LNM13-6E72B5

SÉCURITÉ

Received: 28 Oct 2026, 00:00Updated: 4 Nov 2026, 18:24

Keywords

Operationsdrilling operation, marine construction

Message content

SECTOR COLUMBIA RIVER, TERRITORIAL SEA - SECTOR COLUMBIA RIVER, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Boring and Core Samples TYPE OF WORK: Marine dive operations at each of six lat-lon coordinates, corresponding to the horizontal directional drill (HDD) exit points of six (6) subterranean conduits for the future housing of up to six buried fiber-optic telecommunications cables. The HDD equipment staging and drilling operations will take place from a single onshore location in Grays Harbor County. Marine activity will be limited to dive operations. LOCATION WHERE WORK WILL BE DONE: Outer Pacific coast of Washington State south of Westport, Grays Harbor County, at six points approximately 0.75 nautical miles offshore Cohassett Beach. LAT/LONG OF MARINE OPERATIONS: (Degrees, Minutes, Seconds – Coordinates in WGS84) Position 1. N46 52 28.3607; W124 08 22.0226 Position 2. N46 52 26.7419; W124 08 22.0186 Position 3. N46 52 25.1255; W124 08 21.8943 Position 4. N46 52 23.5069; W124 08 21.8440 Position 5. N46 52 21.8924; W124 08 21.6716 Position 6. N46 52 20.2860; W124 08 21.3807 CHART NUMBERS: US4WA1EE; US3WA1DE BEGINNING/ENDING DATES: October 15 2026 – February 15 2027 HOURS OF OPERATION: Daylight hours only. Dive operations to be conducted approximately 12 days total during the operational period between October 15 2026 – February 15 2027. EQUIPMENT ON SCENE: Dive support vessel R/V Zephyr with anchor spread. RADIO FREQUENCY VESSEL CAN BE CONTACTED ON: Monitoring VHF Channels 16 and 19. PASSING ARRANGEMENTS/SAFE NAVIGATION DISTANCE: Mariners are requested to keep a minimum ½ nautical mile distance from the dive vessel. To ensure diver safety, any trolled, drift or fixed gear such as pots/traps is requested to remain clear of the dive vessel by a distance of ½ nautical mile. For additional information, please contact: Wolfgang Rain at 206-427-6553 /[email protected] Captain Ron Micjan at 503-632-5553 /[email protected] USCG Northwest District Local Notice to Mariners 44/2026

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