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  • MKARNS Nav Notice SWL 25-60 Lock 10 Reopened

    The mechanical issues at Dardanelle Lock (No. 10) NM 205.5 have been resolved and the lock is opened to traffic.

  • MKARNS Nav Notice SWL 25-58 Safety Zone Military Exercise NM 289.0 – NM 292.8

    To ensure the safety of life and property during the military river crossing exercise, a Safety Zone will be established by the U.S. Coast Guard for the Arkansas River from NM 289.0 to NM 292.8.

  • MKARNS Nav Notice 25-59 Lock 10 Unscheduled Closure

    Dardanelle Lock (No. 10) NM 205.5 is currently closed to traffic due to dangerous cross currents downstream of the dam. The spillway release configuration is currently restricted due to mechanical issues resulting in concentrated flows that present a danger to traffic in the downstream approach. Crews are onsite and an additional notice will be submitted when the issue is resolved.

  • MKARNS Nav Notice 25-57 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 p.m. on August 16, 2025 to 7 a.m. on August 17, 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 Nav Notice No. 25-56 Lock 4 Tow Haulage Out of Service

    The tow haulage equipment at Emmett Sanders (No. 04) NM 66.0 is currently out of service due to ongoing work. 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.

  • USACE lifts small craft advisory for Arkansas River

    The U.S. Army Corps of Engineers is lifting the small craft advisory for the Arkansas River. Small craft advisories are issued when flows reach 70,000 cubic feet per second.

  • 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 25-42 Lock 9 Reopened

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

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

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