Delmarva Corrugated Packaging recently showed off its $90 million high-tech manufacturing facility in Dover that makes state-of-the-art packaging and has created jobs for 160 people. During its “open the box” event, it also announced a new solar panel project and a partnership with Autism Delaware. The  465,000-square-foot, rail-served facility is  located on a 37.4-acre site at 1601 POW/MIA Parkway and …