I don't think any change should honestly be done till they decide what to do.
See:
WSDOT officials said they are considering three options. One of the options is to keep the bridge closed and not replace it, one is to build a replacement bridge in the same area, and the third option involves “re-routing SR 165 on a new alignment to east or west of Carbon River Canyon,” the release said.
Till we know what they decide, I'd say leave the route as-is.