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  • MKARNS Nav Notice No. SWL 25-23 Caution Advisory - HWY 64 Bridge NM 300.4 Update

    The hydrodemolition project over the navigation channel of the HWY 64 Bridge, as noted in Navigation Notice SWL 25-22, has been postponed due to weather. The project is now scheduled to occur from 7 a.m. to 7 p.m. on April 5, 2025.

  • MKARNS Nav Notice No. SWL 25-22 Caution Advisory - HWY 64 Bridge NM 300.4

    Mariners are advised that a hydrodemolition project is scheduled over the navigation span of the HWY 64 Bridge, NM 300.4, from 7 a.m. to 7 p.m. on April 3, 2025. During this time mariners should contact the onsite workboat at VHF Channel 16 or 68, or by phone at (479) 629-2996 prior to arrival to coordinate a work stoppage to allow for safe passage under the bridge.

  • MKARNS Annual Navigation Notice No. 1-2025

    As a result of partnering efforts with navigation stakeholders, the attached consolidated Notice to Navigation Interests has been prepared for the McClellan-Kerr Arkansas River Navigation System (MKARNS). The intent is to provide consistency by reviewing and informing current district regulations with a joint notice that will be updated annually. The notice is applicable to the Little Rock (SWL) and Tulsa (SWT) Districts.

  • MKARNS Nav Notice No. SWL 25-14 Lock 3 Unscheduled Closure

    Due to issues with the Tainter valve equipment, Joe Hardin Lock (No. 3) NM 50.2 is currently closed to traffic. Crews are onsite and will have the Lock reopened as soon as the repairs are completed. A subsequent Navigation Notice will be issued once the Lock has been opened to traffic.

  • 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.

  • MKARNS Nav Notice No. SWL 24-89 Norrell Lock tow haulage repaired

    The tow haulage equipment at Norrell Lock (No. 1) NM 10.3 has been repaired and returned to service.

  • MKARNS Nav Notice No. SWL 24-88 Norrell Lock tow haulage out of service

    The tow haulage equipment at Norrell Lock (No. 1) NM 10.3 is currently out of service due to an electrical issue. 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 24- 87 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.

  • MKARNS Nav Notice No. SWL 24- 85 Lock 10 Special Sailing Instruction - Width Restrictions

    The upstream riverside/long wall miter gate at James W. Trimble Lock (No. 13) NM 292.8, is failing

  • MKARNS Nav Notice No. SWL 24- 84 Lock 7 Tow Haulage Planned Outage

    The tow haulage equipment at Murray Lock (No. 7) NM 125.4 will be taken out of service on December 2, 2024 to facilitate work on the new tow haulage system.