McAlpine Lock Closure (OR 606) – The North (river) chamber will be closed from March 30th thru April 30th for miter gate repairs. All traffic should utilize the South (land) Chamber during this time.
Markland Lock Closure (OR 531.5) – Beginning April 16th locking of the primary chamber has resumed. Work is now being completed on the auxiliary chamber.
Emsworth Lock Closures (OR 6.2) – Beginning April 27th thru Sept. 4th, the auxiliary chamber will be closed daily from 0600 to 2359, and the primary chamber will have intermittent closures for filling valve maintenance.
Chicago/Illinois/Upper Miss
Upper Miss High Water -Several locks are fully open; however, conditions may pose potential hazards. Forecasts do not indicate water levels exceeding closure stages for any locks or bridges.
2026 Planned Illinois River Lockport Closure – Closure of the Lockport Lock, River Mile 291, starting March 31st, 2026, thru May 19th, 2026. Click here for our full guidance.
Illinois River Lockport Re-Opening – ACBL has distributed our annual guidance for accepting release dates above Lockport Lock. Click here for our full guidance.
Lower Miss/Gulf/Canals/Tenn Tom
Lower Miss Operational Impact –
Due to the current river stage and operating conditions, ACBL has implemented draft restrictions listed below.
Loading drafts are not currently reduced NBD Gulf to Cairo.
Tow size has been reduced pending horsepower classification by 9-14% (4-5 barges)
Normal Water Stages:
Caruthersville to Memphis (LM 869- 725): 20′ – 5′
Memphis to Vicksburg (LM 725 – 439): 40′ – 20′
Vicksburg to Natchez (LM 439- 303): 30′ – 10′
Low Water Stages:
Caruthersville to Memphis (LM 869- 725): Below 5′
Memphis to Vicksburg (LM 725 – 439): Below 20′
Vicksburg to Natchez (LM 439- 303): Below 10′
For current river stage information, please refer to the links at the bottom of this page.
Harvey Canal (LM 98.3) – An upcoming 24/7 closure for 7 days is being scheduled. More info to come next week with a minimum of one week advance notice.
Glover Wilkins Lock Closure (TTW 376.3) – Scheduled 30-day closure for routine maintenance will occur from September 9th thru October 10th.
Thad Cochran Lock Closure (TTW 371.1) – Scheduled 30-day closure for routine maintenance will occur from September 10th thru October 10th.
Colorado Lock Closures (WC 440) – Daily closures will take place from 0700-1700, beginning March 17th thru April 22nd for diving operations.
Brazos Lock Closure (WC 401) – As of April 1st, closures are scheduled through June 26th, Monday-Friday, between 1900 and 0700, to allow for repair work.
Inner Harbor Navigation Canal Lock (Industrial Canal Lock EC 1) – Daytime closures from 6:30 AM to 5:00 PM, Monday through Friday, will resume on April 13th thru approx. May 1st for reiver end guide-wall work.
Calcasieu Lock North Chamber Wall Replacement (WC 238) – Beginning May 18th thru Oct. 31st, the Calcasieu Lock will have daytime closures Monday thru Friday for repairs.
