Winter Lockage Hours: Lock and Dam #11 UMR 583.0 Thru Lock and Dam #22 UMR 301.2
Notice Number: 201634/MR 22-201634
Date: 12/13/2022 08:00 thru 03/03/2023 16:00
Locks 11, 14, 16, 17, 18, and 20 will be staffed to lock traffic between 0800 and 1600, Monday through Friday during the period from 18 December 2022 through 3 March 2023.
Lock 12 will be closed to navigation from 13 December 2022 thru 3 March 2023. Refer to separate Navigation Notice.
Lock 13 will be closed to navigation from 14 December 2022 thru 6 January 2023. Refer to separate Navigation Notice. Lock will be staffed to lock traffic between 0800 and 1600, Monday through Friday after the closure through 3 March 2023.
Lock 15 will be closed to navigation from 3 January 2023 thru 3 March 2023. Refer to separate Navigation Notice. Lock will be staffed to lock traffic between 0800 and 1600, Monday through Friday during the period from 18 December 2022 through 2 January 2023.
Lock 19 will be closed to navigation from 19 December 2022 thru 3 March 2023. Refer to separate Navigation Notice.
Lock 21 will be closed to navigation from 12 January 2023 thru 2 March 2023. Lock restrictions will occur prior to closure. Refer to separate Navigation Notice.
Lock 22 will be closed to navigation from 13 January 2023 thru 2 March 2023. Lock restrictions will occur prior to closure. Refer to separate Navigation Notice.
Tows requiring a lockage outside of these hours must contact the Lockmaster in advance so that lock operators can be called in to operate the lock. Winter conditions will dictate whether or not a lockage can be accomplished, as well as any necessary restrictions.
Operational Aspects
Rake to box ice couplings the entire width of the tow, at break points of the tow, will be required at all locks when ice is present at the lock.
Double tripping and use of industry helper boats during ice conditions will be required if proper couplings are not accomplished prior to arrival at the locks.
Failure to have the tow configured properly may result in loss of lock turn.
Tow configuration to ice couplings shall not be accomplished at the lock or lock approach.
//signed//
Robert V. Castro, P.E.
Chief, Lock and Dam Section
Mississippi River Project
