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MKARNS Navigation Notices

Current navigation and sailing notices for the McClellan-Kerr Arkansas River Navigation System

18 Locks & Dams

10 Navigation Pools

445 Miles of Waterway

Mariners: Check notices regularly for current channel conditions, restrictions, and safety information.

For the most up-to-date navigation information, visit the Notices To Navigation Interests (NTNI) website.

Navigation Notices

Archive: January, 2026

23 Jan 2026
MKARNS Nav Notice SWL 26-04 MPLD NavPass Closed
Due to falling river elevations, the crest gate dam at Montgomery Point Lock and Dam (NM 0.5) is in operation and the navigation pass is closed. All vessels are required to pass through the lock until further notice.
20 Jan 2026
MKARNS Nav Notice SWL 26-03 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.
7 Jan 2026
MKARNS Nav Notice SWL 26-02 Lock Closure Forecast - 2026
The purpose of this Navigation Notice is to provide forecasted lock closures for the 110-ft Stoplog Conversion projects in 2026. The information below is considered tentative and the closure details could change depending on site conditions, construction means and methods and other variables.