EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 28th day of January, 1997. Richard Bacon Director Subscribed and sworn to before me this 28th day of January, 1997 by Richard Bacon. Martha Murray Notary Public My Commission Expires: 11-19-00 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 28th day of January, 1997. E. R. Brooks Director Subscribed and sworn to before me this 28th day of January, 1997 by E. R. Brooks. Martha Murray Notary Public My Commission Expires: 11-19-00 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 28th day of January, 1997. Paul J. Brower Director Subscribed and sworn to before me this 28th day of January, 1997 by Paul J. Brower. Martha Murray Notary Public My Commission Expires: 11-19-00 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 28th day of January, 1997. Glenn Files Director Subscribed and sworn to before me this 28th day of January, 1997 by Glenn Files. L. J. Jimmerson Notary Public My Commission Expires: May 11, 2000 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 28th day of January, 1997. Tommy Morris Director Subscribed and sworn to before me this 28th day of January, 1997 by Tommy Morris. Martha Murray Notary Public My Commission Expires: 11-19-00 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 31st day of January, 1997. Dian G. Owen Director Subscribed and sworn to before me this 31st day of January, 1997 by Dian G. Owen. Diane K. Nichols Notary Public My Commission Expires: 2-14-99 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 28th day of January, 1997. James Parker Director Subscribed and sworn to before me this 28th day of January, 1997 by James Parker. Martha Murray Notary Public My Commission Expires: 11-19-00 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 2nd day of February, 1997. Ted Steans Director Subscribed and sworn to before me this 2nd day of February, 1997 by Ted Steans. Diane John Notary Public My Commission Expires: October 28, 1997 EXHIBIT 24.16 POWER OF ATTORNEY The undersigned, as a director of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints Floyd W. Nickerson and R. Russell Davis, and each of them severally, his true and lawful attorneys-in-fact and agents, each with full power and authority (acting alone and without the others) to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1996 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorneys-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorneys-in-fact and agents, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 28th day of January, 1997. F. L. Stephens Director Subscribed and sworn to before me this 28th day of January, 1997 by F. L. Stephens. Martha Murray Notary Public My Commission Expires: 11-19-00