the crappie. Virtually no vegetation and clear water. I've never seen schools of minnows, just 2 or 3 at a time near the shore. I suspect nearly all get eaten in the clear water. However, the larger fish all look to be in good shape.
