 They were also thought to congest and limit redevelopment of the northern portion of Miami's Central Business District.The Port of Miami Tunnel includes providing a direct connection from the Port of Miami to highways via Watson Island to I-395 and, along with the deep dredge, keeping the Port of Miami, the County's second largest economic generator (after Miami International Airport), supporting over 11,000 jobs directly with an average salary of $50,000, a competitive player in international trade.The Port of Miami provides 176,000 jobs, $6.4 billion in wages and $17 billion in economic output.