Broke a Blade on Hidden Bolt in Old Walnut

We hired a modern bandmill! Log pile gave us 2 walnuts, 1 hickory, & 4 white oaks all but 1 were 30" D or greater. We produced some beautiful lumber using a Norwood HD136 but busted some blades & guides hitting nails, wire, bolt and rocks. This was a long day but you will see it was worth it! Note: The white oaks died in 2013. You can see them in "Handling A Tree Top Fire". The walnut came from the Rocking S Seelbach ranch and you can see them in "Milling Lightning Struck Walnut". The hickory came from my mom's yard. Used tractor grapple, chainsaw, Foley Belsaw M-14 circle sawmill. Triple T Ranch & Sawmill on Choctaw Ridge is homesteading with a sawmill & anvil.