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  • 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.

  • MKARNS Nav Notice No. 25-55 Sailing Instruction Lock 8 Downstream Approach

    Due to shoaling, mariners are advised that until further notice, both upbound and downbound tows should favor the long wall in the downstream approach to Toad Suck Lock (No. 8) NM 155.9.

  • MKARNS Nav Notice No. SWL 25-54 Lock 10 and Lock 13 Special Locking Instructions

    Mariners are advised of special locking instructions due to ongoing construction and limited lock availability at Dardanelle Lock (No. 10) NM 205.5 and James W. Trimble Lock (No. 13) NM 292.8.

  • MKARNS Nav Notice No. 25-53 Lock Crew Changes

    Towboats requesting to make crew changes or to have goods or services delivered at Little Rock District navigation locks (Montgomery Point Lock and Dam, L&D’s 1-13) on the McClellan-Kerr Arkansas River Navigation System are asked to comply with the procedures listed below, as detailed in the MKARNS Annual Navigation Notice #1, Appendix D:

  • 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.

  • 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 25-17 Lock 2 Tow Haulage Return to Service

    The tow haulage equipment at Lock No. 2 (NM 13.3) has been repaired and returned to service.

  • 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.