Developers of a new $1 billion container terminal at Tradepoint Atlantic in Baltimore County say they expect to break ground by the end of next year and open in 2028, creating 1,100 jobs. But much of that timeline depends on navigating a complex government permitting process and resolving environmental issues, such as how to safely dispose of dredge material. On Tuesday, the developers of Tradepoint Atlantic, a logistics hub on the former site of Bethlehem Steel in Sparrows Point, discussed their vision with federal officials from an agency that works to keep major infrastructure projects from getting tangled in red tape.