Okay kiddo, so do you know what a power plant is? It's like a giant machine that makes electricity for our homes and schools and stuff. The Kingston Fossil Plant is one of those power plants, and it's in Tennessee.
Now, this power plant uses something called coal to make electricity. Coal is a type of rock that we dig up from the ground, and it's really good at making heat. But when we burn coal to make heat, it also creates something else called ash.
Ash is kind of like sandy dirt, and power plants have to get rid of it because it can be bad for the environment. At the Kingston plant, they had a lot of this ash, so they would mix it with water to make it easier to move around.
One day in 2008, there was a really big accident at the Kingston plant. A bunch of this ash and water mixture spilled out and made a huge mess. It was like a giant mudslide!
It was a big problem because this mixture had a lot of chemicals in it that could be bad for people and animals. The spill was so big that it got into nearby rivers and land.
Scientists and engineers had to work really hard to try and clean up the mess and make sure that it didn't hurt anyone or the environment too much. It was a really tough situation, but thankfully they were able to make things better in the end.