Burlington Northern Railroad, Dakota Division 7th Sub: Boylston, WI to Coon Creek, Minnesota. This is an interesting hand drawn map, with hand-written notes, of the 7th Sub. 13 detailed pages of the line (see example page to the right) from Boylston, Wisconsin 120 miles to Coon Creek, Minnesota. The 7th Sub is basically just outside of Superior, Wisconsin Southwest to just short of Minneapolis. 18 pages total. This looks like an engineer drew this by hand (no date is listed) and includes notes about how long sidings are or signals rules and notes on how to contact the yard master.
This is a scan of an original hand drawn map of the 7th Sub. 18 pages. The original was hand-drawn and used by railroad personnel on the line. It does show imperfections as the original was hand drawn.