The biggest problem that TGD has is the south dam.
It is a compacted earth dam, which means it's made of soil.
As the TGD discharges, it causes vibrations in the dam itself, and also in the lands around it.
Those vibrations will cause the earth dam to liquefy, where " Soil liquefaction , ground failure or loss of strength that causes otherwise solid soil to behave temporarily as a viscous liquid."
The Bugmen have it coming