I have a spot on lake Ontario that had a beach house built in 1916 and closed in the 60's. It was torn down but an area people still swim at. Strong lake current cut it down in that summer near clay or to the clay. 80 yards by about 20. There were also tracks that went by the lake from 1870's to 1970's.They built a tunnel under tracks to get swimmers to lake.All that left was mostly heavy objects because of currents.There were many RR ties and big iron and nails in spots. On June 30 of 2018 with AT gold and its stock coil I got 19 quarters,18dimes,22 nickles,36 pennies.My record for gold for a day at 6 with 2 ob hallmark rings.2 silver jewelry,5 other rings, brass bangle, 3 silver plated spoons and a fork,some buttons and other jewelry,brass buckles,A very rare American lock co. key from Cazenovia,N. Y.,1 silver Rosie, 3 V nickles,1 buffalo nickel,and 10 weaties in a 10 hour hunt.It can be done in the right conditions.I then got my nox and with this machine this spot still produced.