Michigan
Alpena (Thunder Bay lumber and cement port)
Tidal mudflat Source-confirmed findsGray area
What you could find
Reported finds from this shoreline.
Old bottlesAlso reported: druggists, mill and dock debris along the river mouth..
Photos via Wikimedia Commons: Sheila Sund (CC BY 2.0).
Why this spot
1880s+ Sanborn-mapped town on Thunder Bay River at Thunder Bay, Lake Huron
Coverage from 1884; the river mouth and old mill district are the focus.
Keep exploring nearby
More spots in this area.