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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 The site also has Policy Notices that remain in place until superseded.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
211005TEMPORARY RESTRICTED AREA ST. MARYS FALLS CANAL2025/06/272025/06/27DETROIT DISTRICT
210785OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2025/06/042025/06/05DETROIT DISTRICT
210832ICE CONTROL BOOMS COURSE 2, LITTLE RAPIDS CHANNEL ST. MARYS RIVER 2025/05/202026/01/26DETROIT DISTRICT
210726REPORTED SHOALING - LEXINGTON HARBOR, MI2025/05/09UNTIL FURTHER NOTICEDETROIT DISTRICTLE_01_XTN_20250407_CS.pdf
210705OPERATIONAL STATUS – SOO LOCKS EAST APPROACH NORTH CANAL OBSTRUCTION2025/05/082026/01/16DETROIT DISTRICTNTNI L25-09 Chartlet - Lower Approach Obstruction.pdf
210608OPERATIONAL STATUS - SOO LOCKS WEST APPROACH NORTH CANAL OBSTRUCTION2025/04/282026/01/16DETROIT DISTRICTNTNI L25-04 Chartlet - Upper Approach Obstruction.pdf
210609OPERATIONAL STATUS – SOO LOCKS HYDROELECTRIC POWER PLANT TAILRACE CLOSURE2025/04/282100/01/01DETROIT DISTRICTNTNI L25-05 Chartlet - Tailrace Closure.pdf
210610OPERATIONAL STATUS – SOO LOCKS WEST APPROACH NORTH CANAL OBSTRUCTION2025/04/282026/01/16DETROIT DISTRICTNTNI L25-04 Chartlet - Upper Approach Obstruction.pdf
210611 OPERATIONAL STATUS – SOO LOCKS EAST APPROACH NORTH CANAL CLOSURE 2025/04/282026/01/16DETROIT DISTRICTNTNI L25-06 Chartlet - Lower Approach Closure.pdf
210612OPERATIONAL STATUS – SOO LOCKS WEST APPROACH NORTH CANAL CLOSURE AND SOUTH CANAL WORK AREAS2025/04/28UNTIL FURTHER NOTICEDETROIT DISTRICTNTNI L25-07 Chartlet - Upper Approach Closure.pdf
210613210611-1 OPERATIONAL STATUS – SOO LOCKS EAST APPROACH NORTH CANAL CLOSURE 2025/04/282026/01/16DETROIT DISTRICTNTNI L25-06 Chartlet - Lower Approach Closure.pdf
210615210612-1OPERATIONAL STATUS – SOO LOCKS WEST APPROACH NORTH CANAL CLOSURE AND SOUTH CANAL WORK AREAS2025/04/282026/01/16DETROIT DISTRICTNTNI L25-07 Chartlet - Upper Approach Closure.pdf
210584REPORTED SHOALING CASEVILLE HARBOR, MI2025/04/25UNTIL FURTHER NOTICEDETROIT DISTRICTCS_01_EVL_20250423_CS.pdf
210585210584-1REPORTED SHOALING CASEVILLE HARBOR, MI2025/04/25UNTIL FURTHER NOTICEDETROIT DISTRICTCS_01_EVL_20250423_CS.pdf
210487OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2025/04/17UNTIL FURTHER NOTICEDETROIT DISTRICT
210680210487-1OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2025/04/172026/01/16DETROIT DISTRICT
210106OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2025/03/212026/01/16DETROIT DISTRICT
209444SOO LOCKS – NEW LOCK CONSTRUCTION EXPLOSIVE DEMOLITION2025/02/012025/03/21DETROIT DISTRICTLetter No. S-0099  - S-0099 - Attachment - Blasting Exclusion Zone Map.pdf
208785OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2024/12/162025/01/16DETROIT DISTRICT
208549ICE CONTROL BOOMS, COURSE 2, LITTLE RAPIDS CHANNEL ST. MARYS RIVER2024/11/122025/05/01DETROIT DISTRICTAttachment NOV2024 -ICE_CONTROL_BOOMS_ST_MARYS_RIVER_MI.pdf
208550208549-1ICE CONTROL BOOMS, COURSE 2, LITTLE RAPIDS CHANNEL ST. MARYS RIVER2024/11/122025/05/01DETROIT DISTRICTAttachment NOV2024 -ICE_CONTROL_BOOMS_ST_MARYS_RIVER_MI.pdf
208024OBSTRUCTION – SOO LOCKS NORTH CANAL WEST APPROACH TURBIDITY CURTAIN2024/09/102025/01/16DETROIT DISTRICTNTNI_24 Turbidity Curtains_Upper Approach.pdf
206984ICE CONTROL BOOMS, COURSE 2, LITTLE RAPIDS CHANNEL ST. MARYS RIVER2024/05/10UNTIL FURTHER NOTICEDETROIT DISTRICT
