Notice to Navigators: Great Lakes


LNM 41-21



This section contains information of general concern to the Mariners. Mariners are advised to use caution while transiting these areas.


LAKE ERIE – OH – Toledo Harbor – Chart 14847

From 20 Oct to 25 Dec Ryba Marine Construction Co. will be conducting maintenance dredging in the Maumee River 24 hours/7 days a week. The Tug Kristin Joelle and Tug Kathy Lynn can be contacted on VHF channels 10, 16, and 19. All mariners are requested to transit the area with caution.


LAKE MICHIGAN – IL – Chicago Sanitary and Ship Canal – Chart 14972

From 15 Nov to 19 Nov the Army Corp of Engineers will be conducting diving operations to inspect the underwater components of the electric barriers operated by the Corps in the Chicago Sanitary and Ship Canal between Mile Marker 296 and 296.7 from 0700-1100 and 1300-1700 every day. Entry into, transiting, mooring, laying up, or anchoring with this safety zone is prohibited unless authorized by the Captain if the Port, Lake Michigan or a designated representative.