With a crew of more than 200 construction workers, Amazon is turning most of a 157-acre property on the Naugatuck-Waterbury line into what will be one of its biggest distribution centers in the state.

While most people are asleep, nearly 2,000 workers are busy inside Amazon’s TYS1 fulfillment center in Alcoa, ensuring packages are processed and ready for delivery. The TYS1 facility is Amazon’s ...