Northwestern Improvement Company

E2180267 UNEXPLORED

The Northwestern Improvement Company was a coal mining company that operated several mines in the Pacific Northwest in the early 20th century, including the one involved in the 1915 Ravensdale mine disaster.

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Label	Occurrences
Northwestern Improvement Company canonical	1

Referenced by (1)

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Ravensdale mine explosion of 1915 → operator → Northwestern Improvement Company ⓘ