4 Jun 2025

MKARNS Nav Notice No. SWL 25-40 Lock 13 Closure Notice

A partial lock closure is scheduled for James W. Trible Lock (No. 13) NM 292.8 beginning June 15th, 2025, through September 30th, 2025. During this time, the Lock will be closed daily 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., however a 70-ft width restriction will be in place.

4 Jun 2025

MKARNS Nav Notice No. SWL 25-39 Lock 10 Closure Notice

A partial lock closure is scheduled for Dardanelle Lock (No. 10) NM 205.5 beginning June 15th, 2025, through September 30th, 2025. During this time, the Lock will be closed daily 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., however a 70-ft width restriction will be in place.

3 Jun 2025

MKARNS Nav Notice No. SWL 25-38 Lock 1 Dewater Canceled

The dewatering operation, scheduled for the fall of 2025, at Norrell Lock and Dam (NM 10.3) has been canceled.

29 May 2025

MKARNS Nav Notice No. SWL 25-36 Lock 9 Reopened

Arthur V. Ormond Lock (No. 9) NM 176.9 has reopened to navigation traffic.

28 May 2025

MKARNS Nav Notice No. SWL 25-35 Lock 9 Closure - High Flows

Due to high flows on the McClellan-Kerr Arkansas River Navigation System, the Arthur V. Ormond Lock (No. 9) NM 176.9 is closed to traffic. The lock will reopen as the flows drop to safe navigation levels.

27 May 2025

MKARNS Nav Notice No. SWL 25-34 Lock 1 Navigation Pass Open (Through Lock)

The tailwater elevation at Norrell Lock (No. 1) NM 10.3 has exceeded 143.0 feet. All vessels will be directed to transit through the lock chamber with pinned open gates while the tailwater elevation remains above 143.0 feet. When the tailwater elevation drops below 143.0 feet, vessels will use the lock. Prior to arrival, vessels shall contact lock personnel at (501) 324-7341 or on channel 16 to receive the latest information regarding any changes to the special navigation procedures at Lock 1.

21 May 2025

MKARNS Nav Notice No. SWL 25-33 Lock 1 Tow Haulage Out of Service

The tow haulage equipment at Norrell Lock (No. 1) NM 10.3 is currently out of service. Double cut tows will have to be locked the conventional way (without the use of tow haulage). A follow up notice will be distributed when the tow haulage equipment is back in service.

21 May 2025

MKARNS Nav Notice No. SWL 25-32 Lock 1 Operational

Due to tailwater elevations falling below 143.0 feet at Norrell Lock (No. 1) NM 10.3, the lock chamber is now operational for navigation. All vessels are required to pass through lock.

20 May 2025

MKARNS Nav Notice No. SWL 25-31 Lock 5 DS Appr - Sailing Instruction

Due to shoaling, mariners are advised that until further notice, both upbound and downbound tows should favor the long wall in the downstream approach to Colonel Charles D. Maynard Lock (No. 5) NM 86.3.

2 May 2025

MKARNS Nav Notice No. SWL 25-30 Lock 9 Tow Haulage Return to Service

The required work on the lock shelters is complete and the tow haulage equipment at Ormond Lock (No. 9) NM 176.9 has been returned to service.