I've worked on a number of these log weir projects as well as multi-plate culvert replacement projects on a number of streams in the Puget Sound. Common sense does not prevail when it comes to engineers. They are doing a good job of placing materials in the stream that are native to rivers, such as using smooth agregate rocks instead of quarry rock. But in the case of the Hoh the previous quarry rock that was in place lasted for a long time. They should have used more in conjuction with the log ties.

In regards to the earlier post, the fill used on the Hoh project below the log ties is good material, just not good for stopping a river of this magnitude. Regardless of the material it is not going to hold up unless they use larger rock. My guess would be that they will be adding large quarry rock to bank the existing fill.