An interesting aerial view of the Northwest Industrial District showing proposed routes of NW Front and Yeon Avenues. At this time Front stopped at Nicolai Street (lower left corner) and Yeon had not yet been built. Yeon would meet St. Helens Road at the foot of Forest Park.
(City of Portland Archives)
Vintage Portland 
Looks like the fill is still settling in Guild’s Lake.
Here’s a map to get you started: http://binged.it/Y18BUY
I spotted two buildings that are still standing.
The building with Imperial Paints: http://goo.gl/maps/F3uVR
The building with Schoolhouse Electric: http://goo.gl/maps/TRJBM
Here’s a ground-level view of Nicolai & Yeon from an earlier VP post: https://vintageportland.wordpress.com/2012/02/14/nw-yeon-nicolai-1943/
The building in the lower left corner with the white tower on the roof is the old Coffee Bean International building. Still standing today. I used to work there.