The photo above shows the Boise River behind the Hilton Garden Inn in Eagle.
The enormous gravel deposit in the photo didn’t exist prior to the 2006 flooding in the Eagle Island area.
And, this gravel deposit became even larger this past Spring with the 8,000+ cfs river flows.
I am not a hydrologist, but it seems logical to me that this huge gravel deposit has to be impeding high water flows in the north channel of the river.
That, in turn, seems likely to cause water to back up further east (upstream), forcing more water to flow through the smaller south channel.
Any obstruction, especially one of this size, surely increases the risk of flooding further upstream.
Are the appropriate governmental agencies considering dredging this gravel deposit to restore better water flow?
The time to do it is now ~ when river flows are at their lowest.
I can only imagine the numerous regulations that would have to be overcome to achieve this objective.