Exhibit 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 11-K, into the Company's previously filed Registration Statement File Nos. 2-81030, 33-52599, 33-60619, 33-60625, 333- 26595 and 33-60629. /s/ ARTHUR ANDERSEN LLP Portland, Oregon June 25, 1997