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Welcome to Notices To Navigation Interest

The Notices To Navigation Interests (NTNI Notices) website contains navigation notices and policies issued by US Army Corps of Engineers Districts with a waterway navigation mission. These documents are disseminated according to EP 1130-2-520, Chapter 2, to inform mariners of information describing events that affect waterway navigation such as maintenance projects, hazards to navigation, and other pertinent information. The notices are removed from the page seven days past the end date on the latest amendment. The site also has Policy Notices that remain in place until superseded. This site does not contain all notices such as those published by other Federal agencies. Reference: The US Coast Guard Local Notice To Mariners site at: http://www.navcen.uscg.gov/?pageName=lnmMain
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Navigation Notices

Control NbrAmendment NbrTitleBegin DateEnd DateWaterwaysDistrict NameAttachments
211568Lock Closure Lockport Lock River Mile 2912026/03/312026/05/20CHICAGO DISTRICT
212043Lock Closure Chicago Harbor Lock2025/11/032025/11/07CHICAGO DISTRICT
211788Lock Closure Chicago Harbor Lock2025/09/032025/09/03CHICAGO DISTRICT
211730Lock Closure Chicago Harbor Lock2025/08/282025/08/29CHICAGO DISTRICT
211769211730-1Lock Closure Chicago Harbor Lock2025/08/282025/08/28CHICAGO DISTRICT
211688Lock Closure Chicago Harbor Lock2025/08/242025/08/25CHICAGO DISTRICT
211707211688-1CANCELLED - Lock Closure Chicago Harbor Lock2025/08/242025/08/24CHICAGO DISTRICT
210893Lock Closure T.J. O’Brien Lock & Dam, River Mile 326.52025/08/192025/08/19CHICAGO DISTRICT
211633Lock Closure Chicago Harbor Lock2025/08/192025/08/20CHICAGO DISTRICT
211628Lock Restriction – Single Gate Operation Chicago Harbor Lock2025/08/13UNTIL FURTHER NOTICECHICAGO DISTRICT
211732211628-1Lock Restriction – Single Gate Operation Chicago Harbor Lock2025/08/13UNTIL FURTHER NOTICECHICAGO DISTRICT
211770211628-2Lock Restriction – Single Gate Operation Chicago Harbor Lock2025/08/13UNTIL FURTHER NOTICECHICAGO DISTRICT
211833211628-3Lock Restriction – Single Gate Operation Chicago Harbor Lock2025/08/132025/09/03CHICAGO DISTRICT
210606Calumet Harbor Breakwater Repair2025/07/302025/09/12CHICAGO DISTRICT
210894210606-1Calumet Harbor Breakwater Repair2025/07/302025/09/12CHICAGO DISTRICT
210604Chicago Harbor Southerly Extension Detached Breakwater Repair2025/06/232025/07/23CHICAGO DISTRICT
210895210604-1Chicago Harbor Southerly Extension Detached Breakwater Repair2025/06/232025/07/23CHICAGO DISTRICT
211010Lock Closure T.J. O’Brien Lock & Dam River Mile 326.52025/06/182025/06/18CHICAGO DISTRICT
210876Maintenance Dredging Update Michigan City Harbor, Michigan City, Indiana2025/05/30UNTIL FURTHER NOTICECHICAGO DISTRICT
210812210730-2Maintenance Dredging, Waukegan Harbor Approach Channel and Advanced Maintenance Area, Waukegan, Illinois2025/05/252025/06/30CHICAGO DISTRICT
210820210730-3Maintenance Dredging, Waukegan Harbor Approach Channel and Advanced Maintenance Area, Waukegan, Illinois2025/05/252025/06/30CHICAGO DISTRICT
210730Maintenance Dredging, Waukegan Harbor Approach Channel and Advanced Maintenance Area, Waukegan, Illinois2025/05/142025/06/30CHICAGO DISTRICT
210807210730-1Maintenance Dredging, Waukegan Harbor Approach Channel and Advanced Maintenance Area, Waukegan, Illinois2025/05/142025/06/30CHICAGO DISTRICT
210528Chicago Harbor Lock Piezometer Installation 2025/04/292025/05/01CHICAGO DISTRICT
210469Milwaukee Harbor South Detached Breakwater Repair2025/04/112025/06/20CHICAGO DISTRICT
210529210469-1Milwaukee Harbor South Detached Breakwater Repair2025/04/112025/06/20CHICAGO DISTRICT
210428Chicago Harbor Lock Reopened to Navigation Traffic2025/04/102025/04/14CHICAGO DISTRICT
210368210207-2Maintenance Dredging, Michigan City Harbor, Michigan City, Indiana2025/04/072025/05/30CHICAGO DISTRICT
210124Operational Restrictions Lockport Lock and Dam2025/04/04UNTIL FURTHER NOTICECHICAGO DISTRICT
210207Maintenance Dredging, Michigan City Harbor, Michigan City, Indiana2025/04/012025/05/01CHICAGO DISTRICT
210367210207-1Maintenance Dredging, Michigan City Harbor, Michigan City, Indiana2025/04/012025/05/01CHICAGO DISTRICT
208667206022-1Lock Closure Lockport Lock2025/01/282025/03/25CHICAGO DISTRICT
210044206022-2Lock Closure Lockport Lock2025/01/282025/04/04CHICAGO DISTRICT
210045206022-3Lock Closure Lockport Lock2025/01/282025/04/04CHICAGO DISTRICT
206022Lock Closure Lockport Lock2025/01/142025/03/11CHICAGO DISTRICT
208584Maintenance Dredging, Burns Small Boat Harbor, Portage, Indiana2024/10/292024/12/15CHICAGO DISTRICT
208488Lock Closure Lockport Lock2024/10/282024/10/28CHICAGO DISTRICT
207742Maintenance Dredging, Indiana Harbor and Canal, Indiana2024/08/222024/11/16CHICAGO DISTRICT
207583SHOALING REPORTED - Waukegan Harbor, Illinois2024/07/26UNTIL FURTHER NOTICECHICAGO DISTRICTLC_01_WKH_20240419_CS_10.PDF
207592207583-1SHOALING REPORTED - Waukegan Harbor, Illinois2024/07/26UNTIL FURTHER NOTICECHICAGO DISTRICT
206955Obstruction to Navigation Indiana Harbor and Canal2024/05/06UNTIL FURTHER NOTICECHICAGO DISTRICTColor Intensity Image of Obstruction.pdf
LC_06_INH_20240411_CS_10 8.pdf
205287Maintenance Dredging Milwaukee Harbor, Wisconsin 2023/10/272024/01/01CHICAGO DISTRICT
13968ANTICIPATED CLOSURES Chicago Harbor Lock Chicago River Mile 3272021/04/262025/04/15CHICAGO HARBORCHICAGO DISTRICT
20894613968-1ANTICIPATED CLOSURES Chicago Harbor Lock Chicago River Mile 3272021/04/262027/04/15CHICAGO DISTRICT
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