Here is the Coast Range Association’s Benton County old growth and native Google Earth file. The file shows all BLM native forest in Benton County. When you view the overlays in Google Earth, zoom in to around 1,500 foot elevation and you will see small white squares appear south of the town of Alsea. Click on a square and a Panoramio photos will appear and you will see various shots of old growth forest. Check them out.
The file is zipped. Download the zipped file, unzip, and open with Google Earth.
The link to the Bnton County Google Earth file is HERE