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MKARNS Navigation Notices

Current navigation and sailing notices for the McClellan-Kerr Arkansas River Navigation System

18 Locks & Dams
10 Navigation Pools
445 Miles of Waterway
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David D. Terry L&D MRER

⚠ Important Navigation Information

Mariners: Check notices regularly for current channel conditions, restrictions, and safety information.

For the most up-to-date navigation information, visit the Notices To Navigation Interests (NTNI) website.

Navigation Notices

  • MKARNS Nav Notice No. SWL 25-12 Lock 4 Closure

    Mariners are advised that Emmett Sanders (No. 4) NM 66.0 will be closed to traffic beginning at 8:00 a.m. until 4:00 p.m. on February 26, 2025. The lock closure is required to facilitate ongoing work on the hydraulic system.

  • MKARNS Nav Notice No. SWL 25-11 Lock 9 Tow Haulage Planned Outage

    The tow haulage equipment at Ormond Lock (No. 9) NM 176.9 will be taken out of service beginning February 15, 2025, to facilitate required work on the lock shelters. Double cut tows will have to be locked the conventional way (without the use of tow haulage). A follow up notice will be distributed when the tow haulage equipment is back in service.

  • MKARNS Nav Notice No. SWL 25-10 Lock 10 Intermittent Delays

    Mariners should expect to experience intermittent delays at Dardanelle Lock (No. 10) NM 205.5 on February 6, 2025 between the hours of 7:00 a.m. and 5:30 p.m. daily. The intermittent delays are required to facilitate an underwater ROV inspection of the upstream river wall.

  • MKARNS Nav Notice No. SWL 25-09 Lock 3 Closure

    Mariners are advised that Joe Hardin Lock (No. 3) NM 50.2 will be closed to traffic beginning at 7:00 a.m. until 4:00 p.m. on February 12, 2025. The lock closure is required to facilitate ongoing work on the hydraulic system.

  • MKARNS Nav Notice No. SWL 25-08 Lock 4 Tow Haulage Return to Service

    The tow haulage equipment at Emmett Sanders (No. 4) NM 66.0 has been repaired and returned to service.

  • MKARNS Nav Notice No. SWL 25-06 Lock 9 Tow Haulage Return to Service

    The tow haulage equipment at Ormond Lock (No. 9) NM 176.9 has been repaired and returned to service.

  • MKARNS Nav Notice No. SWL 25-05 Lock 13 Tow Haulage Out of Service

    The tow haulage equipment at James W. Trimble (No. 13) NM 292.8 is currently out of service. Double cut tows will have to be locked the conventional way (without the use of tow haulage). A follow up notice will be distributed when the tow haulage equipment is back in service.

  • MKARNS Nav Notice No. SWL 25-03 Lock 7 Reopened

    Repairs to the hydraulic piping at Murray Lock and Dam (No. 7) NM 125.4 have been completed. The lock is currently open to traffic.

  • MKARNS Nav Notice No. SWL 25-02 Lock 7 Closure

    Due to an unexpected hydraulic piping failure, Murray Lock and Dam (No. 7) NM 125.4 is currently closed to navigation until further notice. Crews are onsite making emergency repairs at this time. A follow up notice will be distributed as soon as the Lock is reopened to navigation.

  • MKARNS Nav Notice No. SWL 24-93 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.

Navigation Notices Archive