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.

24 Sep 2025

MKARNS Nav Notice SWL 25-69 Caution Advisory MPLD DS Approach

Mariners are advised that significant shoaling has occurred in the downstream approach at Montgomery Point Lock and Dam (NM 0.5). Crews are onsite performing dredging and clamming operations, and the contract dredge is scheduled to arrive next week. A subsequent navigation notice will be issued once the shoaling has been cleared.

24 Sep 2025

MKARNS Nav Notice 25-68 UPDATE: SCHEDULED LOCK 13 CLOSURE NOTICE

Mariners are advised that the partial lock closure at James W. Trimble Lock (No. 13) NM 292.8 has been extended through October 18th, 2025. During this time, the Lock will be closed daily (Monday thru Saturday) between the hours of 7:00 a.m. and 7:00 p.m. The lock will be opened to traffic each night between the hours of 7:00 p.m. and 7:00 a.m., and all day on Sundays, however a 70-ft width restriction will be in place.

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.

4 Sep 2025

MKARNS Nav Notice SWL 25-65 Caution Advisory NM 291.6 I-49 Bridge

Mariners are advised that work/crane barges will be positioned outside the left descending navigation channel beginning on or around September 17, 2025, for the start of construction of the Interstate-49 Bridge at NM 291.6 just downstream of James W. Trimble Lock and Dam (No. 13).

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.