UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549


                                    FORM 8-K


                                 CCURRENT REPORT
                                    Pursuant
                          to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934



        Date of report (Date of earliest event reported): August 3, 2007


                               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  forecasted  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 plc 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 General Accepted Accounting Principles 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 the 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 and state
regulatory  policies  affecting  our ability to retain and operate such business
ventures  profitably;  a change in the fair market 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 unforced capacity financial swap pricing  structure;  receipt of approval of
certain  agreements  entered into with LIPA;  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 2.02.      Results of Operations and Financial Condition.
                ----------------------------------------------

     On August 3,  2007,  KeySpan  Corporation  ("the  Company")  issued a press
release  concerning,  among other  things,  its  consolidated  earnings  for the
quarter ended June 30, 2007. The Company's  press release is attached  hereto as
Exhibit 99.1 and incorporated herein by reference.





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

                Exhibits.

                99.1     Press Release dated August 3, 2007













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                                   SIGNATURES


     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: August 3, 2007                        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
- -----------           -------                                         ----

   99.1               Press Release dated August 3, 2007                7



















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