The "Yard 8" that @F-Line to Dudley references above is the new track and the tiny container loading platform that MaineDOT built a few years ago, between Commercial and the new cold storage warehouse, in conjunction with Eimskip's arrival in Portland. As he observes, it hasn't gotten much use. (as an aside - has *anyone* here ever seen that platform used to actually load/unload train cars?)
Historically, Yard 8 was a much bigger waterfront yard that stretched from Cassidy Point to the old Million Dollar Bridge – it's labelled on this mid-20th century map of the Portland Terminal Company's yards:
Historically, Yard 8 was a much bigger waterfront yard that stretched from Cassidy Point to the old Million Dollar Bridge – it's labelled on this mid-20th century map of the Portland Terminal Company's yards: