EXHIBIT 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 10-K/A into the registrant's previously filed Registration Statement Nos. 2-97014, 33-42276, 33-50958, 33-60264, 33-62944, 33-54859, and 33-55105. ARTHUR ANDERSEN LLP Portland, Oregon August 30, 1995