The dam covering what used to be its football pitch fill up with millions of tons of poisonous mining waste.
The dam is filling up with byproducts of nuclear power generation.
( z1 fill-up :ARG1 ( z2 dam ) :ARG2 ( z3 byproduct :source ( z4 generate :ARG1 ( z5 power :mod ( z6 nucleus ) ) ) ) )