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, 33-60629, 333-26595, 333-30327, 333-48733, 333-56667, 333-92399, 333-36180 and 333-54558. /s/ ARTHUR ANDERSEN LLP Portland, Oregon June 22, 2001