US Coast Guard LNM - Great Lakes District (D9) archive
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- LAKE MICHIGAN - CALUMET General / Bridges / Rehabilitation *****REVISED***** IL - LAKE MICHIGAN – Calumet Harbor From March 1, through March 7, 2027, the 92nd Street Bridge at mile 0.76 (CORPS MILE 332.4) and the 100th Street Bridge at mile 1.78 (CORPS MILE 331.4) over the Calumet River will be secured to masted navigation for removal. Vessels able to pass under the bridge without an opening may do so at any time. A barge will remain under one leaf to accommodate the removal of that leaf. From February 21, through March 11, 2028, the 92nd Street Bridge at mile 0.76 (CORPS MILE 332.4) and the 100th Street Bridge at mile 1.78 (CORPS MILE 331.4) over the Calumet River will be secured to masted navigation as the new bridge leaf is being installed. A barge will remain under the new leaf until it is fully connected. A 48-hour break will be provided near the middle of the three-week project to accommodate commercial traffic; this will be coordinated through weekly TEAMS meetings hosted by the U.S. Coast Guard and the contractor to be announced in January 2028 through the Local Notice to mariners and the Bridge Maintenance and Activities List. From March 1, through March 7, 2029, the 95th Street Bridge at mile 1.09 (CORPS MILE 332.1) and the 106th Street Bridge at mile 2.58 (CORPS MILE 330.6) over the Calumet River will be secured to masted navigation for removal. Vessels able to pass under the bridge without an opening may do so at any time. A barge will remain under one leaf to accommodate the removal of that leaf. From February 21, through March 15, 2030, the 95th Street Bridge at mile 1.09 (CORPS MILE 332.1) and the 106th Street Bridge at mile 2.58 (CORPS MILE 330.6) over the Calumet River will be secured to masted navigation as the new bridge leaf is being installed. A barge will remain under the new leaf until it is fully connected. A 48-hour break will be provided near the middle of the three-week project to accommodate commercial traffic; this will be coordinated through weekly TEAMS meetings hosted by the U.S. Coast Guard and the contractor to be announced in January 2030 through the Local Notice to mariners and the Bridge Maintenance and Activities List. The Contractor will temporarily light any reduction in vertical or horizontal clearances with steady burning yellow lights until the regular bridge navigation lights can be established. [20MAY26] [27MAY26] Position 41-42.17N 087-32.75W USCG Great Lakes District Local Notice to Mariners 44/2026
- LNM09-6CCD3CSÉCURITÉLAKE HURON - LAKE MICHIGAN General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes General/Marine Construction (Excluding Bridges)/Facilities, Barriers, Manmade Reefs, Riprap, Jetties/Dikes Chicago Underwater, LLC will be conducting commercial diving operations in Lake Michigan near Chicago (Lakefront Trail area) at approximate position 41°50.77'N, 087°36.21'W (41-50.77N 087-36.21W). Operations will take place from November 6, 2026, through November 11, 2026, between the hours of 0700 and 1700, Monday through Friday. The support vessel LC-34 will be on scene monitoring VHF-FM Channel 16. The vessel will be flying the International Code Flag "Alpha" and a "Diver Down" flag when operations are underway. Mariners are requested to maintain a minimum safe distance of 300 feet from the vessel, pass at slow/no-wake speed, and exercise extreme caution when transiting the area. For further information or questions regarding operations, contact Jim Rolette at (708) 752-1675. Position 41-50.80N 087-36.37W USCG Great Lakes District Local Notice to Mariners 44/2026
- LAKE MICHIGAN - CALUMET General / Bridges / Rehabilitation Location: 41-42.83N 087-32.55W Bridge Name: 100th St Bridge Valid 2026-05-27 to 2030-03-17. USCG Great Lakes District Local Notice to Mariners 44/2026
- ST. LAWRENCE SEAWAY - LAKE AMERICA General / Bridges / Maintenance NY - NEW YORK STATE CANAL SYSTEM - Erie Canal From October 19 through November 9, 2026, between the hours of 0700 and 1600, Monday through Friday, a shore-based lift will be working on the E194 Transit Road Bridge at Mile 289.15 over the Erie Canal. Spotters will warn of approaching vessels and move the man lift to allow vessels to pass. [15OCT26] Position 43-10.07N 078-41.82W USCG Great Lakes District Local Notice to Mariners 44/2026
- BIG TRAVERSE BAY General / Miscellaneous Location: Lake of the Woods Description: The Coast Guard will be decommissioning the seasonal buoys in Lake of the Woods and Baudette significantly earlier than their advertised Light List dates. Mariners are urged to used caution while transiting these areas. Valid 2026-09-23 to 2026-11-07. USCG Great Lakes District Local Notice to Mariners 44/2026
