In the 1950’s through the 1980’s quite alot of lead ore was mined in the Yukon and moved by train to Skagway. It was then unloaded onto barges. In those years, the effect of lead contamination was not known, hence you see the Skagway longshoremen above moving cloth bags of lead and zinc ore by hand onto pallets in the hold of a ship. No gloves, respirators, or other safety equipment.
photo taken in 1952 by Paul Sincic