US Coast Guard LNM - Heartland District Gulf (D8)
US · 296 in force · 35 new this week · 260 archived · updated 11 Nov 2026, 19:02 UTC · page 5 of 6
- LNM08G-55F2FDPAN PANMOBILE CHANNEL - MOBILE RIVER General / Miscellaneous Mobile River - Twelve Mile Island - Private Aid to Navigation Established --- On: 2025-02-21 --- Four danger marker lights with a flashing white light at night have been established along the LDB of the Mobile River near the Twelve Mile Island split. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - MISSISSIPPI SOUND General / Miscellaneous The Department of the Air Force will enforce the charted Restricted Area found in 33 CFR 334.730. This area includes certain navigable waters of Santa Rosa Sound, the GIWW (Miles 204.6 to 216.4, WHL), and the Gulf of America (Gulf of Mexico) adjacent to Eglin Air Force Base Property. All entry, transit, anchoring or drifting within the restricted area for any reason is not allowed without permission from the U.S. Air Force (96 TW/CC), except to navigate the Gulf Intracoastal Waterway. Such vessels and other watercraft shall confine their movements to the waters within the limits of the GIWW and shall make the passage as promptly as possible under normal vessel speed. Other permitted access to the Restricted Area may be granted, in certain circumstances, by contacting the 96 TW/CC at (850) 882-2000. Position 30-23.05N 086-48.40W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- General / Miscellaneous Gulf of America - Uncharted Private Aid to Navigation --- Established: 2025-01-16 --- An offshore yellow buoy has been established in position 26-32.63N 096-18.05W. Position 26-32.63N 096-18.05W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LAGUNA MADRE CHANNEL - BROWNSVILLE CHANNEL General / Hazards To Navigation / Obstructions Brownsville Ship Channel - ATON Wreckage --- Brownsville Channel A Range Front Light (LLNR-29870) has been reported destroyed and partially submerged outside of the channel in approximate position 26-01.85N 097-13.53W. The partially submerged structure has been marked channel ward of the wreckage with a lighted buoy displaying a quick flashing green light at night, in approximate position 26-01.85N 097-13.54W. Position 26-01.85N 097-13.53W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR CORPUS CHRISTI, TERRITORIAL SEA - SECTOR CORPUS CHRISTI, SUBMERGED LAND ACT (SLA) General / Miscellaneous Gulf of America - Uncharted Private Aid to Navigation --- Established: 2025-08-13 --- An offshore yellow scientific buoy with a flashing yellow light has been established in approximate position 27-44.90N 096-59.38W. Position 27-44.90N 096-59.38W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - CHOCTAWHATCHEE BAY General / Miscellaneous The Department of the Air Force will enforce the charted Restricted Area found in 33 CFR 334.742. This area includes certain navigable waters of Choctawhatchee Bay and Dons Bayou adjacent to Eglin Air Force Base Property. All entry, transit, anchoring, or drifting of any persons, vessels, and other craft (including unmanned craft) within the Restricted Area for any reason is not allowed without the permission of the U.S. Air Force (96 TW/CC). Permitted access to the Restricted Area may be granted, in certain circumstances, by contacting the 96 TW/CC at (850) 882-2000. Position 30-28.23N 086-35.50W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR CORPUS CHRISTI, TERRITORIAL SEA - SECTOR CORPUS CHRISTI, SUBMERGED LAND ACT (SLA) General / Miscellaneous Gulf of America - Uncharted Private Aid to Navigation --- Established: 2025-01-16 --- An offshore yellow buoy has been established in position 26-06.20N 096-15.04W. Position 26-06.20N 096-15.05W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR CORPUS CHRISTI, TERRITORIAL SEA - SECTOR CORPUS CHRISTI, SUBMERGED LAND ACT (SLA) General / Miscellaneous Gulf of America - Uncharted Private Aid to Navigation --- Established: 2025-08-13 --- An offshore yellow scientific buoy with a flashing yellow light will be established in approximate position 27-40.30N 097-02.83W. Position 27-40.30N 097-02.83W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR CORPUS CHRISTI, TERRITORIAL SEA - SECTOR CORPUS CHRISTI, SUBMERGED LAND ACT (SLA) General / Miscellaneous Gulf of America - Uncharted Private Aid to Navigation --- Established: 2025-01-16 --- An offshore yellow buoy has been established in position 27-25.95N 095-57.74W. Position 27-25.95N 095-57.73W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- GALVESTON BAY ENTRANCE CHANNEL - HOUSTON SHIP CHANNEL General / MSIB Houston Ship Channel - Morgans Point - VTS USI Canal/San Jacinto Bay Channel Directive --- The USI Canal/San Jacinto Bay Channel has become increasingly trafficked over the last 2 years. For various reasons, many tows attempt to reconfigure between Morgans Point and Exxon to go into or come out of the USI Canal. This practice has resulted in several near miss situations between Morgans