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Duluth Lake Superior Harbor

BOTTLE DIGGING GRAY AREA CONFIRMED

Where: Minnesota · approx. 46.79, -92.1 (vicinity only)

Why this spot: 1880s+ Sanborn-mapped town on Lake Superior

What turns up: Boomtown harbor debris: embossed brewery, soda, and druggist bottles, stoneware, and dock-era glass in privy pits and fill along the old waterfront, Rice's Point, and the St. Louis River estuary flats.

Access: Gray area.

The bed of Lake Superior below the ordinary high-water mark is state-owned public trust where removing historic artifacts is restricted; harbor fill, docks, and uplands are private or municipal and require the owner's permission. Minnesota law protects archaeological sites and unmarked burials.

Open in Mudlark Map →

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.

Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.