- LAKE MICHIGAN - CALUMET General / Bridges / Rehabilitation *****REVISED***** IL - LAKE MICHIGAN – Calumet Harbor From March 1, through March 7, 2027, the 92nd Street Bridge at mile 0.76 (CORPS MILE 332.4) and the 100th Street Bridge at mile 1.78 (CORPS MILE 331.4) over the Calumet River will be secured to masted navigation for removal. Vessels able to pass under the bridge without an opening may do so at any time. A barge will remain under one leaf to accommodate the removal of that leaf. From February 21, through March 11, 2028, the 92nd Street Bridge at mile 0.76 (CORPS MILE 332.4) and the 100th Street Bridge at mile 1.78 (CORPS MILE 331.4) over the Calumet River will be secured to masted navigation as the new bridge leaf is being installed. A barge will remain under the new leaf until it is fully connected. A 48-hour break will be provided near the middle of the three-week project to accommodate commercial traffic; this will be coordinated through weekly TEAMS meetings hosted by the U.S. Coast Guard and the contractor to be announced in January 2028 through the Local Notice to mariners and the Bridge Maintenance and Activities List. From March 1, through March 7, 2029, the 95th Street Bridge at mile 1.09 (CORPS MILE 332.1) and the 106th Street Bridge at mile 2.58 (CORPS MILE 330.6) over the Calumet River will be secured to masted navigation for removal. Vessels able to pass under the bridge without an opening may do so at any time. A barge will remain under one leaf to accommodate the removal of that leaf. From February 21, through March 15, 2030, the 95th Street Bridge at mile 1.09 (CORPS MILE 332.1) and the 106th Street Bridge at mile 2.58 (CORPS MILE 330.6) over the Calumet River will be secured to masted navigation as the new bridge leaf is being installed. A barge will remain under the new leaf until it is fully connected. A 48-hour break will be provided near the middle of the three-week project to accommodate commercial traffic; this will be coordinated through weekly TEAMS meetings hosted by the U.S. Coast Guard and the contractor to be announced in January 2030 through the Local Notice to mariners and the Bridge Maintenance and Activities List. The Contractor will temporarily light any reduction in vertical or horizontal clearances with steady burning yellow lights until the regular bridge navigation lights can be established. [20MAY26] [27MAY26] Position 41-43.37N 087-32.58W USCG Great Lakes District Local Notice to Mariners 44/2026
- LAKE HURON - PRESQUE ISLE HARBOR General / Marine Events / Regatta (Race) Various yacht club races beginning and ending at Erie Yacht Club. Events occur weekdays from 6pm until 9pm and weekends from 9am until 9pm. USCG Great Lakes District Local Notice to Mariners 44/2026
- ST. LAWRENCE SEAWAY - LAKE ONTARIO General / Bridges / Inspection From June 10, 2026, through September 16, 2025, between the hours of 0700 and 1700, daily, a 30-foot Harcon will be inspecting all bridges from E-096 Lyons-MAR Road Bridge at Mile 217.76 to the E-212 Marshall Road Bridge at Mile 305.63 over the Erie Canal. The Harcon will monitor VHF-FM Marine Channel 16 and move to accommodate other vessels if a 15-minute advance notice is provided. USCG Great Lakes District Local Notice to Mariners 44/2026
- STURGEON BAY SHIP CANAL - STURGEON BAY SHIP CHANNEL General / Bridges / Maintenance WI - LAKE MICHIGAN – Sturgeon Bay From November 2 through November 4, 2026, between the hours of 0700 and 1600, the Bay View Bridge at Mile 3, over the Sturgeon Bay Ship Canal will be secure to masted navigation for maintenance. Vessel able to pass under the bridge without an opening may do so at any time. [15OCT26] Position 44-49.25N 087-21.33W USCG Great Lakes District Local Notice to Mariners 44/2026
- LNM09-D01889SÉCURITÉLAKE SUPERIOR General / Miscellaneous General/Miscellaneous The Michigan Department of Natural Resources (MIDNR) will conduct its annual fall lake trout survey in Lake Superior between Big Bay and Grand Island from October 19, 2026, through November 6, 2026. Operations will be conducted aboard the Research Vessel Lake Char. Survey operations involve deploying bottom-set gill nets approximately 1,200 feet in length, extending six feet from the lakebed, and remaining set overnight in waters generally under 100 feet deep within a few miles of shore. Net locations include waters off Big Bay Point, Salmon Trout Point, Garlic Island Reef, Yellow Dog Point, Thoney Point, Granite Island, Granite Point, Partridge Island Reef, Presque Isle Harbor, Wood Island, Wood Island Shoal, and Trout Point Reef. All nets are marked with black and orange flagged staff buoys labeled with agency identification. The R/V Lake Char will monitor VHF-FM Channel 16. Mariners are urged to navigate with caution and maintain a safe clearance from all flagged buoys and survey equipment. For questions or scheduling details, contact Fisheries Research Biologist Shawn P. Sitar at (906) 235-1581 or [email protected]. The vessel may also be contacted directly at (906) 458-6925. USCG Great Lakes District Local Notice to Mariners 44/2026
