Irving Oil announced plans Thursday for a major maintenance project at its 313,000-barrel-per-day refinery in Saint John, New Brunswick, that it said is the largest in its history.

The $200 million project, dubbed Operation Falcon, will begin Sept. 16 and last 60 days, the company said Thursday.

The work, reported by Reuters in June, will require the full shutdown of all of the refinery’s processing units, and involve heavy maintenance to repair the larger of its two gasoline-making fluid catalytic cracker units, sources have told Reuters.

The refinery is a major supplier of gasoline to the northeastern United States.

The project will require 3,000 workers, including full-time staff at the refinery.

“This is more than an investment in the refinery, it is an investment in our people and our region, and it signals Irving Oil’s long-term commitment to the economic future of Saint John, New Brunswick, and the rest of Atlantic Canada,” Ian Whitcomb, president of Irving Oil, said.