The 485-megawatt plant went online roughly a month ago, providing energy to thousands of homes and businesses throughout the state. It also set in motion plans to retire PSEG’s longstanding coal plant next door, which officials say is scheduled for June 2021. Monday was the official opening. That includes PSEG’s $600,000 Ready2Work program which helped train and place 47 residents a trades union or career where the certifications created by the program were required. Graduates of the program were also among the 700 construction workers that built the power plant.