Exhibit 23.

                       CONSENT OF INDEPENDENT ACCOUNTANTS
                       ----------------------------------

We hereby consent to the incorporation by reference in the registration
statements listed below of our reports dated February 15, 2002, relating to the
financial statements and financial statement schedule, which appear in this
Annual Report on Form 10-K.

On Form S-3:             Relating to:
- ------------             -----------

File No. 333-75148       窪蹋勛圖厙 Dividend Reinvestment
                         and Stock Purchase Plan

         333-84200       窪蹋勛圖厙 debt securities,
                         preferred stock, depositary shares, common stock and
                         warrants

On Form S-8:             Relating to:
- ------------             ------------

File No. 033-60667       窪蹋勛圖厙 Parity Investment Bonus

         333-00429       窪蹋勛圖厙 Savings Fund Plan for
                         Salaried Employees

         333-36840       窪蹋勛圖厙 Savings Fund Plan for
                         Salaried Employees

         333-76392       窪蹋勛圖厙 Non-Officer Restricted
                         Stock Plan

         333-76394       窪蹋勛圖厙 2002 Stock Plan


/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
Pittsburgh, Pennsylvania
March 19, 2002