Columbia County topographic maps

Average elevation: 46 m

Average elevation: 27 m

Average elevation: 391 m

Average elevation: 76 m

The city has been severely impacted by floods on multiple occasions. The rains that caused the Willamette Valley Flood of 1996 flooded Vernonia as well; some homes in the floodplain were elevated, and some flooring materials were replaced, mitigating some damage from later flooding. In 2007, heavy storms that…

Average elevation: 218 m

Average elevation: 31 m

Average elevation: 46 m

Average elevation: 123 m