I moved here from southern Nevada in October 2015, and I’ve wondered about the street names “Mill Plain” and “Fourth Plain.” — Debbie
Where do the names “Mill Plain” and “Fourth Plain” come from? What happened to First, Second and Third Plain? — Ted
Debbie and Ted, you aren’t the only ones interested in the Plain truth about the area’s earliest mapping practices.
It was the most commonly asked question when we launched our new “Clark Asks” feature.
Those missing First, Second and Third Plains? They’re just part of a system of topographical references that evolved more than 150 years ago around what’s now the Fort Vancouver National Historic Site.