Notice to Navigators: Upper Mississippi River

RIAC UM172   Reopened, for now

The channel is being re-opened to traffic now.

At some point, possibly later today, another one or two hour closure will be needed to complete this work; TBD



RIAC UM172   Last closure 20APR - Extended ETC???

Sent: Wed 4/20/2022 9:50 AM
The blasts went off about 0930, and the towers on both sides of the river are still standing. There’s a need to extend this closure while the demo contractor forms a new plan to finish the job. No estimate of how long that will take at this time, I will update as soon as I get new information


RIAC UM172 Last closure 20APR 0800-1000


Sent: Tuesday, April 19, 2022 1:54 PM
Last closure for this project, 0800 to 1000 Wednesday 20APR, to implode the old highline towers. USCG will issue a BNM to start the closure.


Sent: Sunday, April 17, 2022 7:10 AM
A closure today, Easter Sunday, as planned: 0800-1200. USCG will issue a BNM. Re-opened the channel at 1145


Sent: Saturday, April 16, 2022 1:16 PM
The river will re-open at 1700 today Sat 16APR, USCG will issue a BNM

Then a closure is needed 0800 to approx. 1200 tomorrow 17APR to complete the installation of the static lines

Then a closure 0800 to approx. 1000  on Wednesday 20APR while the old towers are knocked down by blasting.

And then the river crossing part of this Ameren project will be complete


Sent: Saturday, April 16, 2022 7:09 AM
The closure today, Saturday 16APR,  will be from 1000 to 1700, USCG will make a BNM

The contractor needs to complete a task before they start flying across the river at 1000


Sent: Friday, April 15, 2022 1:07 PM
Just confirmed with the Ameren team, a river closure tomorrow 0800-1600, USCG will announce the closure with a  BNM.


Sent: Thursday, April 14 5:28 PM

No closure Friday, tentative now 0800-1600 on Saturday 16APR


Sent: Wednesday, April 13 7:21 AM

Now tentative for 0830 to 1630 on Friday 15APR.

There is a chance this full day of work could complete the river crossing part of Ameren’s project on Friday. If not,  another 0830 until completion will be needed on Saturday 16APR.


Sent: Monday, April 11 7:09 AM

As of this morning, Thursday 14APR is the first day a river closure would be needed to complete this project.

Rain today and Wednesday in the forecast


Sent: Saturday, April 9, 2022 7:33 AM

As of this morning, the earliest this work will occur is Tues-Wed next week 12-13APR. And there is rain in the forecast for those days


Sent: Thursday, April 7, 2022 10:04 AM

At this time we are tentative to have a closure 0830 to 1600 on Sunday 10APR, will update Saturday morning.

It will take about two days to complete this work, there is a chance of rain Mon. Tues, Wed next week.


Bernie Heroff
Port Captain Navigation/Training
ARTCo – Ag Services and Oilseeds
American River Transportation Co., LLC
P.O. Box 2889
Saint Louis, MO 63111
t 314 481 8828 / m 314 803 4644