1. 1845: The first settlers arrive in Columbia County, Oregon. 2. 1854: The first post office is established in St. Helens. 3. 1859: The first school is established in St. Helens. 4. 1867: The first newspaper, the Columbia County News, is published in St. Helens. 5. 1876: The first bridge is built across the Columbia River at St. Helens. 6. 1883: The first railroad is built in Columbia County. ...
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