For a river like the Hoh, logjams either natural or engineered are not static features. The Hoh is a dynamic river system that likes to move around its floodplain and unforunately for both the river and us, roads can't seem to be far away enough to avoid washouts. There is a fair amount of wood that gets moved around throughout the system with each high water event. Oftentimes it is the single logs and logjams just sitting on top of a gravel bar that get washed away. The logjams that have been around for some time are always composed of wood of all different sizes all grouped in interlocking matrices that continue to increase in size. These kinds of logjams seem to be more prevalent on the bends of the river where the force of the water keeps it pinned in place.

Anyways, I just want to comment that ELJs on the Hoh in particular don't seem to be highly successful. That is quite a bit of $$$ going into fairly ephemeral projects. I'm not too sure that this new ELJ project could really be considered a success. Just downstream of the 6 wingjams is a section of riverbank that gets shaved during every high flow. Eventually the river will come close enough to the highway that either rip rap or something else will have to be used to shore up that section. But that will take quite a few years to happen.