Item 54826 - 235-311 Forest Avenue, Portland, 1924 Item 54826 - 235-311 Forest Avenue, Portland, 1924 Contributed by City of Portland - Planning & Development Item 54826 Zoom 4668px x 3366px - 15.6"w x 11.2"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Power Plant at 235-311 Forest Avenue in Oakdale, Portland, was owned by Winslow & Company in 1924. Show Details