In October 2000, an estimated 300 million gallons of toxic waste — including heavy metals like arsenic and mercury — flowed into Martin County’s river system. Here, the remains of a coal sediment pond that collapsed near Inez.

In October 2000, an estimated 300 million gallons of toxic waste — including heavy metals like arsenic and mercury — flowed into Martin County’s river system. Here, the remains of a coal sediment pond that collapsed near I