Old River Control Structure
and Atchafalaya River
NOTICE NUMBER: 12241
LOCAL NUMBER: MVN 20-139
EFFECTIVE: 08/05/2020 07:00 thru 08/05/2020 17:00 CDT
On 5 August 2020, between the hours of 7:00 a.m. and 5:00 p.m., the U.S. Army Corps of Engineers will significantly increase the diversion of water through the Old River Control Structures.
This diversion will increase the stage and velocity on the Atchafalaya River in the vicinity of Simmesport, Louisiana (and to lesser amounts downstream and upstream). These effects will occur between 8:00 a.m. and 6:00 p.m. Also, the draw through the Old River Control Structures (mile 311-315 Above Head of Passes of the Mississippi River) will increase.
Mariners should exercise extreme caution when navigating through these areas during the above-mentioned time period.
Wesley M. Sisung, for:
Steven G. Patorno
Chief, Technical Support Branch