Point and the Exxon Terminal in the Houston Ship Channel. In order to fulfill the VTS mission of reducing risk of collision, allision, damage, pollution, and injury, the following Directive is in effect and will be written as policy in documentation updates to the U.S. Coast Guard VTS Houston-Galveston User Guide: • Vessel Traffic Service Houston-Galveston Directs no barge work in the Houston Ship Channel between Morgans Point and Exxon for purposes of going into/out of the USI Canal. • USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) General / Miscellaneous Gulf of America - Uncharted Private Aid to Navigation --- Established: 2025-04-24 --- An offshore yellow scientific buoy has been established in approximate position 29-34.47N 093-48.40W. Position 29-34.47N 093-48.40W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-389533SÉCURITÉSECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) - MERMENTAU CHANNEL General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Grand Lake - Mermentau River - Catfish Point Control Structure - Restricted Operations --- To: Until Further Notice --- Catfish Point Control Structure is currently in a restricted locking procedure because of low water and high salinity in Grand Lake. The restricted procedure will consist of locking vessels from 6:00 a.m., at the top of every hour, until 6:00 p.m., each day. For up-to-date information, the Catfish Point Control Structure can be contacted at (337) 540-3160. POC: USACE (504) 862-2971 and (337) 529-7510 Valid 2026-09-17 until further notice. Position 29-51.78N 092-50.90W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-A5F686SÉCURITÉSECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Calcasieu Lake - Lakeshore Canal - Marine Construction --- --- The installation of drainage structures will take place along the east shoreline of Calcasieu Lake. Work will include dredging, pile driving, the dredging and creation of temporary flotation channels, the installation of T-walls, rip rap placement, and the installation of subsea barrier mats. Work will take place 24-hours a day, 7-days a week. On-scene vessels and equipment will include a 27 ft workboat, a 39 ft dredge tender, floating and submerged pipeline, an excavator barge, a spud barge, and two crane barges. A portion of the Lakeshore Canal will be blocked during the removal of the existing sheet pile structure at Mangrove Bayou. Temporary warning signs will be installed in the area. Mariners are urged to maintain a safe distance from the worksite and transit at their slowest safe speed to minimize wake. POC: (337) 304-6308 Valid 2026-09-17 to 2029-05-19. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-79DE76SÉCURITÉGALVESTON BAY ENTRANCE CHANNEL - HOUSTON SHIP CHANNEL General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Houston Ship Channel - Dock Construction --- To: Until Further Notice --- Dock construction is being conducted along the Houston Ship Channel at the Port of Houston City Dock 2. Operations will be conducted during daylight hours only. Mariners should transit the area with caution and at their slowest safe speed to minimize wake. POC: (346) 955-0786 Valid 2026-09-15 until further notice. Position 29-44.83N 095-17.18W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-3111B0SÉCURITÉGALVESTON BAY ENTRANCE CHANNEL - HOUSTON SHIP CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Houston Ship Channel - Dredge Operation --- To: Until Further Notice --- The Dredge MBI-10 will be conducting dredging operations along the Houston Ship Channel in the vicinity of the OneOK MVP/Magellan Valero Terminal. Dredged material will be loaded into regulation hopper barges and transported to an unloader barge located at Adloy along the San Jacinto River. On-scene support vessels will include the T/Vs TOWNES JEFFERY, GRAND ANN and JACKSON FOSTER. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution after passing arrangements have been made. VHF-FM Channels: 76 or 78, POC: (228) 760-0931 Valid 2026-09-14 until further notice. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-0DAAE6SÉCURITÉBRETON/CHANDELEUR ICW ALTERNATE ROUTE - BAPTISTE COLLETTE BAYOU General / Marine Construction (Excluding Bridges) / Dredging Baptiste Collette Bayou – Dredge Operation --- --- The Dredge CAPTAIN FRANK and attendant plant will conduct non-continuous dredging in Baptiste Collette Channel between Mile 5.0 and Mile 12.0. Work limits for disposal areas and pipeline corridors will be bound by the following approximate positions: 29-22.63N 089-18.30W, 29-24.91N 089-18.63W, 29-26.52N 089-17.86W, 29-26.85N 089-18.76W, 29-25.41N 089-19.55W and 29-23.20N 089-19.43W. Operations will be conducted 24-hours a day, 7-days a week. Dredged material will be transported to the right and left descending banks of the channel using a combination of floating and submerged pipeline. Mariners are urged to use extreme caution and transit the area at their slowest safe speed to create minimum wake after passing arrangements have been made. VHF-FM Channels: 13, 16 and 67, POC: (337) 852-4066 or (224) 221-3753 Valid 2026-09-14 to 2026-12-03. