US Army Corps of Engineers
Rock Island District Website

Illinois Waterway

Consolidated Lock Closures

The Illinois Waterway, which provides a navigable connection between Lake Michigan and the Mississippi River, includes eight lock and dam sites which are long overdue for significant repairs. In order to facilitate repairs, the U.S. Army Corps of Engineers, Rock Island District developed a consolidated repair schedule, which includes a short closure to locks in 2019 followed by two extended closures in 2020 and 2023. The closures are scheduled to take place simultaneously to lessen impact to commercial navigation as much as possible.  

All lock and dam facilities on the Illinois Waterway have a single lock chamber for passing vessels. During the scheduled closures, no vessels will be able to pass through the affected locks. An exception to this restriction could occur at the LaGrange and Peoria locks if water levels become high enough that the wicket portions of the dams could be lowered for open-pass. This would allow vessels to pass around the dam without using the lock. There is no guarantee river levels will be high during the closures. Navigation on the rest of the river, between the locks, will not be impacted by the closures. Recreational and commercial vessels will be able to navigate within the pools without restriction. 



Closure Schedule


The upcoming Illinois Waterway 2020 Consolidated Lock Closures no longer include a closure at Brandon Road Lock and Dam near Joliet, Illinois.

Originally, six extended lock closures were planned for the summer of 2020 in order to complete long overdue maintenance on the aging infrastructure. Due to significant workload, the contractors involved are unable to undertake the maintenance work at Brandon Road Lock and Dam. Consequently only five lock closures are now slated to include Starved Rock, Marseilles, Dresden Island, Peoria and LaGrange Locks and Dams.


LaGrange Lock and Dam – Major Rehabilitation & Lock Machinery Replacement

  • Full closure scheduled July 1-Sept. 30

Peoria Lock and Dam – Dewatering for Maintenance and Inspection

  • Full closure scheduled July 6 - Sept. 30 (Updated 10/21/2019)

Starved Rock Lock and Dam – Upper & Lower Miter Gate Installation

  • Full closure scheduled July 1-Oct. 29 (Updated 8/2/2019)

Marseilles Lock and Dam – Upper Miter Gate Installation

  • Full closure scheduled July 6-Oct. 29 (Updated 10/21/2019)

Dresden Island & Brandon Road Lock and Dam (see schedule change notice above)  – Upper Bulkhead Recess Installation

  • Partial Closure scheduled July 6-Oct. 3 and Oct. 25-Oct. 28 (Updated 10/21/2019)
    • Locks operational from 6 p.m. to 6 a.m. with a 70-ft width restriction and no ability to pull unpowered barges.
  • Full Closure scheduled Oct. 4-Oct. 24 (Updated 10/21/2019)

Dresden Island & Brandon Road Lock and Dam – Upper Miter Gate Installation

  • Full closure scheduled July 1-Sept. 30
  • If construction projects were approved and funded as part of the Great Lakes Mississippi River Interbasin Study at Brandon Road (GLMRIS-BR), it is possible they could be completed during this closure.

**NOTE: Projects and dates listed on this schedule are subject to change due to river levels and project funding. 

Additional Information

Currently, no work is scheduled in 2020 at the three locks closest to Lake Michigan (Brandon Road, Lockport and T.J. O’Brien), if there are unforeseen failures, maintenance needs or construction requirements that occur between now and the scheduled closures in 2020 and 2023, the work will be coordinated to coincide with the scheduled closures as much as possible.


Questions concerning the scheduled 2020 lock closures may be directed to 309-794-5729 or