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• United States Code
• TITLE 33 - NAVIGATION AND NAVIGABLE WATERS
• CHAPTER 9 - PROTECTION OF NAVIGABLE WATERS AND OF HARBOR AND RIVER IMPROVEMENTS GENERALLY
• SUBCHAPTER I - IN GENERAL

    (a) Definition of Great Lake
      In this section, the term "Great Lake" means Lake Superior, Lake
    Michigan, Lake Huron (including Lake St. Clair), Lake Erie, and
    Lake Ontario (including the St. Lawrence River to the 45th parallel
    of latitude).
    (b) Dredging levels
      In operating and maintaining Federal channels and harbors of, and
    the connecting channels between, the Great Lakes, the Secretary
    shall conduct such dredging as is necessary to ensure minimal
    operation depths consistent with the original authorized depths of
    the channels and harbors when water levels in the Great Lakes are,
    or are forecast to be, below the International Great Lakes Datum of
    1985.