Meridian Street: Start of repair contract
Photo from City of Boston Archives
License: Creative Commons Attribution-NonCommercial (CC BY-NC)
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BH Photo #316132
Monetary value is probably small.
If they are clean and visually interesting, individual pages could be scanned, resized, and reproduced as art prints.
It's likely that an historical society, harbor museum, or library would want to preserve the originals for future study.
I have the original blue prints for this bridge, is there any value to them?