- LAKE MICHIGAN - CALUMET General / Bridges / Maintenance IL - LAKE MICHIGAN – Chicago Harbor On November 3 and November 5, 2026, between the hours of 0900 and 1430 the 95th Street Bridge at Mile 1.09 (CORPS MILE 332.1) over Calumet River will require a 30-minute advance notice for openings. Mariners should provide advance notice directly to the drawtender. [22OCT26] Position 41-43.37N 087-32.58W USCG Great Lakes District Local Notice to Mariners 44/2026
- LAKE MICHIGAN - CALUMET General / Bridges / Rehabilitation *****REVISED***** IL - LAKE MICHIGAN – Calumet Harbor From March 1, through March 7, 2027, the 92nd Street Bridge at mile 0.76 (CORPS MILE 332.4) and the 100th Street Bridge at mile 1.78 (CORPS MILE 331.4) over the Calumet River will be secured to masted navigation for removal. Vessels able to pass under the bridge without an opening may do so at any time. A barge will remain under one leaf to accommodate the removal of that leaf. From February 21, through March 11, 2028, the 92nd Street Bridge at mile 0.76 (CORPS MILE 332.4) and the 100th Street Bridge at mile 1.78 (CORPS MILE 331.4) over the Calumet River will be secured to masted navigation as the new bridge leaf is being installed. A barge will remain under the new leaf until it is fully connected. A 48-hour break will be provided near the middle of the three-week project to accommodate commercial traffic; this will be coordinated through weekly TEAMS meetings hosted by the U.S. Coast Guard and the contractor to be announced in January 2028 through the Local Notice to mariners and the Bridge Maintenance and Activities List. From March 1, through March 7, 2029, the 95th Street Bridge at mile 1.09 (CORPS MILE 332.1) and the 106th Street Bridge at mile 2.58 (CORPS MILE 330.6) over the Calumet River will be secured to masted navigation for removal. Vessels able to pass under the bridge without an opening may do so at any time. A barge will remain under one leaf to accommodate the removal of that leaf. From February 21, through March 15, 2030, the 95th Street Bridge at mile 1.09 (CORPS MILE 332.1) and the 106th Street Bridge at mile 2.58 (CORPS MILE 330.6) over the Calumet River will be secured to masted navigation as the new bridge leaf is being installed. A barge will remain under the new leaf until it is fully connected. A 48-hour break will be provided near the middle of the three-week project to accommodate commercial traffic; this will be coordinated through weekly TEAMS meetings hosted by the U.S. Coast Guard and the contractor to be announced in January 2030 through the Local Notice to mariners and the Bridge Maintenance and Activities List. The Contractor will temporarily light any reduction in vertical or horizontal clearances with steady burning yellow lights until the regular bridge navigation lights can be established. [20MAY26] [27MAY26] Position 41-43.65N 087-32.48W USCG Great Lakes District Local Notice to Mariners 44/2026
- NIAGARA RIVER - LAKE ERIE General / Autonomous Vessel Operations SAILDRONE, INC. is conducting operations with up to four Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked "SAILDRONE". The vehicles may be operating as far west as Sandusky Bay Western Basin and as far east as Lake Erie Eastern Basin. Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at [email protected] or via phone at +1-510-722-6070 Valid 2026-04-21 to 2026-11-15. USCG Great Lakes District Local Notice to Mariners 43/2026
- SUPERIOR FRONT CHANNEL - DULUTH HARBOR General / Autonomous Vessel Operations General/Autonomous Vessel Operations Anno.Ai will conduct test and evaluation operations of passive acoustic drone detection capabilities in Duluth Harbor from October 19, 2026, through October 23, 2026. Operations will take place daily, Monday through Friday, between 0700 and 1730. Operations and temporary buoy placement will occur between positions 46°46'01.2"N, 092°05'38.7"W and 46°46'09.3"N, 092°05'46.2"W. Temporary buoys will not be persistent. Buoys will be deployed daily after 0700 and retrieved by 1730 for the duration of the testing period. The work vessel Kingfisher will be on scene and monitoring VHF-FM channels 9 and 16. Mariners are requested to transit the area with caution. For further information, contact Nikki Merritt at (218) 393-9222. Position 46-46.10N 092-05.72W USCG Great Lakes District Local Notice to Mariners 43/2026
