Sorry to worry ya - we only tested the ice on the big pit and didnt hang around . Not having a tape measure I used my index finger to measure it { thats 3.5 inches , I just checked } the ice thickness on Ringneck was past my finger so its at least 4" if not more . Here is a link for the DNR web site on ice fishing saftey
http://www.in.gov/dnr/fishwild/3601.htm and I agree that people should not be out on ice until its 3.5 to 4 iches thick . Also avoid large cracks , cloudy ice , ice with lots of bubbles in it and listen for tell tale booming and cracking . The ice we fished was clear , if its snow covered use your boot to sweep it aside to check . Never jump up & down or run - slide over the surface . Wear a life jacket and we always take some long rope tied to the truck . I carry all the gear on a plastic kids sled and pull it to each hole . Dress in layers and take breaks in the truck to warm up . Really wish I had some tip-up's !