On Oct. 31, a landslide at the Wisconsin-based We Energies Oak Creek Power Plant sent piles of coal ash, along with dredging equipment and debris, into Lake Michigan. Thankfully, there were no injuries, but the incident is reminiscent of the disastrous 2008 coal ash spill in Kingston, TN – where a failed impoundment released 5.4 million cubic yards of coal ash that buried a community and severely contaminated a nearby river – and raises concerns about how to regulate the storage and disposal of coal ash.