Columbia River

Yellow Mineral / Hump island – Mt St H 43m

Mile 58.3 Both Bank Geologic

Source Data

Left bank: Yellow Mineral

Right bank: Hump island - Mt St H 43m

Notes: Fisher Island Slough

Memorial Contribution Documented by Robert Heacock (1957–2025), from Wind Hard from the West: The Lewis and Clark Expedition on the Snake and Columbia Rivers (2015), used by permission of his family.

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