
Uranium processing in the St. Louis area played a pivotal role in developing the nuclear weapons that helped bring an end to World War II and provided a key defense during the Cold War. But the cost to the region has been staggering.
Eight decades after Mallinckrodt Chemical Works first began the dangerous task of processing uranium at a sprawling complex near downtown St. Louis, the federal government is still removing soil from a creek and cleaning up a landfill — nuclear contamination sites. Last year, a grade school closed amid worries that contamination from the creek got onto the playground and inside the building.