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-B59E27SÉCURITÉSECTOR NEW ORLEANS, EXCLUSIVE ECONOMIC ZONE (EEZ) - SECTOR NEW ORLEANS, TERRITORIAL SEA General / Marine Construction (Excluding Bridges) / Dredging Gulf of America - Timbalier Bay - Dredge Operation --- --- The Dredges C.R. McCASKILL, MAGDALEN and R.B. WEEKS will conduct dredging operations offshore, approximately 7.5 nm south of Whiskey Pass, for the West Bell Headland repair project. Operations will be conducted 24-hours a day, 7-days a week. The dredges will operate in an area bound by approximate positions: 28-55.89N 090-56.08W, 28-55.25N 090-39.92W, 28-53.69N 090-39.96W and 28-54.03N 090-56.10W. Dredged material will be transported via scow barges inshore and pumped into the designated fill placement area near Timbalier Bay using a combination of 30-inch diameter submerged, floating and shore pipelines. Mariners are urged to use extreme caution and transit the project areas at their slowest safe speed to create minimum wake after passing arrangements have been made. VHF-FM Channels: 13, 16 and 72, POC: (224) 563-4367, (336) 473-4060, or (224) 221-9834 Valid 2026-09-13 to 2026-12-31. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR NEW ORLEANS, EXCLUSIVE ECONOMIC ZONE (EEZ) General / Autonomous Vessel Operations Gulf of America - Uncrewed Surface Vessel Operation --- --- Surveys and data collection will be conducted in the Gulf of America by the Unmanned Surface Vessel (USV) MC-40 in support of work taking place at the Thunder Horse platform, located in Mississippi Canyon Area, Block 778. The USV will be surveying the eddy current Hurlburt and will operate within 20 miles of approximate position 28-11.46N 088-29.76W. The USV is 39 ft long with a yellow hull, a top speed of 7 knots, and the following AIS Data: AIS: MC40-5 (UNMANNED), MMSI: 368412730. The USV will be continuously monitored and operated 24-hours a day, 7-days a week, and is equipped with live visual and thermal cameras, radar, AIS, an automatic anchor system, and navigation lights. The vessel will depart from Port Fourchon, LA, and will be escorted into and out of the port with a chase boat. Crew boat services will be available for rapid intervention offshore, if required. Mariners are requested to maintain a wide berth from the USV while in operation. VHF-FM Channels: 13 and 16, POC: (337) 362-4791 Valid 2026-09-10 to 2026-11-30. Position 28-11.47N 088-29.77W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-66E2AFSÉCURITÉSECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) - SABINE BANK CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Sabine Bank Channel - Dragging and Dredging Operation --- To: Until Further Notice --- The M/Vs MR. TOMMY and PAMLICO SOUND and the Dredge ELLIS ISLAND will be conducting dredging and dragging operations in the Sabine Bank Channel between Sabine Bank Channel Lighted Buoy 21 (LLNR-22380) and Sabine Bank Channel Lighted Buoy 26 (LLNR-22395). Additional on-scene vessels may include the Survey Vessels JONATHAN WOODWARD, LADY BECKY, FM BROWN, SUN RAY, SUN FIGHTER and OHIO RIVER. Mariners are urged to transit the area with caution after passing arrangements have been made. VHF-FM Channel: 16 Valid 2026-09-08 until further notice. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-09915BSÉCURITÉSECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) - SABINE BANK CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Sabine Bank Channel - Dragging and Dredging Operation --- To: Until Further Notice --- The M/V JESSICA MARIE and the Dredge PADRE ISLAND will be conducting dragging and dredging operations in the Sabine Bank Channel between Sabine Bank Channel Lighted Buoy 7 (LLNR-22335) and Sabine Bank Channel Lighted Buoy 12 (LLNR-22355). Additional on-scene vessels may include the Survey Vessels JONATHAN WOODWARD, LADY BECKY, FM BROWN, and OHIO RIVER. Mariners are urged to transit the area with caution after passing arrangements have been made. VHF-FM Channel: 16 Valid 2026-09-08 until further notice. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) - CALCASIEU RIVER General / Bridges / Construction Calcasieu River - Bridge Construction --- --- Bridge construction will be conducted in the Calcasieu River near the existing I-10 Bridge at Mile 36.3. Operations will include marine pile driving, concrete footing/column/cap construction, girder erection, and deck construction. Work will be conducted 24-hours a day, 7-days a week. On-scene vessels will include the Crane Barges JOE TIMPHONY, BINGHAM STEWART, and 901.387, the Material Barges BOH 6, HENRY BOH, M8118, and M8119, two additional material barges, towing vessels, and a derrick barge. The channel near the bridge may be partially or completely obstructed during different phases of the operation. Mariners must coordinate with the on-scene