The Elwha dam in Washington State (USA) is being torn down. Now scientists from the University of Washington want to find out what will happen to the sediment built up behind the dam in the past 100 years. They have been making careful observations of what the sea and seabed are like off of the mouth of the river and will be monitoring how they change. They think it will mostly go down into the depths, but aren't sure. The current conditions are that it is near the surface, but the main part of the sediment hasn't started moving yet. Whatever I imagine that the results will be unexpected.

The story is on phys.org.

Bill Gill

"Salmon are beginning to swim up the Elwha River for the first time in more than a century."

If salmon return to the rivers in which they were spawned it is interesting that there are some out there exploring what must be new territory.