- LNM09-E639BBSÉCURITÉLAKE MICHIGAN - STURGEON BAY SHIP CANAL General / Marine Construction (Excluding Bridges) / Dredging General/Marine Construction (Excluding Bridges)/Dredging Roen Salvage Company will be conducting dredge material unloading operations in the Sturgeon Bay Ship Canal from October 28, 2026, through November 3, 2026. Operations will be conducted daily, Sunday through Saturday, between 0600 and 1800 (6:00 a.m. to 6:00 p.m.). Barges will be intermittently moored on the south side of the Sturgeon Bay Ship Canal for the unloading of dredge material. The contact vessel Tug Chas Asher and the barge Derrick 23 will be on scene monitoring VHF-FM Channels 7 and 16. Commercial traffic may contact Roen Salvage Company via radio (VHF-FM Ch. 7 / 16) or by phone prior to the project completion date of November 3 to verify barge presence and coordinate transit. Mariners are urged to transit the area with caution and minimize wake. For further information or questions, contact Peter Huber at (920) 743-6533. Position 44-48.52N 087-20.12W USCG Great Lakes District Local Notice to Mariners 43/2026
- PORT HURON TO PTE AUX BARQUES - LAKE HURON General / Autonomous Vessel Operations SAILDRONE, INC. is conducting operations with up to four Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked "SAILDRONE". Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at [email protected] or via phone at +1-510-722-6070 Valid 2026-09-15 to 2026-11-15. USCG Great Lakes District Local Notice to Mariners 43/2026
- LNM09-E05AD7SÉCURITÉBUFFALO RIVER General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Location: 42-51.71N 078-52.10W There will be repairs being conducted on the river wall near ADM elevator warf on the Buffalo river from August 31, 2026 to October 31, 2026. There will be two tug boats, a spud barge and 45 foot material float to conduct the repairs. Valid 2026-08-27 to 2026-10-31. USCG Great Lakes District Local Notice to Mariners 43/2026
- GREEN BAY HARBOR ENTRANCE CHANNEL - GREEN BAY CITY General / Bridges / Maintenance WI - LAKE MICHIGAN – Fox River From July 20, through October 31, 2026, between the hours of 0700 and 1600, Monday through Friday, 5 barges, 50-feet by 40-feet will be working under the fixed spans of the Ray Nitschke Bridge at mile 1.58, over the Fox River. [13JUL26] Position 44-31.10N 088-00.92W USCG Great Lakes District Local Notice to Mariners 43/2026
- LAKE SUPERIOR General / Autonomous Vessel Operations SAILDRONE, INC. is conducting operations with two Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked "SAILDRONE". The vehicles will be operating throughout Lake Superior and IVO of Isle Royale. Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at [email protected] or via phone at +1-510-722-6070. Valid 2026-04-29 to 2026-11-16. USCG Great Lakes District Local Notice to Mariners 43/2026
- GREEN BAY HARBOR ENTRANCE CHANNEL - GREEN BAY CITY General / Bridges / Inspection WI - LAKE MICHIGAN – Fox River On October 29,2026, between the hours of 0800 and 1600 the Bart Starr Bridge at mile 1.81, over the Fox River will require a 2-hour advance notice for openings due to ongoing rehabilitation of the bridge. Mariners should provide advance notice directly to the drawtender. [10OCT26] Position 44-30.90N 088-01.08W USCG Great Lakes District Local Notice to Mariners 43/2026
- LNM09-A53F3BSÉCURITÉLAKE ERIE - WEST END OF LAKE ERIE General / Marine Construction (Excluding Bridges) / Survey Operations Hydrographic Survey for Nautical Chart Update Ocean Surveys is expecting to conduct a Hydrographic Survey for NOAA to collect data for a nautical charting update in a portion of Western Lake Erie. There will be three vessels participating in the survey with operations being conducted 7 days a week. The survey vessels will make frequent 90-180 degree turns so other vessels in the area should maintain a sharp lookout and communicate early with the survey vessels. Valid 2026-06-08 to 2026-10-31. USCG Great Lakes District Local Notice to Mariners 43/2026
- LAKE ERIE - CLEVELAND HARBOR General / Bridges / Temp Deviation OH - LAKE ERIE – Cleveland Harbor On October 28, 2026, between the hours of 0900 and 1800 the Willow Avenue Bridge at Mile 1.02 over the Cuyahoga Old River Channel will be secured to masted navigation. At 1800 the process to open the bridge will take approx. 2-3 hours to complete where the bridge will remain in the fully open position for 2-3 weeks until replacement motors can be installed and calibrated to return the bridge to normal operations. [28OCT26] Position 41-29.85N 081-42.63W USCG Great Lakes District Local Notice to Mariners 43/2026
- LAKE MICHIGAN - CALUMET General / Bridges / Maintenance Location: 41-39.45N 087-38.47W Bridge Name: S Halstead St Bridge From March 24, 2026, through November 1, 2026, there will be scaffolding under the bridges that hangs no more than 2-feet below low steel. The scaffolding will display steady burning yellow lights on the bottom and four-corners to warn mariners of the temporary reduction in vertical clearance for the length of the scaffolding. Between the hours of 0600 and 1800, Monday through Saturday there will be a barge that is monitoring VHF-FM Marine Channel 16 and will require a 1-hour advance notice to accommodate vessels needing passage. Valid 2026-03-12 to 2026-09-01. USCG Great Lakes District Local Notice to Mariners 43/2026