vessels prior to transiting the area to ensure non-self propelled work boats can be moved out of the channel. Vessels are urged to transit the area at their slowest safe speed to minimize wake and proceed with caution. VHF-FM Channel: 68, POC: (225) 405-6116 Valid 2026-09-08 to 2031-12-07. Position 30-14.23N 093-14.83W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-969716SÉCURITÉHARLINGEN-PORT ISABEL - ARROYO COLORADO CUTOFF CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Arroyo Colorado River - Dredge Operation --- --- The Dredge RANGER will conduct dredging operations from the mouth of the Arroyo Colorado River Cutoff Channel to Rio Hondo, approximate Mile 20.0. Dredging will start near the mouth of the river and proceed west towards the Port of Harlingen. Operation will take place 24-hours a day, 7-days a week. On-scene vessels and equipment will include approximately 15,000 linear ft of pipe, two supply barges, one anchor barge, one crane barge, a fuel barge, and three tender boats. The Dredge RANGER requests vessels transiting this stretch of the river coordinate passing arrangements at least 45-minutes in advance. Mariners are requested to avoid meeting or overtaking in the area and should transit at their slowest safe speed to minimize wake. VHF-FM Channels; 13 and 16, POC: (713) 913-7205 Valid 2026-09-04 to 2027-01-31. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-0CC484SÉCURITÉSECTOR MOBILE, SUBMERGED LAND ACT (SLA) - MISSISSIPPI SOUND General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Portersville Bay - Mississippi Sound - Marine Construction --- --- Breakwater structures will be constructed along the northwest side of Marsh Island in Portersville Bay, near approximate position 30-19.42N 088-13.57W. The breakwaters will be installed via shallow draft barge and will be identical to the existing structures located on the southern half of the island. On-scene vessels will include, but are not limited to, pushboats, barges, material handlers, and transport vessels. Mariners are requested to transit the area at no-wake speed. VHF-FM Channels: 12 and 16, POC: (251) 751-4127 and 251-895-6378 Valid 2026-09-04 to 2027-04-04. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-ED35EBSÉCURITÉNEW ORLEANS HARBOR - NEW ORLEANS TO BATON ROUGE General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Mississippi River - Marine Construction --- --- Construction will take place at the Port of Baton Rouge, near Mile 230.0, RDB, AHOP, for petroleum dock expansion. Operations will be conducted daily, from dusk until dawn. Work will consist of pile driving, welding, and demolition. Mariners are requested to give the work site a wide berth and transit at their slowest safe speed to minimize wake. Valid 2026-09-03 to 2027-05-28. Position 30-26.65N 091-12.00W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-205B22SÉCURITÉGALVESTON BAY - GALVESTON CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Galveston Channel - Dredge Operation --- To: Until Further Notice --- The Dredge MIKE HOOKS is conducting dredging operations along the Galveston Channel near Halliburton. Floating dredge pipeline is staged near Texas A & M. The dredge requests 30-minutes notice from vessels engaged in towing and 1-hour notice from ships transiting the area. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution. POC: (337) 489-6793 Valid 2026-09-03 until further notice. Position 29-18.78N 094-47.60W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-F2836BSÉCURITÉHOUMA NAVIGATION CANAL - TIMBALIER TERREBONNE BAY General / Marine Construction (Excluding Bridges) / Dredging Timbalier Bay - Port Fourchon - Dredge Operation --- --- The Dredges C.R. McCASKILL, MAGDALEN, and R.B. WEEKS will conduct dredging operations offshore, approximately 7.5 nm south of Whiskey Pass. Dredged material will be transported via scow barges inshore and pumped into the designated fill placement area using a combination of 30-inch diameter submerged, floating and shore pipelines. Dredge pipeline, placement areas and equipment will be located in the vicinity of Timbalier Bay, near Port Fourchon, and will be bound by approximate positions: 29-07.52N 090-18.21W, 29-07.00N 090-12.40W, 29-02.17N 090-12.70W and 29-02.86N 090-19.04W. Operations will be conducted 24-hours a day, 7-days a week. Mariners are urged to use extreme caution and transit the project areas at their slowest safe speed to create minimum wake after passing arrangements have been made. VHF-FM Channels: 13, 16 and 72, POC: (224) 563-4367, (336) 473-4060, or (224) 221-9834 Valid 2026-09-01 to 2026-12-31. