Certainly not good news, but also not unexpected. I suspect "Alternative 1" will receive less enthusiastic support from the counties that don't have the flooding problems (because they didn't build in their flood plains).
QIN, Chehalis Tribe will probably oppose it. Grays Harbor County Commission may go for Alternative 1, even if the citizens aren't on board. Commissioner Raines is a vocal dam supporter, and I don't know where the others stand now.

If Thurston County jumps on the bandwagon, we'll know the fix is in. Still time for this to end well.