Exhibit 24.1


                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Lilyan H. Affinito
                                                     ----------------------
                                                     Lilyan H. Affinito






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Robert B. Catell
                                                     --------------------
                                                     Robert B. Catell






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 25, 2002

                                                     /s/ Andrea S. Christensen
                                                     --------------------------
                                                     Andrea S. Christensen






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Howard R. Curd
                                                     --------------------
                                                     Howard R. Curd






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Donald H. Elliott
                                                     ---------------------
                                                     Donald H. Elliott






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Alan H. Fishman
                                                     -------------------
                                                     Alan H. Fishman






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Vicki L. Fuller
                                                     -------------------
                                                     Vicki L. Fuller






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 25, 2002

                                                     /s/ J. Atwood Ives
                                                     ------------------
                                                     J. Atwood Ives






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ James R. Jones
                                                     ------------------
                                                     James R. Jones






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ James L. Larocca
                                                     --------------------
                                                     James L. Larocca






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Craig G. Matthews
                                                     ---------------------
                                                     Craig G. Matthews






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Stephen W. McKessy
                                                     ----------------------
                                                     Stephen W. McKessy






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ Edward D. Miller
                                                     --------------------
                                                     Edward D. Miller






                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that each director of KeySpan
Corporation (the "Corporation") whose signature appears below constitutes and
appoints Gerald Luterman, Michael J. Taunton and Ronald S. Jendras, and each of
them, lawful attorney-in-fact and agent, with full power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign the
Corporation's Registration Statement on Form S-3 relating to the issuance of up
to $1,700,000,000 (or the equivalent thereof in one or more foreign currencies
or one or more currency units) of securities and to sign any and all amendments
(including post-effective amendments) and supplements thereto, and to file the
same, with all exhibits thereto, and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent 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 to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Dated:            January 24, 2002

                                                     /s/ James Q. Riordan
                                                     --------------------
                                                     James Q. Riordan