UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549


                                    FORM 8-K


                             Current Report Pursuant
                          to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934



       Date of report (Date of earliest event reported): November 29, 2006


                               KEYSPAN CORPORATION
             (Exact Name of Registrant as Specified in Its Charter)


                                    New York
                 (State or Other Jurisdiction of Incorporation)



       1-14161                                          11-3431358
(Commission File Number)                       (IRS Employer Identification No.)

              175 East Old Country Road, Hicksville, New York 11801
                 One MetroTech Center, Brooklyn, New York 11201
               (Address of Principal Executive Offices) (Zip Code)

                           (516) 755-6650 (Hicksville)
                            (718) 403-1000 (Brooklyn)
              (Registrant's Telephone Number, Including Area Code)



                                      N/A
          (Former Name or Former Address, if Changed Since Last Report)






Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

[ ]  Written  communications  pursuant to Rule 425 under the  Securities Act (17
     CFR 230.425)

[ ]  Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[ ]  Pre-commencement   communications  pursuant  to  Rule  14d-2(b)  under  the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement   communications  pursuant  to  Rule  13e-4(c)  under  the
     Exchange Act (17 CFR 240.13.e-4(c))








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Cautionary Language Concerning Forward-Looking Statements
- ---------------------------------------------------------

     Certain statements contained herein are "forward-looking statements" within
the meaning of Section 21E of the  Securities  Exchange Act of 1934, as amended,
which reflect  numerous  assumptions and estimates and involve a number of risks
and  uncertainties.  For these  statements,  we claim the protection of the safe
harbor  for  forward-looking  statements  provided  by  the  Private  Securities
Litigation Reform Act of 1995.

     There are  possible  developments  that could  cause our actual  results to
differ  materially  from  those  forecast  or  implied  in  the  forward-looking
statements.   You  are   cautioned   not  to  place  undue   reliance  on  these
forward-looking  statements,  which  are  current  only  as of the  date of this
filing.  We  disclaim  any  intention  or  obligation  to update  or revise  any
forward-looking  statements,  whether  as a result  of new  information,  future
events or otherwise.

     Among the factors that could cause actual results to differ materially are:
the occurrence of any event,  change or other circumstances that could give rise
to the termination of the merger  agreement with National Grid or the failure of
the merger to close for any reason; volatility of energy prices used to generate
electricity;  fluctuations  in weather and in gas and electric  prices;  general
economic  conditions,  especially in the Northeast United States; our ability to
successfully manage our cost structure and operate  efficiently;  our ability to
successfully contract for natural gas supplies required to meet the needs of our
customers;  implementation of new accounting  standards or changes in accounting
standards  or GAAP  which  may  require  adjustments  to  financial  statements;
inflationary  trends and interest rates;  the ability of KeySpan to identify and
make complementary  acquisitions,  as well as the successful integration of such
acquisitions;   available  sources  and  cost  of  fuel;   creditworthiness   of
counterparties to derivative instruments and commodity contracts; the resolution
of certain  disputes with Long Island Power Authority  ("LIPA")  concerning each
party's  rights and  obligations  under  various  agreements;  retention  of key
personnel;  federal and state  regulatory  initiatives  that  threaten  cost and
investment recovery,  and place limits on the type and manner in which we invest
in new businesses and conduct operations; the impact of federal, state and local
utility  regulatory  policies,  legislation  and  orders  on our  regulated  and
unregulated  businesses;  potential  write-down of our investment in natural gas
properties  when  natural  gas prices are  depressed  or if we have  significant
downward revisions in our estimated proved gas reserves;  competition facing our
unregulated  Energy  Services  businesses;   the  degree  to  which  we  develop
unregulated  business ventures,  as well as federal,  state and local regulatory
policies  affecting  our ability to retain and operate  such  business  ventures
profitably;  a change in the fair value of our  investments  that could  cause a
significant  change in the carrying  value of such  investments  or the carrying
value of related  goodwill;  timely  receipts of  payments  from our two largest
customers LIPA and the New York Independent  System Operator changes in the UCAP
pricing structure; timing of the approval of the 2006 LIPA Agreements and; other
risks detailed from time to time in other reports and other  documents  filed by
KeySpan with the Securities and Exchange Commission.


