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       海角涩区 Dividend Reinvestment
                         and Stock Purchase Plan

         333-84200       海角涩区 debt securities,
                         preferred stock, depositary shares, common stock and
                         warrants

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

File No. 033-60667       海角涩区 Parity Investment Bonus

         333-00429       海角涩区 Savings Fund Plan for
                         Salaried Employees

         333-36840       海角涩区 Savings Fund Plan for
                         Salaried Employees

         333-76392       海角涩区 Non-Officer Restricted
                         Stock Plan

         333-76394       海角涩区 2002 Stock Plan


/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
Pittsburgh, Pennsylvania
March 19, 2002