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  • MKARNS Nav Notice SWL 26-19 Lock 10 Intermittent Delays

    Mariners may expect to experience intermittent delays at Dardanelle Lock (No. 10) NM 205.5 on June 9th, 2026 – June 11th, 2026. Intermittent delays are required to perform a survey of the lock chamber.

  • MKARNS Nav Notice SWL 26-18 Lock 07 and 08 Intermittent Delays

    Mariners may experience intermittent delays at Murray Lock (No. 7) NM 125.4 and Toad Suck Lock (No. 8) NM 155.9 on May 4th, 2026 through June 15th, 2026, between the hours of 7:00 a.m. and 5:30 p.m. daily. The intermittent delays are required to facilitate dredging and dive inspections in preparation of the 110’ stoplog conversions

  • MKARNS Nav Notice SWL 26-17 Scheduled Lock Closure (Multiple Locations)

    A partial lock closure is scheduled for James A. Trimble Lock (No.13) NM 292.8, Ozark Jetta-Tayor Lock (No. 12) NM 256.9, Dardanelle Lock (No. 10) NM 205.5, Arthur V. Ormond Lock (No. 9) NM 176.9, Toad Suck Lock (No. 8) NM 155.9, and Murray Lock (No. 7) NM 125.4 beginning June 15th, 2026, through September 30th, 2026. During this time, the Locks will be closed daily between the hours of 7:00 a.m. and 7:00 p.m. The Locks will be opened to traffic each night between the hours of 7:00 p.m. and 7:00 a.m., however a 70-ft width restriction will be in place.

  • MKARNS Nav Notice 26-14 Lock 7 Tow Haulage Return to Service

    The tow haulage equipment at Murray Lock (No. 7) NM 125.4 has returned to service.

  • MKARNS Nav Notice SWL 26-12 Lock 2 Tow Haulage Return to Service

    The tow haulage equipment at Lock No. 2 (NM 13.3) has been repaired and returned to service.

  • MKARNS Nav Notice SWL 26-11 MPLD NavPass Open

    Due to increased river elevations, the crest gate dam at Montgomery Point Lock and Dam (NM 0.5) is lowered and the navigation pass is open.

  • MKARNS Nav Notice SWL 26-08 MPLD Unscheduled Closure

    Due to issues with the hydraulic system, Montgomery Point Lock and Dam (NM 0.5) is currently closed to traffic. Crews are onsite investigating the issue and will reopen the lock as soon as the repairs are completed. A subsequent Navigation Notice will be issued when the lock is reopened.

  • MKARNS Nav Notice SWL 26-07 MPLD Nav Pass Closed

    Due to falling river elevations, the crest gate dam at Montgomery Point Lock and Dam (NM 0.5) is in operation and the navigation pass is closed. All vessels are required to pass through the lock until further notice.

  • MKARNS Nav Notice SWL 26-04 MPLD NavPass Closed

    Due to falling river elevations, the crest gate dam at Montgomery Point Lock and Dam (NM 0.5) is in operation and the navigation pass is closed.  All vessels are required to pass through the lock until further notice.

  • MKARNS Nav Notice SWL 26-03 MPLD NavPass Open

    Due to increased river elevations, the crest gate dam at Montgomery Point Lock and Dam (NM 0.5) is lowered and the navigation pass is open. When the Montgomery Point Lock and Dam tailwater elevation drops below 115 ft, the navigation pass will be closed.