14 Apr 2023

NAVIGATION NOTICE Number SWL 23-16 McClellan-Kerr Arkansas River Navigation System

Notices to Navigational Interests (NTNI) https://ntninotices.usace.army.mil/lpwb/f?p=150:1: This is to advise mariners transiting the White River Entrance Channel (WREC) of increased head differentials between Norrell Lock and Dam and Montgomery Point Lock and Dam. At 7:00 p.m. today, the tailwater elevation at Norrell Lock and Dam was 146.42 ft-msl and the headwater elevation at Montgomery Point Lock and Dam was 143.10 ft-msl with a differential of 3.32 feet. The WREC differential is forecasted to increase to 4.0 feet by 30 March 2023. The differential is expected to begin decreasing after 01 April 2023. A subsequent navigation notice will be issued once the differential is forecasted to decrease below and remain below 3.0 feet. Mariners are reminded of advised tow restrictions during increased differentials.

21 Mar 2023

MKARNS NAV NOTICE NO. SWL 23-14 McClellan-Kerr Arkansas River Navigation System increased differentials on the White River entrance channel

This is to advise mariners transiting the White River Entrance Channel (WREC) of increased head differentials between Norrell Lock and Dam and Montgomery Point Lock and Dam.

15 Mar 2023

MKARNS NAV NOTICE NO. SWL 23-13 Tow haulage return to service David D. Terry Lock (No. 6) NM 108.1

The tow haulage equipment at David D. Terry Lock (No. 6) NM 108.1 has been repaired and returned to service.

14 Mar 2023

MKARNS Nav Notice No. SWL 23-12 Lock 6 Tow Haulage Out of Service

The tow haulage equipment at David D. Terry Lock (No. 6) NM 108.1 is currently out of service. Double cut tows will have to be locked the conventional way (without the use of tow haulage). Another notice will be distributed when the tow haulage equipment is back in service.

14 Mar 2023

MKARNS NAV NOTICE NO. SWL 23-11 tow haulage out of service Norrell Lock (No. 1) NM 10.3

During scheduled maintenance to the tow haulage equipment at Norrell Lock (No. 1) NM 10.3, referenced in Navigation Notice SWL 23-08, crews discovered additional components in need of critical repairs. Due to these findings, the tow haulage equipment at Norrell Lock (No. 1) NM 10.3 will remain out of service until repairs can be made.