21 Oct 2025

MKARNS Nav Notice SWL 25-72 Lock 10 Intermittent Delays

Mariners should expect to experience intermittent delays at Dardanelle Lock (No. 10) NM 205.5 on October 27th, 2025 – October 30th, 2025, between the hours of 6:00 a.m. and 4:30 p.m. The intermittent delays are required to facilitate concrete repairs to the lock walls.

30 Sep 2025

MKARNS Nav Notice SWL 25-71 UPDATED Lock 10 Closure Notice

Mariners are advised that the partial lock closure at Dardanelle Lock (No. 10) NM 205.5 has been extended through October 24th, 2025.

25 Sep 2025

MKARNS Nav Notice SWL 20-70 UPDATED Lock 13 Closure Notice

Update to navigation notice SWL 25-68. Mariners are advised that the partial lock closure at James W. Trimble Lock (No. 13) NM 292.8 has been extended through October 25th, 2025.

11 Sep 2025

MKARNS Nav Notice 25-67 MPLD Nav Pass 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.

5 Sep 2025

MKARNS Nav Notice SWL 25-66 Lock 8 Tow Haulage Return to Service

The tow haulage equipment at Toad Suck Lock (No. 8) NM 155.9 has returned to service.

3 Sep 2025

MKARNS Nav Notice SWL 25-64 Sailing Instructions NM 237.1 to 238.1

Due to shoaling, mariners are advised that until further notice, both upbound and downbound tows should favor the red buoys from NM 237.1 to 238.1.

25 Aug 2025

MKARNS Nav Notice SWL 25-61 Lock 9 Sailing Instructions Lifted

The sailing instructions for the downstream approach to Arthur V. Ormond Lock (No. 9) NM 176.9, noted in Nav Notice SWL 24-19 have been lifted.

22 Aug 2025

USACE successfully closes stuck gate at Dardanelle Lock and Dam

The U.S. Army Corps of Engineers Little Rock District has successfully closed spillway gate 20 at Dardanelle Lock and Dam on the Arkansas River.

22 Aug 2025

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.

21 Aug 2025

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.