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-7C0145SÉCURITÉVICTORIA WEST ENTRANCE CHANNEL - SAN ANTONIO BAY General / Marine Construction (Excluding Bridges) / Dredging GIWW - Dredge Operation --- --- The Dredge VANETA MARIE will be working in the GIWW between Mile 490.5, WHL, and Mile 517.5, WHL. Operations will be conducted 24-hours a day, 7-days a week. A combination of floating and submerged pipelines will be laid parallel to the waterway, outside of the channel boundaries. The dredge will operate across the entire channel width in a single pass and will be limited in maneuverability. Additional on-scene vessels will include the M/Vs ACADIA, SAGUARO, JAY EM and LITTLE BIGHORN. Four hour closure windows may be required during different phases of the dredge operation. Tug and barge traffic are requested not to meet or overtake while transitioning through the active dredge site. Mariners are urged to transit the area with extreme caution and coordinate passing arrangements with the dredge at least 1-hour in advance. VHF-FM Channels: 13, 16 and 71A, POC: (337) 607-9930 Valid 2026-09-01 to 2027-02-21. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-971FFASÉCURITÉARANSAS PASS TO BAFFIN BAY - CORPUS CHRISTI CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Corpus Christi Channel - Dredge Operation --- --- The Dredge LORRAINE HOOKS and attendant plant will be dredging in the Corpus Christi Channel, from Port Aransas to the Corpus Christi Harbor Entrance. Operations will be conducted 24-hours a day, 7-days a week. Floating and submerged pipeline connecting and leading to multiple disposal areas will be present in and along the project area. The dredge requests all vessels requiring the majority of the channel to navigate safely coordinate passing arrangements at least 1-hour in advance. Mariners are urged to transit the area at their slowest safe speed to minimize wake and proceed with caution. VHF-FM Channels: 13 and 16, POC: (337) 794-7046 or (229) 254-4900 Valid 2026-08-28 to 2027-05-01. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-228B49SÉCURITÉSECTOR NEW ORLEANS, EXCLUSIVE ECONOMIC ZONE (EEZ) General / Marine Construction (Excluding Bridges) / Survey Operations Gulf of America - Survey Operation --- --- Survey operations will be taking place in the Gulf of America by the M/V ISLAND FRONTIER with M/V REM ANDES and M/V SANCO SWORD. Each vessel will be towing 400 meter long cables in area bound by approximate positions: 27-54.83N 092-06.05W, 27-52.85N 089-52.06W and 26-24.29N 089-54.51W. Vessels are requested to maintain a wide berth from the survey vessels to avoid entanglement and interfering with survey data collection. Valid 2026-08-24 to 2026-12-31. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-3801ACSÉCURITÉGALVESTON BAY ENTRANCE CHANNEL - GALVESTON BAY General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Galveston Bay – Houston Ship Channel – Pipeline Operation --- --- Approximately 22 miles of 24 inch pipeline is being installed in Galveston Bay from Beach City to Texas City. Crews and vessels will be on-site 24-hrs a day, with work conducted between approximately 6:00 a.m. and 6:00 p.m. Operations will include pipe laying, jetting, and dredging. Work will move closer to the Houston Ship Channel during certain phases, with equipment operating as close as 1,800 ft outside of the channel. On-scene vessels may include some or all of the following vessels, depending on the stage of the project: Barges BB-90, BB-60, BB-80, BB-70 and BB-40, water barges, material barges, and the M/Vs MISS ANNE, MISS MICHELLE, GRACIE CLAIRE, CAPT TIMMY, VANESSA RAE, LINDA C, LA SUNSET, JACKIE, JACOB MATTHEWS, SEA TIGER, and MILA KATE. Mariners are requested to transit the area at their slowest safe speed to minimize wake. Valid 2026-08-21 to 2027-03-01. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-52C4D5SÉCURITÉSECTOR CORPUS CHRISTI, TERRITORIAL SEA - SECTOR CORPUS CHRISTI, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Colorado River - GIWW - Lock Closure --- --- The Colorado River Locks on the GIWW, Miles 441.0 and 442.0, WHL, will be closed to marine traffic for repairs to the west lock south riverside sector gate. The closure will take place from 8:00 a.m. to 6:00 p.m., Monday through Friday, excluding federal holidays. Mariners should confirm closure times prior to transiting the area to avoid delays. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution after passing arrangements have been made. POC: Lockmaster (979) 482-7321 Valid 2026-08-18 to 2026-11-20. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-BAC7CCSÉCURITÉMOBILE CHANNEL - MOBILE RIVER General / Marine Construction (Excluding Bridges) / Dredging Mobile River - Mobile Channel - Dredge Operation --- --- The Dredge VIRGINIAN will conduct maintenance dredging operations in the Mobile River and Mobile Channel starting approximately 900 ft south of the Cochrane Bridge in the Mobile Harbor to Mobile Channel Light 49 (LLNR-6510). Operations will be conducted 24-hours a day, 7-days a week. Dredged material will be hauled offshore to the Ocean Dredge Material Disposal Site (ODMDS) located south of Dauphin Island, AL. On-scene equipment and vessels will include dredge pipe, the Scows 4002, 6001, 6002, 6003, 6004, and BR8, the T/Vs ELIZABETH ANN, PATRICIA JEAN, AMY HERBERT, and COLONEL, the M/Vs MISS TAMI JO and MISS CATE, a fuel barge, a 200 ft by 60 ft crane barge, the Crew Boat SEA SUB, and the Survey Vessel MITCHELL. The dredge will operate on four anchors and on spuds, which will limit the dredge's maneuverability. Portions of the channel will be obstructed during dredging. Vessels should coordinate passing arrangements at least 1-hour in advance to allow equipment to be moved. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution after passing arrangements have been made. VHF-FM Channels: 13, 16, and 88, POC: (251) 957-6019 Valid 2026-08-17 to 2027-04-12. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, TERRITORIAL SEA - SECTOR MOBILE, SUBMERGED LAND ACT (SLA) General / Miscellaneous Gulf of America - Temporary Buoy --- --- A temporary SOFAR spotter buoy will be established in the Gulf of America in approximate position 30-19.22N 087-08.44W. The buoy will feature a 2.5 second flashing amber light at night. Mariners should transit the area with caution. Valid 2026-08-15 to 2027-08-14. Position 30-19.22N 087-08.43W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-3FF469SÉCURITÉARANSAS BAY ALTERNATE ROUTE - ARANSAS BAY General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Aransas Bay - GIWW - Breakwater and Shoreline Protection --- --- Shoreline protection work will be conducted in the vicinity of Deadman Island in Aransas Bay. Work will take place 24-hours a day, 7-days a week, and will consist of the construction of riprap breakwater, the placement of imported sand fill material, and the installation of six daybeacons in and around Deadman Island. Operations will take place in an area bound by approximate positions: 28-03.62N 096-58.72W, 28-04.99N 096-57.62W, 28-03.13N 096-58.02W, 28-03.99N 096-57.22W. On-scene vessels will include a push boat, the M/V KEISHA, and the Crew Boats BO26, BO33, and MARINE. Mariners are urged to transit the area at their slowest safe speed to minimize wake. VHF-FM Channel: 16, POC: (469) 964-7804 Valid 2026-08-12 to 2026-12-01. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-8947DFSÉCURITÉNEW ORLEANS HARBOR - NEW ORLEANS TO BATON ROUGE General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Mississippi River - Marine Construction --- --- Marine construction will be conducted at CF Industries Blue Point, near Mile 184.4, RDB, AHOP, for the construction of a heavy haul bridge. Work will take place during daylight hours, 7-days a week. On-scene vessels will include a Bo-Mac Crane Barge and multiple deck barges. Mariners are requested to transit the area at their slowest safe speed to minimize wake. VHF-FM Channel: 68, POC: (985) 634-7031 Valid 2026-08-12 to 2027-02-28. Position 30-11.27N 091-01.32W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-5A633BSÉCURITÉHOUSTON SHIP CHANNEL - CEDAR BAYOU CHANNEL General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Cedar Bayou Channel - Barge Mooring Area --- --- A temporary barge mooring area will be located along the Cedar Bayou Channel, between approximate positions 29-41.30N 094-57.56W and 29-41.26N 094-57.46W. Six piles will be installed every 100 ft for the mooring and staging of loaded and empty deck barges. Mariners are urged to transit the area at their slowest safe speed to minimize wake and proceed with caution. Valid 2026-08-11 to 2027-02-28. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-1D4501SÉCURITÉLAKE SALVADOR - BAYOU PEROT General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Bayou Perot - GIWW - Rock Barge Loading and Fleeting Area --- --- A rock barge fleeting area and light-loading operation will take place inside the entrance of Bayou Perot near GIWW Mile 20.0, WHL. The fleet and light-loading operation will be set up on the south bank. On-scene vessels will include the M/V LIL AL CENAC and barges. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution after passing arrangements have been made. VHF-FM Channels: 13 and 72, POC: (504) 628-0846 Valid 2026-08-11 to 2027-07-30. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-D6E78ESÉCURITÉHOUSTON SHIP CHANNEL - CEDAR BAYOU CHANNEL General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Cedar Bayou Channel - Barge Mooring Area --- --- A temporary barge mooring area will be located along the Cedar Bayou Channel, between approximate positions 29-41.19N 094-57.63W and 29-41.15N 094-57.66W. Three piles will be installed every 100 ft for the mooring and staging of loaded and empty deck barges. Mariners are urged to transit the area at their slowest safe speed to minimize wake and proceed with caution. Valid 2026-08-11 to 2027-02-28. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-AE4EB0SÉCURITÉSECTOR MOBILE, TERRITORIAL SEA - SECTOR MOBILE, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Portersville Bay - Mississippi Sound - Marine Construction --- --- The Coffee Island Living Shoreline Project will take place in Portersville Bay. Operations will consist of the placement of riprap to create a 9,300 ft overlapping segmented breakwater on the southeast shoreline of Coffee Island (Isle aux Herbes). On-scene vessels will include, but are not limited to, push boats, barges, material handlers, and transport vessels. Mariners are requested to transit the area at no-wake speed. VHF-FM Channels: 12 and 16, POC: (251) 751-4127 and 251-895-6378 Valid 2026-08-10 to 2027-05-01. Position 30-20.07N 088-15.13W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-67CB6BSÉCURITÉSECTOR NEW ORLEANS, TERRITORIAL SEA - SECTOR NEW ORLEANS, SUBMERGED LAND ACT (SLA) General / Autonomous Vessel Operations Gulf of America - Unmanned Surface Vessel Operations --- --- Hydrological survey operations will be conducted in the waters offshore from central Louisiana in the Gulf of America. The survey area boundaries are between 3 nm and 12 nm from shore, bound by approximate positions: 29-27.60N 091-43.20W, 29-15.00N 091-50.40W, 29-01.20N 091-25.20W and 29-00.00N 090-44.40W. Surveys will be conducted 24-hours a day, using a 30 ft unmanned maritime system. Mariners are urged to transit the area with caution. POC: USCG Morgan City (985) 397-3300 Valid 2026-08-05 to 2026-12-01. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-DB8754SÉCURITÉMOBILE BAR - MOBILE CHANNEL General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Mobile Channel - Dock Construction --- To: December 2028 --- Dock construction will be conducted at the Choctaw Point Container Terminal located along the western edge of the Mobile Channel. Work will consist of the demolition of existing structures, pile driving, and new wharf construction. Operations will take place from approximately 7:00 a.m. to 5:30 p.m., Monday through Saturday. Construction work will be performed from crane and deck barges adjacent to the McDuffie Coal Terminal. All barges will be serviced by an on-scene push-boat. Mariners are urged to use extreme caution when navigating the work area, maintain a minimum 50 ft clearance from all vessels, and transit at their slowest safe speed. VHF-FM Channel: 16, POC: (813) 393-8184 or (904) 422-9964 Valid 2026-08-01 until further notice. Position 30-39.40N 088-01.95W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-E561DDSÉCURITÉPENSACOLA BAY - PENSACOLA-MOBILE General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes GIWW, Mile 177.8, EHL - Pensacola Bay - Shoreline Restoration --- --- Shoreline restoration will take place near Sherman Inlet and Magazine Point, along the GIWW and Pensacola Bay. Shoreline restoration, material transfer, and breakwater construction activities will take place within the project area. Material will be mechanically removed from Robertson Island, near GIWW, Mile 177.8, EHL, and transferred by barges to various beaches and nearshore sites located in the vicinity of the GIWW and Pensacola Harbor channels. Additional work will consist of breakwater construction and the planting of submerged aquatic vegetation. Breakwater structures will be constructed in close proximity to the GIWW near the Sherman Cove Inlet. Work will be conducted 24-hours a day, 7-days a week. On-scene vessels will include four push boats, six barges, and four crew transfer skiffs. Mariners are requested to transit the area at no wake speed and proceed with caution. VHF-FM Channels: 12 and 16, POC: (251) 747-5591, (205) 616-6845, or (251) 504-6537 Valid 2026-07-27 to 2026-11-20. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-ED28B7SÉCURITÉHOUSTON SHIP CHANNEL - BAYPORT SHIP CHANNEL General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Bayport Ship Channel - Dock Construction --- To: Until Further Notice --- Dock construction is being conducted outside the Bayport Ship Channel between the Bayport Land Cut and Bayport Terminal 1. Crews and equipment will be working waterside on Wharf 1 during daylight hours only, from 6:30 a.m. to 7:00 p.m. The T/V ALICE (no AIS) will be on-scene acting as an assist vessel. Vessels, including harbor tugs, are requested to transit the area at their slowest safe speed to minimize wake. VHF-FM Channel: 13, POC: (310) 221-2427 Valid 2026-07-27 until further notice. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-32CF82SÉCURITÉMOBILE CHANNEL - FOWL RIVER General / Marine Construction (Excluding Bridges) / Dredging Mobile Bay – Fowl River – Dredge Operation --- --- Hydraulic dredging and marsh placement will be conducted south of the Fowl River Access Channel. Work will take place 24-hours a day, Monday through Friday. On-scene equipment and vessels will include 8,500 feet of dredge pipe, the Dredge BLACKHAWK and Tender Boats PIN OAK and TODD MICHAEL. Mariners should watch for signs designating the 16 inch submerged plastic pipeline. Vessels are urged to transit with extreme caution, as underwater dredged material will be present and used to remediate and shape the marsh. Mariners are requested to coordinate passing arrangements in advance, maintain a safe distance from all project equipment, and transit the work area with caution. VHF-FM Channels: 13, 16 and 77, POC: (832) 217-0541 Valid 2026-07-27 to 2026-11-30. