Listen to those on the ground.
The U.S. Army Corps of Engineers was warned by multiple sources early in the year that major flooding was likely on the Missouri River.
But by the time officials moved to "evacuate" upstream reservoirs in anticipation of snowmelt, they were hampered by downstream flooding that prevented them from releasing more water, internal emails show.
In January, corps officials were aware of above-average snowpacks in the Rocky Mountains. And they had National Weather Service reports showing that soil conditions had water saturations as high as 99 percent in much of the Dakotas and Montana.
https://www.argusleader.com/story/n...x-river-missouri-river-2011-flood/3245108002/
if I’m not mistaken instead of increasing the releases earlier they did the opposite and lowered the releases from garrison to around 7000 around feb/march.