Navigation Notice: Upper Mississippi River
IENC Chart Update
Dikes 290.1R, 289.7R & 289.4R
Upper Mississippi River mile 290.1 - 289.4
NOTICE NUMBER: 19126 / 22-02
EFFECTIVE: 03/23/2022 00:00 thru 06/30/2022 23:59 CDT
- Dikes 290.1R, 289.7R, and 289.4R were found on a recent multibeam survey to be longer than previously shown on the Inland Electronic Navigation Chart (IENC). Dike 290.1R is extended 220-ft, dike 289.7R is extended 450-ft, and dike 289.4R is extended 475-ft towards the channel with less than 5-ft of water over these areas. The IENC has been updated to show the actual length of these structures.
- The attached drawing shows the updated IENC chart with the old end of dike locations noted for comparison.
- Mariners should update IENC U37UM218 on their electronic chart software.
FOR THE DISTRICT ENGINEER:
Andrew C. Schimpf, P.E.
Rivers Project Manager