CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
report  included  in this  Form  10-K  into the  registrant's  previously  filed
Registration  Statement  File  Nos.  2-97014,  33-42276,   33-62944,   33-62317,
333-10987, 333-53695, 333-53715 and 333-73157.

                              /s/ Arthur Andersen LLP
Portland, Oregon,
  March 15, 1999