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Item 1.01      Entry into a Material Definitive Agreement

               See Item 2.03 which is incorporated by reference into this
               Item 1.01.

Item 2.03      Creation of a Direct Financial Obligation or an Off-Sheet Balance
               Arrangement of a Registrant

On November  29, 2006,  The  Brooklyn  Union Gas Company  d/b/a  KeySpan  Energy
Delivery  New York  ("KEDNY")  and KeySpan Gas East  Corporation  d/b/a  KeySpan
Energy Delivery Long Island ("KEDLI"), both wholly-owned subsidiaries of KeySpan
Corporation,  each entered into a note purchase agreement with certain investors
(each a "Note  Purchase  Agreement"),  whereby  each of KEDNY and  KEDLI  issued
Senior  Unsecured  Notes  ("Notes")  in the  amounts  of $400  million  and $100
million,  respectively.  Net proceeds from the sale of the Notes will be used to
refinance existing indebtedness and/or for general corporate purposes.

The Notes were  issued  pursuant  to a private  placement  and were  exempt from
registration under the Securities Act of 1933.

The Notes bear interest of 5.60% and mature on November 29, 2016.  Each of KEDNY
and KEDLI may, at its option,  prepay at any time all, or any part of, the Notes
in an amount  not less than five  percent  (5.00%)  of the  aggregate  principal
amount of the Notes  then  outstanding,  at 100% of the  principal  amount to be
prepaid plus a make-whole amount determined for the prepayment date with respect
to the prepayment  amount. In the event of a default by KEDNY or KEDLI under the
Note  Purchase  Agreement,  the Notes may become due and  payable for the unpaid
principal amount,  accrued interest and a make-whole amount determined as of the
time of the default.

This  description of the Note Purchase  Agreements and the Notes are subject to,
and  qualified  in their  entirety  by,  reference  to the KEDNY  Note  Purchase
Agreement and the KEDLI Note  Purchase  Agreement,  attached  hereto as Exhibits
10.1 and 10.2, respectively,  and the KEDNY Form of Note and KEDLI Form of Note,
attached hereto as Exhibits 10.3 and 10.4, respectively.

Item 9.01.     Financial Statements and Exhibits.
               ----------------------------------

        Exhibits.

        10.1        Note  Purchase  Agreement,  dated as of November  29,  2006,
                    between KEDNY and certain investors for the issuance of $400
                    million of Senior Unsecured Notes, due November 29, 2016,

        10.2        Note  Purchase  Agreement,  dated as of November  29,  2006,
                    between KEDLI and certain investors for the issuance of $100
                    million of Senior Unsecured Notes, due November 29, 2016

        10.3        KEDNY Form of 5.60% Senior  Unsecured  Note due November 29,
                    2016

        10.4        KEDLI Form of 5.60% Senior  Unsecured  Note due November 29,
                    2016


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                                    SIGNATURE


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.



                                              KEYSPAN CORPORATION

Dated: December 5, 2006                       By:  /s/ Gerald Luterman
                                                   -------------------
                                              Name:  Gerald Luterman
                                              Title: Executive Vice President
                                                     and Chief Financial Officer



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                                INDEX TO EXHIBITS
                                -----------------


Exhibit No.  Exhibit                                                             Page
- -----------  -------                                                             ----
                                                                           
10.1         Note Purchase Agreement, dated as of November 29, 2006,              7
             between KEDNY and certain investors for the issuance of
             $400 million of Senior Unsecured Notes, due November 29, 2016

10.2         Note Purchase Agreement, dated as of November 29, 2006,              50
             between KEDLI and certain investors for the issuance of
             $100 million of Senior Unsecured Notes, due November 29, 2016

10.3         KEDNY Form of 5.60% Senior Unsecured Note due November 29, 2016      93

10.4         KEDLI Form of 5.60% Senior Unsecured Note due November 29, 2016      95










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