POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Alan B. Arends hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Alan B. Arends Alan B. Arends POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Rockne G. Flowers hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Rockne G. Flowers Rockne G. Flowers POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Joyce L. Hanes hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Joyce L. Hanes Joyce L. Hanes POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Lee Liu hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Lee Liu Lee Liu POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Katherine C. Lyall hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Katherine C. Lyall Katherine C. Lyall POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Arnold M. Nemirow hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Arnold M. Nemirow Arnold M. Nemirow POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Milton M. Neshek hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Milton M. Neshek Milton M. Neshek POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Jack R. Newman hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Jack R. Newman Jack R. Newman POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Judith D. Pyle hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Judith D. Pyle Judith D. Pyle POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Robert D. Ray hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Robert D. Ray Robert D. Ray POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Robert W. Schlutz hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Robert W. Schlutz Robert W. Schlutz POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Wayne H. Stoppelmoor hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Wayne H. Stoppelmoor Wayne H. Stoppelmoor POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, That I Anthony R. Weiler hereby constitute and appoint Erroll B. Davis, Jr. and Edward M. Gleason, and each of them individually, my true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for me and in my name, place and stead, in any and all capacities, to sign my name as a director of Alliant Energy Resources, Inc. (the "Company") and Alliant Energy Corporation (the "Parent") to the Registration Statement on Form S-4, and any amendments (including post-effective amendments) or supplements thereto, relating to an offer to exchange substantially identical unsecured debt securities and related guarantees that are registered under the Securities Act of 1933, as amended, for up to $250,000,000 aggregate principal amount of unsecured debt securities to be issued by the Company and unconditionally guaranteed by the Parent, after the consummation of the private placement of such debt securities, and to file said Registration Statement, and any amendment (including any post-effective amendment) or supplement thereto, with the Securities and Exchange Commission in connection with the registration of the unsecured debt securities and related guarantees under the Securities Act of 1933, as amended. I hereby ratify and confirm all that said attorneys-in-fact and agents, or each of them, have done or shall lawfully do by virtue of this Power of Attorney. WITNESS my hand this 20th day of October, 1999. /s/ Anthony R. Weiler Anthony R. Weiler