I fished another stream in Del Co today and the water was 69 at 10:30. That was on a much bigger stream with better flow than Ridley.There are plenty of fish in most of the local streams, but the temps will be in the 70's unless we get a radial cold front (not likely). So if you are going to fish for trout in DE Co. you may as well keep them; chances of them surviving will be slim. I'm probably done around here till fall. If you must fish you owe it to the trout to carry a thermometer.