Seaonus Stevedoring laid off a number of its employees this week as its parent company, Diversified Port Holdings, is combined with a sister business, Patriot Rail Company LLC. SteelRiver Infrastructure Partners, an independent investment firm, owns both DPH and Patriot Rail and decided to combine the two entities, DPH Chief Commercial Officer Charles Tillotson told the Business Journal. DPH also owns Portus, which is also a stevedoring company. It is unclear if layoffs are also hitting that company. It...