- WEST END OF LAKE ERIE - SANDUSKYBAY General / Bridges / Maintenance OH - LAKE ERIE –Sandusky Bay From October 11 through November 1 for 30-hours each Sunday beginning at 0500 and ending on the following Monday at 1100. The Norfolk Southern Railroad Bridge at Mile 3.5 over the Sandusky Bay will be secured to masted navigation for maintenance. Vessels able to pass under the bride may do so at any time. [25SEP26] Position 41-29.10N 082-49.17W USCG Great Lakes District Local Notice to Mariners 43/2026
- LAKE ONTARIO - ROCHESTER HARBOR General / Bridges / Inspection From July 8, through October 31, 2026, between the hours of 0800 and 1630, Monday through Friday inspectors will utilize snooper trucks under all highway bridges between the E78 Syracuse Street Bridge at Mile 172.36 and the E092 Armitage Road Bridge at Mile 205.59, over the Erie Canal. And under the O-005 Hinmansville Road Bridge at Mile 5.27, the O-009 Onieda Street Bridge at Mile 12.10, and the O-014 Bridge Street Bridge at Mile 22.92 over the Oswego Canal. And under the S003 State Route 89 Bridge at Mile 5.70, the S006 Ovid Street Bridge at Mile 8.65, and the S007 Bridge Street Bridge at Mile 8.90, over the Cayuga Seneca Canal. Spotters will warn of approaching vessels and move the man lift to allow vessels to pass. USCG Great Lakes District Local Notice to Mariners 43/2026
- LNM09-D47FADSÉCURITÉKEWEENAW UPPER ENTRANCE - KEWEENAW WATERWAY General / Marine Construction (Excluding Bridges) / Dredging General/Marine Construction (Excluding Bridges)/Dredging Viking Marine Construction will be conducting hydraulic dredging operations in Ontonagon Harbor, Michigan, from October 10, 2026, to October 31, 2026. Operations will be conducted 24 hours a day, 7 days a week. Vessel on Station: Hydraulic cutterhead dredge AJ monitoring VHF-FM Channel 78. Pipeline: Approximately 4,500 feet of pipeline will run from the inner harbor to the northeast public beach disposal site. Pipeline and anchor buoys inside the channel will be marked every 500 feet with bright orange buoys, lighting, and reflective tape. Pipeline will be located inside the navigation channel. Disposal Site: Raised discharge pipe mounted on a yellow pontoon tank, marked with 4 flashing orange lights during night operations. Safety Advisory: All mariners are advised to proceed with caution, avoid all buoys, and maintain a minimum safe distance of at least 250 feet from the disposal pontoon. Dredge operator can be contacted on VHF-FM Channel 78. Point of Contact: Barry King at (616) 886-0245 or Viking Marine Construction at (616) 294-3597 / [email protected]. Position 46-52.58N 089-19.58W USCG Great Lakes District Local Notice to Mariners 43/2026
- LAKE MICHIGAN - CHICAGO HARBOR General / Bridges / Maintenance IL - LAKE MICHIGAN – Chicago Harbor From August 25, 2025, through October 30, 2026, between the hours of 0700 and 1600, Monday through Saturday, three barges, 90-feet by 50-feet or smaller will be working at the Cortland Street Bridge at Mile 4.48 (CORPS MILE 328.2) over the North Branch of the Chicago River. The barges will move with a 2-hour advance notice provided directly to the barges on VHF-FM Marine Channel 16. [31/25] Position 41-55.02N 087-39.85W USCG Great Lakes District Local Notice to Mariners 43/2026
- LNM09-7AFA3CSÉCURITÉMANISTEE - MANITOWOC HARBOR OF REFUGE General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Roen Salvage Company TYPE OF OPERATION: Breakwater Repairs LOCATION: Manitowoc Harbor, Lake Michigan COMMENCE DATE:6/15/2026 COMPLETE DATE:10/31/2026 HOURS OF OPERATION:6 a.m.TO:6 p.m. DAYS OF OPERATION Sunday TO: Saturday NAME OF CONTACT VESSEL: Tug David R. Schanock VHF-FM CHANNELS MONITORED:7 & 16 Valid 2026-06-15 to 2026-10-31. Position 44-05.52N 087-38.88W USCG Great Lakes District Local Notice to Mariners 43/2026
- LAKE MICHIGAN - CALUMET General / Bridges / Maintenance Location: 41-39.69N 087-44.99W From April 28, 2025, through October 31, 2026, scaffolding that hangs approximately 6-feet below low steel will be installed under one half of the 127th Street Bridge at Mile 18.81 (CORPS MILE 314.2) over the Calumet-SAG Channel. Bridge Name: 127th St Bridge Valid 2026-01-05 to 2026-10-31. USCG Great Lakes District Local Notice to Mariners 43/2026
- ST. LAWRENCE SEAWAY - LAKE ONTARIO General / Autonomous Vessel Operations SAILDRONE, INC. is conducting operations with up to four Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked "SAILDRONE". Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at [email protected] or via phone at +1-510-722-6070 Valid 2026-09-15 to 2026-11-15. USCG Great Lakes District Local Notice to Mariners 43/2026