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- NEW ORLEANS PORT ARTHUR General / MSIB GIWW, Mile 238.5, WHL - Calcasieu Lock - Lock Hazard Advisory --- To: Until Further Notice --- Surveys have indicated corrosion and degradation of the structural sheetpile skin plate existing below the waterline of the northeast longwall dolphin at the Calcasieu Lock. Therefore, mariners are to use extreme caution in the vicinity of the lock and avoid contact with the northeast longwall dolphin. POC: (337) 477-1482 or (504) 862-2060 Valid 2026-07-23 until further notice. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-5863C4SÉCURITÉSECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes GIWW - Breakwater Construction --- --- Breakwater construction will be conducted along the GIWW, between Miles 405.4 and 417.6, WHL. On-scene vessels will include hopper barges, towing vessels, spud barges, and crew boats. Mariners are urged to transit the project area at their slowest safe speed to minimize wake and proceed with caution. VHF-FM Channel: 16, POC: (337) 519-2759 or (337) 519-8883 Valid 2026-07-21 to 2027-01-30. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LOWER OLD RIVER - ATCHAFALAYA RIVER General / Bridges / Repairs, Painting, Or Fender Replacement Atchafalaya River - Bridge Repairs --- --- The Krotz Springs Railroad (UPRR) Bridge crossing the Atchafalaya River, Mile 41.5, will undergo repairs and maintenance work. Two hour advance notice will be required for the bridge to open each day, between 4:00 p.m. and 6:00 a.m., the following morning. The bridge will open on signal at all other dates and times. Mariners should contact the bridge tender for updates related to this work. Valid 2026-07-20 to 2026-12-28. Position 30-32.33N 091-44.77W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-D6D1AESÉCURITÉMOBILE BAR - MOBILE CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Mobile Channel - Dredge Operation --- --- The Dredge BALTIMORE will conduct maintenance dredging operations in the Mobile Channel from south of the McDuffie Coal Terminal to Mobile Channel Light 49 (LLNR-6510). Operations will be conducted 24-hours a day, 7-days a week. Dredged material will be hauled offshore to the Ocean Dredge Material Disposal Site (ODMDS) located south of Dauphin Island, AL. On-scene equipment and vessels will be staged along the channel and include dredge pipe, the Scows 4002, 6001, 6002, 6003, 6004, and BR8, the T/Vs ELIZABETH ANN, PATRICIA JEAN, AMY HERBERT, and COLONEL, the M/Vs MISS TAMI JO and MISS CATE, a fuel barge, a 200 ft by 60 ft crane barge, the Crew Boat SEA SUB, and the Survey Vessel MITCHELL. The dredge will operate on four anchors and on spuds, which will limit the dredge's maneuverability. Portions of the channel will be obstructed during dredging. Vessels should coordinate passing arrangements at least 1-hour in advance to allow equipment to be moved. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution after passing arrangements have been made. VHF-FM Channels: 13, 16, and 88, POC: (251) 957-6019 Valid 2026-07-19 to 2027-04-12. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-CC49A9SÉCURITÉGALVESTON BAY ENTRANCE CHANNEL - HOUSTON SHIP CHANNEL General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Houston Ship Channel - Dock Construction --- To: January 2027 --- Dock construction is being conducted along the Houston Ship Channel at City Docks 20 and 21. Work will take place from shore and waterside with divers and crews working under the docks at various times. Mariners should transit the area with caution and at their slowest safe speed to minimize wake. POC: (832) 926-2215 or (346) 341-4518 Valid 2026-07-17 until further notice. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-F3C2C7SÉCURITÉEAST BAY TO WEST BAY - EAST BAY General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes East Bay - Oyster Reef Installation --- --- Six oyster reef breakwater units will be installed in East Bay along Tyndall Air Force Base. Work will take place Monday through Friday, during daylight hours. The submerged breakwater structures will be installed at least 25 ft seaward of the existing grass meadow. The oyster reef breakwater units will be submerged in water depths of 4 to 5 ft, with the top of each structure 0.56 ft below the current mean low water level. Up to three navigation signs will be installed along the outer limits of the oyster reef sites. On-scene vessels will include a crane barge, a deck barge, a spud barge, work skiffs, the T/Vs STORM CAT and LLOYD W, and the Crew Boat SWAMP ANGEL. Mariners are urged to transit the area at their slowest safe speed to minimize wake and maintain a safe distance from the reef installation site. VHF-FM Channel: 16, POC: (850) 960-4839 Valid 2026-07-13 to 2026-12-31. Position 30-03.45N 085-31.45W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026