For kids like Sandy Mitchell, Ted Theis and Janet Johnson, childhood in the North St. Louis County suburbs in the 1960s and ‘70s meant days playing along the banks or splashing in the knee-deep waters of Coldwater Creek.

They caught turtles and tadpoles, jumped into deep stretches of the creek from rope swings and ate mulberries that grew on the banks.

Their families — along with tens of thousands of others — flocked to the burgeoning suburbs and new ranch style homes built in Florissant, Hazelwood and other communities shortly after World War II. When the creek flooded, as it often did, so did their basements. They went to nearby Jana Elementary School and hiked and biked throughout Fort Belle Fontaine Park.

Growing up, they never knew they were surrounded by massive piles of nuclear waste left over from the war.

Generations of children who grew up alongside Coldwater Creek have, in recent decades, faced rare cancers, autoimmune disorders and other mysterious illnesses they have come to believe were the result of exposure to its waters and sediment.

“People in our neighborhood are dropping like flies,” Mitchell said.