Hi,

According to what you are saying kelly avenue is a Urban Minor Collector? osm.wiki/Oregon/Highway_Classification

Could you give a link to how places are classified? It's kind of odd that it doesn't really say.

Sure, but Vancouver junction exists on it and is not there.

Powell's Valley is older than Gresham it's self, it had a post office, then it's logging town status was taken away, as it was too close to Portland.

I believe this is the center location of the old logging town

historic maps show a lake named beaver lake in this spot.