- MAUMEE BAY - MAUMEE RIVER General / Bridges / Temp Deviation Location: 41-39.65N 083-30.71W Bridge Name: Craig Memorial Bridge OH - LAKE ERIE – Toledo Harbor On the following dates and times, the Craig Memorial Bridge at Mile 3.30 and the Martin Luther King Jr. Memorial Bridge at Mile 4.30 over the Maumee River will be secured to masted navigation for the following events. On July 4, 2026, between the hours of 0730 and 0900 in conjunction with the River Run 4 Miler. On August 9, 2026, between the hours of 0900 and 1100 in conjunction with the Jeep 4 Miler. On September 19, 2026, between the hours of 0700 and 0830 in conjunction with the Garmin Marathon. On October 10, 2026, between the hours of 1000 and 1130 in conjunction with the ProMedica Be fast. Vessels able to pass under the bridge without an opening may do so at any time. [20JAN26] Valid 2026-01-20 to 2026-10-10. USCG Great Lakes District Local Notice to Mariners 40/2026
- LNM09-BB6B84SÉCURITÉLAKE HURON - LAKE MICHIGAN General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Mariners are advised that Chicago Underwater, LLC will be conducting commercial dive operations at approximate position 42° 08.124' N, 086° 29.152' W (42.135405°, -86.485867°) from October 19, 2026 through October 27, 2026. Operations will take place daily between the hours of 0700 and 1700, Monday through Friday, from the vessel LC-34. A diver down flag and an Alpha flag will be flown during all diving operations. Mariners are requested to maintain a minimum distance of 300 feet from the vessel whenever these flags are displayed. The vessel will be monitoring VHF-FM Channel 16. For further information, contact Steven Hughes at (814) 553-2300. Valid 2026-10-17 to 2026-10-27. Position 42-08.12N 086-29.15W USCG Great Lakes District Local Notice to Mariners 40/2026
- LNM09-15B220SÉCURITÉLAKE MICHIGAN - WAUGOSHANCE POINT TO SEUL CHOIX POINT General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Mariners are advised that Chicago Underwater, LLC will be conducting commercial dive operations at approximate position 45° 55.223' N, 085° 54.175' W (45.920386°, -85.902912°) from October 9, 2026 through October 16, 2026. Operations will be conducted from the vessel LC-34 daily between the hours of 0700 and 1700, Monday through Friday. A diver down flag and an Alpha flag will be flown during diving operations. Mariners are requested to keep a minimum distance of 300 feet from the vessel while these flags are displayed. The vessel will be monitoring VHF-FM Channel 16. For further information, contact Steven Hughes at (814) 553-2300. Valid 2026-10-08 to 2026-10-16. Position 45-55.22N 085-54.17W USCG Great Lakes District Local Notice to Mariners 40/2026
- NIAGARA RIVER - LAKE ERIE General / MSIB SAILDRONE, INC. is conducting operations with up to four Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked "SAILDRONE". The vehicles may be operating as far west as Sandusky Bay Western Basin and as far east as Lake Erie Eastern Basin. Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at [email protected] or via phone at +1-510-722-6070 Valid 2026-04-21 to 2026-11-15. USCG Great Lakes District Local Notice to Mariners 40/2026
- LAKE MICHIGAN - UPPER GREEN BAY General / Bridges / Construction WI - LAKE MICHIGAN – Fox River From September 14 through October 12, 2026, between the hours of 0730 and 1900, Monday through Friday, a 60-foot by 30-foot barge will be working at the Proposed Brown County South Connector Bridge at Mile 9.94, over the Fox River. The barge will monitor VHF-FM Marine Radio Channel 16 for passing arrangements. [12AUG26] Position 44-26.43N 088-03.98W USCG Great Lakes District Local Notice to Mariners 40/2026
- LAKE MICHIGAN - INDIANA HARBOR ATON / Advanced Notice of Change Location: 41-40.01N 087-26.52W Aid Name: Indiana Harbor Light 7 LLNR: 19700 Action: CHANGE Action Type Change Light Signals The Coast Guard will be changing the characteristics of the lighted signal from F G to Occ G 4s. The change is in response to the installation of a more reliable lantern assembly. For any comments or questions on these proposed changes please contact: The Great Lakes District Aids to Navigation manager at [email protected]. Valid 2026-04-20 to 2026-10-17. USCG Great Lakes District Local Notice to Mariners 40/2026
- LNM09-AF03E2SÉCURITÉLAKE MICHIGAN - MICHIGAN CITY General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes The crane-barge Derrick 3 will also monitor channel 7. Leave no wake when passing active construction. Always remain clear of floating equipment in the harbor. Valid 2026-09-30 to 2026-10-15. Position 41-43.80N 086-54.87W USCG Great Lakes District Local Notice to Mariners 40/2026
