Navigation Notice: Lower Mississippi River

Revetment Operations Schedule


NOTICE NUMBER: 17928 / 14257-8
EFFECTIVE DATE: 06/12/2021 06:00 thru 04/08/2022 19:00 CST


10 January 2022 - Amendment 14257-8 Updates attached schedule
31 December 2021 - Amendment 14257-7 Updates attached schedule
8 November 2021 - Amendment 14257-6
21 October 2021 - Amendment 14257-5
14 September 2021 - Amendment 14257-4 Updates attached schedule
28 July 2021 - Amendment 14257-3 Updates attached schedule
14 July 2021 - Amendment 14257-2 Updates attached schedule

Revetment operations are scheduled to start on the Mississippi River 14 June 2021 with the Clearing and Snagging Unit at Wolf Island mile 933 followed by the Bank Grading Unit 1 July at Peters mile 691. The Mat Sinking Unit will begin operations for the season 18 July at Wolf Island mile 933-R. Limits of operations are expected to be LMR mile 933 Wolf Island to LMR mile 58 Myrtle Grove and Atchafalaya mile 14 McCrea and mile 45 Big Bayou Graw. Moves for floating plant will be indicated on the schedule attached to this publication and its updates. Season completion is anticipated on or about  8 April 2022 at LMR mile 345.1-L Railroad Landing. Channel restrictions will be estimates based on previous work in these bend ways and actual conditions assessed when the MSU plant is set up and test tows and or pilot evaluations are available to ensure safe navigation. The M/V Harrison and M/V William James will be contact vessels for the Mat Sinking Unit operation. They will monitor channel 13 (above Baton Rouge) and channel 67 (below Baton Rouge), 24 hours/day while sinking operations are ongoing. The MSU will pass any tows which can be passed safely during working hours (typically 6am to 7pm. Exceptions as posted in MSIBs). Restrictions will be relaxed with USCG coordination when the MSU is not in operation. The attached schedule represents the order of work for the Mat Sinking Unit, Clearing and Snagging Unit and Bank Grading Unit. Mat sinking operations generally have the most significant restrictions on the navigation channel, with grading operations generally impacting the channel to a lesser extent and clearing and snagging operations having little to no impact. These operations are vital to maintaining reliability and integrity of the navigation channel and river banks with the work often occurring in the most restrictive and most problematic reaches of the river. General information and a video explaining the work can be found at