LIMITED POWER OF ATTORNEY



The undersigned hereby constitutes and appoints each of John R. McArthur

and Arlene S. Graves, or either of them signing singly, and with full

power of substitution, the undersigned's true and lawful attorney in

fact to execute and cause to be filed from time to time with the

United States Securities and Exchange Commission (the "Commission")

and any stock exchange or similar authority in her name, place and

stead reports required pursuant to Section 16(a) of the Securities

Exchange Act of 1934, as amended (Forms 3, 4 or 5) as to her beneficial

ownership of securities and Form 144, Notice of Proposed Sale of

Securities Pursuant to Rule 144 Under the Securities Act of 1933.



This Power of Attorney shall remain in full force and effect until

the undersigned is no longer required to file Forms 3, 4, and 5 or

Form 144 with respect to the undersigned's holdings of and transactions

in securities issued by the Company, and may be relied upon by the

Commission as being in full force and effect until it is notified in

writing or via electronic transmission of such revocation.



IN WITNESS WHEREOF the undersigned has herewith set her hand

on this 11th day of May 2005.



E. Marie McKee