I have a feeling the location might present some problems if it should rain... a lot.
Or if global warming creates an exceptional fast and furious runoff. ;-)
Well ok ;)
You said -- "I have a feeling the location might present some problems if it should rain... a lot."
Well, it's a lot of rain and snow that feeds the Columbia River, all the way back up into Canada. I've been at the beginning of the river in Canada, on the Athabasca Glacier where it starts.
And there's lots of rain and snow in the mix, all the way down to the Pacific Ocean. They've got the dams controlling the river from Canada down to the Pacific Ocean (where it comes out at Astoria). It's not like it was when the wagon trains came through -- not anymore.
Regards,
Star Travelers