Amazon says it will spend $20 billion on two data center complexes in Pennsylvania, including one it is building alongside a nuclear power plant that has drawn federal scrutiny.

Amazon plans to invest at least $20 billion in the construction of multiple data center complexes in Pennsylvania, marking what officials called the largest private sector investment in the state’s history.

Amazon said Monday that it will spend $20 billion on two data center complexes in Pennsylvania, including one it is building alongside a nuclear power plant that has drawn federal scrutiny over an arrangement to essentially plug right into the power plant.