Hi Ken,
As has already been mentioned, the Elwha's restoration to date has been nothing short of miraculous; the various processes have been going as expected with the exception that they are happening faster than was predicted. That said, the restoration of Ediz Hook is not entirely driven by Elwha sediments. It is most severely affected by beach armoring between the Elwha and Ediz Hook and by the armoring of the hook itself. 
The erosion and re-nourishment of Ediz Hook is too big a topic for the space available here but if you'd care to visit the Fiero Marine Life Center on City Pier any of our people would be happy to discuss it with you; come in on Saturday and I'll visit with you personally (ask for Alex).
Restoratively yours,
Alex