<PAGE>

                                                                      Exhibit 24



                               POWER OF ATTORNEY



KNOW ALL MEN, by these presents, that I, Patrick M. Byrne, hereby make,
constitute and appoint Robert T. Marto and Bonnie B. Stewart, each to be my true
and lawful attorney-in-fact, for and in my name, place and stead, to execute and
deliver the 1996 Annual Report on Form 10-K of White River Corporation, and any
and all amendments thereto; such Form 10-K and each such amendment to be in such
form and to contain such terms and provisions as said attorney shall deem
necessary or desirable; giving and granting unto said attorney, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney, able to be done in and about the
premises as fully and to all intents and purposes as I might or could do if
personally present, hereby ratifying and confirming all that said attorney shall
lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have duly executed these presents this 25th day of
March, 1997.



                                              /s/ Patrick M. Byrne
                                              --------------------
                                               Patrick M. Byrne

<PAGE>

                                                                      Exhibit 24



                               POWER OF ATTORNEY



KNOW ALL MEN, by these presents, that I, Andrew Delaney, hereby make, constitute
and appoint Robert T. Marto and Bonnie B. Stewart, each to be my true and lawful
attorney-in-fact, for and in my name, place and stead, to execute and deliver
the 1996 Annual Report on Form 10-K of White River Corporation, and any and all
amendments thereto; such Form 10-K and each such amendment to be in such form
and to contain such terms and provisions as said attorney shall deem necessary
or desirable; giving and granting unto said attorney, full power and authority
to do and perform any and every act and thing whatsoever requisite, necessary
or, in the opinion of said attorney, able to be done in and about the premises
as fully and to all intents and purposes as I might or could do if personally
present, hereby ratifying and confirming all that said attorney shall lawfully
do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have duly executed these presents this 21st day of
March, 1997.



                                                /s/ Andrew Delaney
                                                ------------------
                                                 Andrew Delaney
<PAGE>

                                                                      Exhibit 24



                               POWER OF ATTORNEY



KNOW ALL MEN, by these presents, that I, Gordon S. Macklin, hereby make,
constitute and appoint Robert T. Marto and Bonnie B. Stewart, each to be my true
and lawful attorney-in-fact, for and in my name, place and stead, to execute and
deliver the 1996 Annual Report on Form 10-K of White River Corporation, and any
and all amendments thereto; such Form 10-K and each such amendment to be in such
form and to contain such terms and provisions as said attorney shall deem
necessary or desirable; giving and granting unto said attorney, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney, able to be done in and about the
premises as fully and to all intents and purposes as I might or could do if
personally present, hereby ratifying and confirming all that said attorney shall
lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, I have duly executed these presents this 24th day of
March, 1997.



                                            /s/ Gordon S. Macklin
                                            ---------------------
                                             Gordon S. Macklin