- LAKE HURON - PORT AUSTIN General / Miscellaneous Location: Port Austin Reef Light Description: Port Austin Reef Light is in the process of transferring from a federal to a privately operated aid to navigation. In the interim, the lighthouse owner has been authorized to operate the newly installed historical lantern for operational testing. The newly installed lantern will display a fixed white signal, with alternating red flashes. The federally designated FL W 6s lantern will remain in operation until the transfer is completed, at which point the Light List and charts will be updated to reflect the private operation. Valid 2026-05-26 to 2027-05-26. USCG Great Lakes District Local Notice to Mariners 40/2026
- PORT HURON TO PTE AUX BARQUES - MARINE CITY General / Bridges / Inspection MI – ST. CLAIR RIVER – Belle River On October 6 and October 7, 2026, between the hours of 0800 and 1600, divers will be inspecting the under water portions of the Bridge Street Bridge at Mile 0.5 over the Belle River. Spotters will warn divers of approaching vessels and will operate a dive safety vessel that will monitor VHF-FM Marine Channel 16. [22SEP26] Position 42-42.78N 082-29.78W USCG Great Lakes District Local Notice to Mariners 40/2026
- LAKE SUPERIOR General / Miscellaneous RV Lake Char operations will be setting bottom set gill nets that are 1,200-2,400 ft long, extend about 6 feet from the bottom and are set overnight. Our summer survey will be within a few miles of shore at depths between 80 and 250 ft. Nets are marked with black and orange flagged staff buoys that are labeled with our agency identification. Valid 2026-08-03 to 2027-01-30. USCG Great Lakes District Local Notice to Mariners 40/2026
- LAKE SUPERIOR General / MSIB SAILDRONE, INC. is conducting operations with two Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked "SAILDRONE". The vehicles will be operating throughout Lake Superior and IVO of Isle Royale. Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at [email protected] or via phone at +1-510-722-6070. Valid 2026-04-29 to 2026-11-16. USCG Great Lakes District Local Notice to Mariners 40/2026
- SUPERIOR FRONT CHANNEL - STLOUISBAY General / Bridges / Construction From August 26 through October 10, 2026, between the hours of 0700 and 1900, Monday through Friday, a 70-foot by 50-foot barge will be taking soil borings under the John A. Blatnik I-535 Bridge at Mile 2.74 over the St. Louis Bay and River. The barge should be operating on the edges of the channel but will move to accommodate larger vessels with a 2-hour advance notice. The barge will monitor VHF-FM Marine Radio Channel 16. Position 46-44.95N 092-06.05W USCG Great Lakes District Local Notice to Mariners 40/2026
- LUDINGTON - PERE MARQUETTE LAKE General / MSIB Deactivation of Ludington, Michigan Regulated Navigation Area Enforcement The Captain of the Port, Sector Lake Michigan is deactivating and will cease enforcement of the Regulated Navigation Area (RNA) announced in MSIB 01-26. This deactivation applies to the RNA covering all navigable waters of the Ludington Harbor Ship Channel, Pere Marquette Lake, and a portion of Lake Michigan within 1,000 yards of the Ludington, Michigan harbor entrance. This cessation of enforcement will take effect on Tuesday, October 6, 2026, at 4 a.m. This action is taken as the hazardous conditions that prompted the enforcement are no longer present. All waterway users are reminded to navigate with caution. Further inquiries may be made by phone to the Sector Lake Michigan Command Center at (414) 747-7182 or via email at [email protected]. Valid 2026-10-06 to 2026-10-18. Position 43-57.10N 086-27.33W USCG Great Lakes District Local Notice to Mariners 40/2026
- LNM09-3759DCSÉCURITÉLAKE MICHIGAN - MICHIGAN CITY General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Stone and pier repair work east pier head for Michigan City Harbor. Spud Barge “Justin Avery” and Tug “George F. Bailey” VHF-FM 16 & 7 Valid 2026-08-03 to 2026-10-15. Position 41-43.72N 086-54.70W USCG Great Lakes District Local Notice to Mariners 40/2026
