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  • MKARNS Nav Notice No. SWL 25-50 Dardanelle Hinged Pool Operation

    To promote beneficial scouring of shoals in the Dardanelle Pool following recent sustained high-water flows, the U.S. Army Corps of Engineers, Little Rock District, will conduct a “Hinged Pool” operation from Thursday, July 10th, 2025, through Wednesday, July 17th, 2025.

  • MKARNS Nav Notice No. SWL 25-44 Lock 5 Tow Haulage Out of Service

    The tow haulage equipment at Colonel Charles D. Maynard Lock (No. 5) NM 86.3 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 25-43 Lock 1 Navigation Pass Open (Through Lock)

    The tailwater elevation at Norrell Lock (No. 1) NM 10.3 has exceeded 143.0 feet. All vessels will be directed to transit through the lock chamber with pinned open gates while the tailwater elevation remains above 143.0 feet.

  • MKARNS Nav Notice No. SWL 25-41 Lock 9 Closure - High flows

    Due to high flows on the McClellan-Kerr Arkansas River Navigation System, the Arthur V. Ormond Lock (No. 9) NM 176.9 is closed to traffic. The lock will reopen as the flows drop to safe navigation levels.

  • MKARNS Nav Notice No. SWL 25-38 Lock 1 Dewater Canceled

    The dewatering operation, scheduled for the fall of 2025, at Norrell Lock and Dam (NM 10.3) has been canceled.

  • MKARNS Nav Notice No. SWL 25-36 Lock 9 Reopened

    Arthur V. Ormond Lock (No. 9) NM 176.9 has reopened to navigation traffic.

  • MKARNS Nav Notice No. SWL 25-35 Lock 9 Closure - High Flows

    Due to high flows on the McClellan-Kerr Arkansas River Navigation System, the Arthur V. Ormond Lock (No. 9) NM 176.9 is closed to traffic. The lock will reopen as the flows drop to safe navigation levels.

  • MKARNS Nav Notice No. SWL 25-34 Lock 1 Navigation Pass Open (Through Lock)

    The tailwater elevation at Norrell Lock (No. 1) NM 10.3 has exceeded 143.0 feet. All vessels will be directed to transit through the lock chamber with pinned open gates while the tailwater elevation remains above 143.0 feet. When the tailwater elevation drops below 143.0 feet, vessels will use the lock. Prior to arrival, vessels shall contact lock personnel at (501) 324-7341 or on channel 16 to receive the latest information regarding any changes to the special navigation procedures at Lock 1.

  • MKARNS Nav Notice No. SWL 25-33 Lock 1 Tow Haulage Out of Service

    The tow haulage equipment at Norrell Lock (No. 1) NM 10.3 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 25-32 Lock 1 Operational

    Due to tailwater elevations falling below 143.0 feet at Norrell Lock (No. 1) NM 10.3, the lock chamber is now operational for navigation. All vessels are required to pass through lock.