MKARNS Navigation Notices

29 Apr 2026

MKARNS Nav Notice SWL 26-17 Scheduled Lock Closure (Multiple Locations)

A partial lock closure is scheduled for James A. Trimble Lock (No.13) NM 292.8, Ozark Jetta-Tayor Lock (No. 12) NM 256.9, Dardanelle Lock (No. 10) NM 205.5, Arthur V. Ormond Lock (No. 9) NM 176.9, Toad Suck Lock (No. 8) NM 155.9, and Murray Lock (No. 7) NM 125.4 beginning June 15th, 2026, through September 30th, 2026. During this time, the Locks will be closed daily between the hours of 7:00 a.m. and 7:00 p.m. The Locks will be opened to traffic each night between the hours of 7:00 p.m. and 7:00 a.m., however a 70-ft width restriction will be in place.

21 Apr 2026

MKARNS Nav Notice SWL 26-16 Caution Advisory NM 291.6 I-49 Bridge

Mariners are advised that bridge construction falsework is located in the river at NM 291.6, downstream of James W. Trimble Lock and Dam (No. 13). These obstructions will be in place intermittently during the I-49 Bridge construction and may be submerged depending on river conditions.

14 Apr 2026

MKARNS NAVNOT 26-15 Lock 9 Repair Closure

Mariners are advised that Arthur V. Ormond (No. 9) NM 176.9 will be closed to traffic beginning at 6:00 a.m. until 6:00 p.m. on April 21st, 2026. The lock closure is required to facilitate ongoing work on the miter gate operational equipment.