Exhibit 23
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statements listed below of our reports dated February 27, 2006 relating to the consolidated financial statements, financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting, which appear in this Form 10-K.
| On Form S-3: |
Relating to: | |||||
| File No. | 333-75148 | ÁñÁ«ÊÓƵ Dividend Reinvestment and Stock Purchase Plan | ||||
| 333-108131 | ÁñÁ«ÊÓƵ Dividend Reinvestment and Stock Purchase Plan | |||||
| 333-112257 | ÁñÁ«ÊÓƵ Debt Securities, Preferred Stock and Depository Shares, Common Stock, Warrants, Stock Purchase Units and Stock Purchase Contracts Registration Statement | |||||
| On Form S-8: |
Relating to: | |||||
| File No. | 333-76394 | ÁñÁ«ÊÓƵ 2002 Stock Plan | ||||
| 333-99257 | ÁñÁ«ÊÓƵ Savings Fund Plan for Salaried Employees | |||||
| 333-125221 | ÁñÁ«ÊÓƵ 2005 Stock Incentive Plan | |||||
| /s/ PricewaterhouseCoopers LLP |
| Pittsburgh, Pennsylvania |
| February 27, 2006 |