Constellation (NASDAQ:CEG) and Amazon (NASDAQ:AMZN) today announced a long-term agreement that will support the continued investment in and expansion of the Calvert Cliffs Clean Energy Center, Maryland’s only nuclear plant and largest source of clean energy. The agreement will enable more than $3 billion in Maryland infrastructure investment, including state-of-the-art improvements across the entire 1,790-megawatt plant and approximately 190 megawatts in total of new, emissions-free generating capacity coming online between 2030 and 2032.

The expansion of Calvert Cliffs’ generating capacity will be supported by a 20-year agreement, which includes 690 megawatts of power, including the 190 megawatt uprate. The parties have also entered into a related retail supply agreement to support Amazon operations in the 13-state PJM market. In addition to making the uprate possible, Amazon’s long-term commitment will help provide Constellation with the revenue certainty to relicense the plant for another 20 years and make progress toward the development of new clean energy power plants at the site, adding to Maryland’s supply of clean and reliable energy.