MKARNS Navigation Notices

28 Jul 2026

MKARNS Nav Notice SWL 26-27 Lock 13 Early Closure

Mariners are advised that due to a critical construction activity related to the 110 ft. stoplog conversions, the daytime closure at James W. Trimble Lock (No. 13) NM 292.8 will begin at 5:00 a.m. on Monday August 3rd, 2026, and Friday August 7th, 2026.

22 Jul 2026

MKARNS Nav Notice SWL 26-26 Lock 1 Repair Closure

Mariners are advised that Norrell Lock (No. 1) NM 10.3 will be closed to traffic beginning at 6:00 a.m. until 2:00 p.m. on July 29th, 2026. The lock closure is required to facilitate concrete repair of the lock parapet wall.

22 Jul 2026

MKARNS Nav Not 26-25 Lock 13 Early Closure

Mariners are advised that due to a critical construction activity related to the 110 ft. stoplog conversions, the daytime closure at James A. Trimble Lock (No. 13) NM 292.8 will begin at 5:00 a.m. on Wednesday July 29th, 2026.

22 Jul 2026

MKARNS Nav Notice 26-24 Multiple Location Locking Instructions

SPECIAL LOCKING INSTRUCTIONS MULTIPLE LOCATONS MCCLELLAN-KERR ARKANSAS RIVER NAVIGATION SYSTEM Due to ongoing construction at the following locations on the McClellan-Kerr Arkansas River Navigation System •Murry Lock (No.7) NM 125.4 •Toad Suck Ferry Lock (No. 8) NM 155.9 •Arthur V. Ormond Lock (No. 9) NM 176.9 •Dardanelle Lock (No. 10) NM 205.5 •Ozark Jetta-Taylor Lock (No. 12) NM 256.9 •James W. Trimble Lock (No. 13) NM 292.8

13 Jul 2026

MKARNS Nav Notice 26-23 Lock 1 Intermittent Delays

Mariners should expect to experience intermittent delays at Norrell Lock (No. 1) NM 10.3 July 13, 2026 – July 17, 2026, between the hours of 6:00 a.m. and 6:00 p.m. The intermittent delays are required to facilitate work on the hydraulic system.