Exhibit 15

February 13, 2006

Securities and Exchange Commission

450 Fifth Street, N.W.

Washington, D.C. 20549

Commissioners:

We are aware that our report dated February 13, 2006 on our review of interim financial information of PacifiCorp and its subsidiaries as of and for the period ended December 31, 2005 and included in the Company’s quarterly report on Form 10-Q for the quarter then ended is incorporated by reference in its Registration Statement on Form S-3 (No. 333-91411).

Very truly yours,

PricewaterhouseCoopers LLP