- LNM09-784E54SÉCURITÉKEWEENAW WATERWAY - TORCH LAKE CANAL General / Marine Construction (Excluding Bridges) / Dredging U.S. Environmental Protection Agency Great Lakes National Program Office (GLNPO) will commence on or about June 01, 2026, in Torch Lake adjacent to the Lake Linden Recreation Area in the Village of Lake Linden, Houghton County, Michigan. The work area is a 3.2-acre dredge footprint covering approximately 1,300 LF along the Northwestern shoreline of Torch Lake from approximately 47°11’20.7371”N 088°24’25.0909”W to 47°11’16.2637”N 088°24’20.8101”W and a sediment processing/unloading dock located at approximately 47°10’35.0189”N 088°25’10.1927”W. Loaded and unloaded hopper barges will be towed approximately 1.2 miles between the Dredging Area and Sediment Area Processing Dock as needed. Three turbidity monitoring buoys will be deployed in support of the work. Four (4) No Wake/No Entry buoys will be installed in the immediate vicinity of dredging work areas. Brennan will also install approximately 550 linear feet of temporary sheet piling along the western edge of the dredge area to facilitate near-shore dredge cuts. Buoys will be marked with navigation lights pursuant to 33 CFR 62.45 to indicate the work areas and project equipment. Inside the Dredging Area, Barge Lane, and Sediment Processing Dock Area, equipment consisting of the Tug Debra Mary, the JFB 4400 (Dean Barge), the BMI 102 and BMI 103 material barges, the JFB 4477 spud barge, the Alton Barge, four S-50 sectional barges, the JFB 7771 survey vessel, push boats, and small skiffs will operate from approximately 6:00 AM to 6:00 PM, Monday-Saturday. See the attached drawings to show the project location and operations areas. All vessels and crew will monitor VHF channel 16 during the project execution. On-water operations are expected to commence June 1, 2026. Mechanical dredging is currently scheduled from approximately July 1, 2026 through August 19, 2026, with backfill and demobilization continuing through October 19, 2026 (on-site construction complete date) and final project close-out by December 31, 2026. Hours of operation are from 0600-1800 7 days a week. JFB Vessels – Dean Barge, Tug Debra Mary, JFB 7771 Channel 16 and 22a Valid 2026-06-01 to 2026-10-31. Position 47-11.27N 088-24.38W USCG Great Lakes District Local Notice to Mariners 40/2026
- GREEN BAY HARBOR ENTRANCE CHANNEL - GREEN BAY CITY General / Bridges / Public Notice An application has been received by the Commander, Great Lakes Coast Guard District from the Wisconsin Department of Transportation (WDOT) for a U.S. Coast Guard Bridge Permit. The permit is for a fixed highway thrust arch bridge carrying the South Bridge Connector over Mile 9.94 of the Fox River, City of De Pere, Brown County, Wisconsin. The proposed new thrust arch bridge will have a low steel vertical clearance of 33.27-feet and a horizontal clearance of 150.00-feet. Public Notice 09-01-26 dated 14 September 2026 contains a detailed description of the proposed bridge project including location maps and bridge drawings with navigational clearances. Interested parties may access the notice at the following website: https://www.navcen.uscg.gov/public-notices-for-bridges-active-by-district?district=9&subdistrict=n Position 44-26.43N 088-03.98W USCG Great Lakes District Local Notice to Mariners 40/2026
- LNM09-745E73SÉCURITÉLAKE MICHIGAN - MICHIGAN CITY General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Location: 41-43.69N 086-54.92W Stone and pier repair work on Detached Outer Breakwater Valid 2026-08-01 to 2026-10-15. USCG Great Lakes District Local Notice to Mariners 40/2026
- GREEN BAY HARBOR ENTRANCE CHANNEL - GREEN BAY CITY General / Bridges / Rehabilitation WI - LAKE MICHIGAN – Fox River From October 12 through October 23,2026, between the hours of 0600 and 2000, the Ray Nitschke Bridge at mile 1.58, over the Fox River will require a 2-hour advance notice from mariners; except that on 0600 to 2000 on October 19, and from 0600 on October 20 to 2000 on October 21, 2026, the bridge will be secured to masted navigation. Mariners should provide advance notice to the drawtender for openings except for the days the bridge is secured to masted navigation. [08SEP26] Position 44-31.10N 088-00.92W USCG Great Lakes District Local Notice to Mariners 40/2026
- LAKE MICHIGAN - MANISTEE General / Bridges / Inspection MI - LAKE MICHIGAN-Manistee Harbor From October 12 through October 15, 2026, between the hours of 0700 and 1700, daily, the U.S. Route 31 Bridge at Mile 1.4 over the Manistee River will require a 1-hour advance notice for openings. Mariners should provide advance notice directly to the draw tender. Inspectors will be using snooper trucks under the bridge. Spotters will warn inspectors of approaching vessels and will move the manlift to allow vessels to pass under the bridge. [25SEP26] Position 44-15.02N 086-19.15W USCG Great Lakes District Local Notice to Mariners 40/2026
- LOWER NIAGARA RIVER - NIAGARA RIVER General / Bridges / Inspection From October 5 through October 9, 2026, between the hours of 0700 and 1500 daily, a 80-foot by 34-foot barge will be inspecting the North Grand Isle Bridges at Mile 18 over the Niagara River. The barge will monitor VHF-FM Marine Channel 16 and move if provided a 30-minute advance notice directly to the barge. [22SEP26] Position 43-04.13N 078-59.45W USCG Great Lakes District Local Notice to Mariners 40/2026
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