I found these old survey maps on the BLM site. They take forever to load and not every section is covered but they are a look back in time. The first link is to the state map index. Scroll over it and the township range numbers come up. Click on it and wait, then the cadastral maps will give a jpg image. Did I mention that they take forever to load.
http://www.blm.gov/or/landrecords/survey/yGrdOr_A.php?ln=1110001Here is a link to the t 080s r060e map. It is one of the newer maps and is very interesting.
http://www.blm.gov/or/landrecords/survey/yPlatView1_2.php?path=POR&name=t080s060e_001.jpg
Bill