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2018 Great Lakes-St. Lawrence Seaway Economic Impact Study

Contact the SLSDC

Saint Lawrence Seaway Development Corporation (SLSDC)
Policy Headquarters
U.S. Department of Transportation
1200 New Jersey Ave, SE
Washington, DC 20590
United States
Phone: 202-366-0091
Alt: 800-785-2779
Fax: 202-366-7147
Business Hours:
8:00am-5:00 pm ET, M-F


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