摘要: |
Safe, reliable navigation on Great Lakes harbors and connecting channels has defined the North American mid-continent???s economic development, and remains critical to job growth and investment in those areas today. Without regular navigation access to some 60 deep-draft commercial ports that require maintenance by periodic dredging, the Great Lakes states would not be able to sustain core industries such as steel-making, mining, heavy manufacturing, agribusiness and power generation. An average of over 300 million tons of cargo move on the Great Lakes St. Lawrence Seaway system annually. |