206975SHOALING REPORTED - PORT WING HARBOR, WI2024/05/08UNTIL FURTHER NOTICEDETROIT DISTRICTPT_01_WNG_20240410_CS.pdf
210683206984-1ICE CONTROL BOOMS, COURSE 2, LITTLE RAPIDS CHANNEL ST. MARYS RIVER2024/05/012024/05/02DETROIT DISTRICT
206860OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2024/04/25UNTIL FURTHER NOTICEDETROIT DISTRICT
209367206860-1OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2024/04/252025/01/16DETROIT DISTRICT
206834REPORTED SHOALING – MANISTEE HARBOR, MI2024/04/23UNTIL FURTHER NOTICEDETROIT DISTRICTMA_01_MAN_20240419_CS.pdf
210679206834-1REPORTED SHOALING – MANISTEE HARBOR, MI2024/04/232025/05/23DETROIT DISTRICTMA_01_MAN_20240419_CS.pdf
206432OPERATIONAL STATUS – SOO LOCKS HYDROELECTRIC POWER PLANT TAILRACE CLOSURE2024/04/012025/01/16DETROIT DISTRICTL24-05_US Government Power Plant Tailrace Closure.pdf
206429OPERATIONAL STATUS – SOO LOCKS WEST APPROACH NORTH CANAL CLOSURE AND SOUTH CANAL WORK AREAS2024/03/252025/01/16DETROIT DISTRICTL24-02_North Canal West Approach Closure.pdf
206430OPERATIONAL STATUS – SOO LOCKS NORTH CANAL EAST APPROACH CLOSURE2024/03/252025/01/16DETROIT DISTRICTL24-03_North Canal East Approach Closure.pdf
206431OBSTRUCTION – SOO LOCKS NORTH CANAL EAST APPROACH – TURBIDITY CURTAIN2024/03/252025/01/16DETROIT DISTRICTL24-04_North Canal East Approach Obstruction.pdf
206302OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL 2024/03/06UNTIL FURTHER NOTICEDETROIT DISTRICT
209368206302-1OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL 2024/03/062025/01/16DETROIT DISTRICT
205446OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2023/12/17UNTIL FURTHER NOTICEDETROIT DISTRICT
209370205446-1OPERATIONAL STATUS – POE AND MACARTHUR LOCKS ST. MARYS FALLS CANAL2023/12/172024/03/25DETROIT DISTRICT
205286UPDATED REPORTED SHOALING - LITTLE LAKE HARBOR, MI2023/10/20UNTIL FURTHER NOTICEDETROIT DISTRICT
210669205286-1UPDATED REPORTED SHOALING - LITTLE LAKE HARBOR, MI2023/10/202024/10/17DETROIT DISTRICT
202892REPORTED SHOALING – ARCADIA HARBOR, MI2023/06/22UNTIL FURTHER NOTICEARCADIA HARBOR, MIDETROIT DISTRICTAC_01_DIA_20230601_BD.pdf
202894202892-1REPORTED SHOALING – ARCADIA HARBOR, MI2023/06/22UNTIL FURTHER NOTICEARCADIA HARBOR, MIDETROIT DISTRICTAC_01_DIA_20230601_BD.pdf
202895REPORTED SHOALING – BLACK RIVER, UPPER PENINSULA, MI2023/06/22UNTIL FURTHER NOTICEBLACK RIVER, MI (UPPER PENINSULA)DETROIT DISTRICTBK_01_RIV_20230601_CS.pdf
206976202895-1REPORTED SHOALING – BLACK RIVER, UPPER PENINSULA, MI2023/06/22UNTIL FURTHER NOTICEDETROIT DISTRICTBK_01_RIV_20240502_CS.pdf
210678202892-1REPORTED SHOALING – ARCADIA HARBOR, MI2023/06/222025/07/05DETROIT DISTRICTAC_01_DIA_20230601_BD.pdf
210681202895-2REPORTED SHOALING – BLACK RIVER, UPPER PENINSULA, MI2023/06/222024/05/01DETROIT DISTRICTBK_01_RIV_20240502_CS.pdf
210682202892-2REPORTED SHOALING – ARCADIA HARBOR, MI2023/06/222025/07/04DETROIT DISTRICTAC_01_DIA_20230601_BD.pdf
202496202431-2OPERATIONAL STATUS – RESCINDING POE LOCK CONSTRUCTION LOGISTICS CLOSURE2023/04/12UNTIL FURTHER NOTICEST. MARYS RIVERDETROIT DISTRICT
210677202431-3OPERATIONAL STATUS – RESCINDING POE LOCK CONSTRUCTION LOGISTICS CLOSURE2023/04/122023/04/19DETROIT DISTRICT
202494REPORTED SHOALING – HOLLAND HARBOR, MI2023/04/11UNTIL FURTHER NOTICEHOLLAND HARBORDETROIT DISTRICTHO_01_LND_2023_BD.pdf
210676202494-1REPORTED SHOALING – HOLLAND HARBOR, MI2023/04/112025/05/09DETROIT DISTRICTHO_01_LND_2023_BD.pdf
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