Re: Seacouver, Washington: take 3
BTW, I found what looks to me like the best fit to your description:
http://tinyurl.com/yqxj7w
It's on the Pacific Coast in Jefferson County (though just barely), with two rivers meeting, and the combo flowing a little way to the ocean.
Mind you, the coast there (as throughout Jefferson county and Clallam county to its north) is Bad News™ for ships, being full of rocks, massive kelp, and such. Also, most of that coast is a cliff.
Still, you can fudge things if you want. No reason not to channelize Fisher Rapids and cut across that big loop down into Grays Harbor County.