DREDGE NUMBER FOUR NATIONAL HISTORIC SITE OF CANADA

Stranded just below Bonanza Creek, it was built in 1912. This eight-storey, electrically powered, infernal machine moved like a bulimic beetle as its buckets dug through the ground to extract gravel and precious metal. Inside this extractor, a wash-house sorted gravel and gold. Active until 1960, it changed sites several times and on some concessions up to 22 kg of gold per day was extracted.