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Navigation Notices

  • MKARNS NAVIGATION NOTICE - SWL 23-43

    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 NAVIGATION NOTICE - SWL 23-42

    The Joe Hardin Lock (No. 3) NM 50.2 closure detail that was previously noted in Nav Notice SWL 23-28 has been revised. The lock will now be closed to traffic beginning at 7 a.m. on September 11, 2023, until 7 p.m. on September 15, 2023. This is to allow workers to upgrade the lock interlock system which is an integral safety function of the Lock.

  • MKARNS NAVIGATION NOTICE - SWL 23-41

    James W. Trimble Lock (No. 13) NM 292.8 will be closed to traffic beginning at 6 a.m. on August 8, 2023, until 6 p.m. on August 9, 2023. This is to allow workers to make repairs to the downstream land wall tainter valve piping.

  • MKARNS NAVIGATION NOTICE SWL 23-40

    SAILING INSTRUCTIONS NEAR FT. SMITH, AR HWY 64/GARRISON ST. BRIDGE (NM 308.4) MCCLELLAN-KERR ARKANSAS RIVER NAVIGATION SYSTEM

  • MKARNS Navigation Notice - SWL-23-39

    SPECIAL LOCKING INSTRUCTIONS COLONEL CHARLES D. MAYNARD LOCK (No. 5) NM 86.3 MCCLELLAN-KERR ARKANSAS RIVER NAVIGATION SYSTEM

  • MKARNS NAVIGATION NOTICE - SWL 23-38

    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.

  • MKARNS NAVIGATION NOTICE  -  SWL 23-37

    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. Vessels may contact Montgomery Point Lock and Dam on Channel 16 for further information.

  • NAVIGATION NOTICE - SWL 23-35

    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 NOTICE - SWL 23-34

    Mariners should expect to experience intermittent delays at Dardanelle Lock (No. 10) NM 205.5 on July 25, 2023. The intermittent delays are to allow needed repairs to sections of hydraulic lines associated with lock operations. A subsequent navigation notice will be issued should the work be completed ahead of schedule. However, unforeseen issues could require additional delays.

  • NAVIGATION NOTICE Number SWL 23-16 McClellan-Kerr Arkansas River Navigation System

    Notices to Navigational Interests (NTNI) https://ntninotices.usace.army.mil/lpwb/f?p=150:1: This is to advise mariners transiting the White River Entrance Channel (WREC) of increased head differentials between Norrell Lock and Dam and Montgomery Point Lock and Dam. At 7:00 p.m. today, the tailwater elevation at Norrell Lock and Dam was 146.42 ft-msl and the headwater elevation at Montgomery Point Lock and Dam was 143.10 ft-msl with a differential of 3.32 feet. The WREC differential is forecasted to increase to 4.0 feet by 30 March 2023. The differential is expected to begin decreasing after 01 April 2023. A subsequent navigation notice will be issued once the differential is forecasted to decrease below and remain below 3.0 feet. Mariners are reminded of advised tow restrictions during increased differentials.