Notice to Navigators: Chicago Harbor Lock Closure

Lock Closure for Hydraulic Motor Repairs
Chicago Harbor Lock

EFFECTIVE: 04/12/2022 06:00 thru 16:00 CDT


  1. The Chicago Harbor Lock will be closed to all vessel traffic starting at 0600 CDT Tuesday, April 12th, 2022 through 1600 CDT Tuesday, April 12th, 2022 for the repair of the hydraulic motor seal on the Southeast Sector Gate machinery.
  2. In the event the repair is completed prior to the scheduled end time, an amendment to this Notice to Navigation Interests will be posted.
  3. The following link provides access to:

All USACE Notices to Navigation Interest

  1. If you have any questions/comments/concerns regarding this Notice to Navigation Interests, please contact Michael Walsh, USACE Chicago District Waterway Project Office Chief, (815) 510-0361 or



Jeffrey A. MacDonald, P.E.
Chief, Technical Support Branch