to dream back in time In 1909, excitement again stirred for Big Thunder when the Columbia Mine was opened. The Columbia Mine was located on the property adjacent to the back half of the Big Thunder property. Ore from the Columbia was averaging over two ounces of gold per ton with some rich pockets running as high as 10 ounces per ton. It was found that the Columbia vein ran parallel to the Lucky Boy vein and continued toward Big Thunder. Knowing the Columbia vein might intersect the Big Thunder property, it was time to ~lengthen the Big Thunder adit.