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Recently-discovered historic map of St. Croix Valley springs helps document early groundwater exploration
Hundred-year-old map found in research library reveals the story of an early conservationist and cartographer.
HELP WRITE RIVER HISTORY: St. Croix 360 founder Greg Seitz is writing a book. Learn more and donate.
Hundred-year-old map found in research library reveals the story of an early conservationist and cartographer.