Sluice Boxes and Kate Kate for scale. Powder that passed the floatation level was flowed over sluice tables, another mass-based way of separating gold. I’ve never seen so many of these in one place. Though it was a hardrock mine, it worked more like a placer mine. Similar Images ...based on the tags: HDR, machinery, people, quarantine, sluice... C’mon, guys. PIck up to trash. New friends met at the exploring expo. Ava between ammo warehouses and railroads. Where the drain changes shape from round concrete to arched brick. Like looking out of an airship. As my friend Jonathan would say, “on a human scale.” There is a cool old air compressor in the corner of the powerhouse. Chicago looks in as we look out, for holes and trolls where anything goes. The turbine hall, without turbines. I guess that makes this a hall… at least it has a clock.