Exhibit 24-a  Powers of Attorney

                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 26, 2006

                                                      /s/ Andrea S. Christensen






                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 26, 2006

                                                              /s/ Robert J. Fani





                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 26, 2006

                                                            /s/ Alan H. Fishman





                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 25, 2006

                                                              /s/ James R. Jones







                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 25, 2006

                                                           /s/ James L. Larocca






                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 26, 2006

                                                            /s/ Gloria C. Larson







                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 25, 2006

                                                          /s/ Stephen W. McKessy





                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 26, 2006

                                                           /s/ Edward D. Miller





                                POWER OF ATTORNEY


     KNOWN ALL MEN BY THESE PRESENTS,  that each director of KeySpan Corporation
(the  "Corporation")  whose  signature  appears below  constitutes  and appoints
Gerald Luterman and Theresa A. Balog, 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 and Form S-3 relating to shares of the  Corporation's  Common Stock
issuable  under  the  Investor  Program  and to  sign  any  and  all  amendments
(including post-effective amendments) and supplements thereto, and to file 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 thereof.

Dated: January 26, 2006

                                                             /s/ Vikki L. Pryor