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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                           /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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                           /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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                           /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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                              /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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                             /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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                               /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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                                /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, Joseph F. Bodanza and Michael J. Taunton, 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 registering additional
securities pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, which Registration Statement relates to the Registration Statement on
Form S-3 of the Corporation (File No. 333-82230) filed on February 6, 2002,
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:            April 1, 2003

                                                  /s/ Edward Travaglianti
                                                  -----------------------------
                                                  Edward Travaglianti