Portland Sanborn Fire Insurance Maps
This book contains maps of all of Portland within city limits in 1889, including outlines of structures on each lot at the time of printing. This is a first-issue book.
These books were printed all over the country to set insurance rates. They also indicate what the buildings are made of because that is a fire concern and what sets the rates. These books are extremely useful to researchers.
Norm Gholston, Preservation Programs Manager for the AHC, shows the first map in the Portland Sanborn Insurance book.
