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  • MKARNS Nav Notice No. SWL 25-28 Lock 1 Nav Pass Open (Over Weir)

    The tailwater elevation at Norrell Lock (No. 1) NM 10.3 has exceeded 155.0 feet. The buoy line has been removed and all vessels shall pass over the weir between the channel marker lights, as directed by lock personnel.

  • MKARNS Nav Notice No. SWL 25-26 Lock 8 Tow Haulage Out of Service

    The tow haulage equipment at Toad Suck Lock (No. 8) NM 155.9 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 25-25 Caution Advisory - HWY 64 Bridge NM 300.4 Update #2

    The hydrodemolition project over the navigation channel of the HWY 64 Bridge, as noted in Navigation Notice SWL 25-23, has been postponed due to weather.

  • MKARNS Nav Notice No. SWL 25-24 Lock 8 and 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 and Toad Suck Ferry Lock (No. 8) NM 155.9 are closed to traffic.  The locks will reopen as the flows drop to safe navigation levels.

  • USACE issues small craft advisory for Arkansas River

    The U.S. Army Corps of Engineers is issuing a small craft advisory for the McClellan-Kerr Arkansas River Navigation System in Arkansas. Heavy rain in Oklahoma and western Arkansas over the last two days has resulted in Arkansas River flows exceeding 70,000 cubic feet per second. A crest of 150,000 to 200,000 c.f.s is forecasted from Van Buren to Ozark and a crest of 250,000 to 300,000 c.f.s is forecasted to progress downstream from Dardanelle to Wilbur D. Mills Dam over the next week.

  • 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 Nav Notice No. SWL 25-21 Lock 9 DS Appr- Sailing Instruction Lifted

    The sailing instructions for both upbound and downbound tows to favor the long wall in the downstream approach to Arthur V. Ormond Lock (No. 9) NM 176.9, noted in Nav Notice SWL 24-19, have been lifted.

  • MKARNS NAVIGATION NOTICE Number SWL 25-20

    The tow haulage equipment at James W. Trimble (No. 13) NM 292.8 has been repaired and returned to 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.