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): September 5, 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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Item 1.01         Entry into a Material Definitive Agreement.

On  January 4,  2005,  KeySpan  Corporation  (the  "Company")  filed an 8-K (the
"January 1, 2005 8-K") disclosing that,  effective  January 1, 2005, the Company
entered  into an  employment  agreement  with  Anthony  Sartor  relating  to his
services as Senior Vice President of the Company as well as President of KeySpan
Services,  Inc.,  a  wholly-owned,  indirect  subsidiary  of  the  Company  (the
"Employment  Agreement").  In addition,  the Company  disclosed that,  effective
January 1, 2005, the Company  entered into a supplemental  retirement  agreement
with  Mr.  Sartor  (the  "Supplemental  Agreement").  The  January  1,  2005 8-K
disclosed among other things the material terms of the Employment  Agreement and
the  Supplemental  Agreement and included  both  agreements as exhibits 10.1 and
10.2, respectively.

Effective  September  5, 2006,  the Company has entered into an amendment to the
Employment Agreement with Mr. Sartor (the "Employment Agreement Amendment"). The
Employment   Agreement   Amendment  revises  certain  terms  of  the  Employment
Agreement,  including,  but not limited to, extending the term of the Employment
Agreement  from  April 1, 2008 to April 1, 2009.  In  addition,  the  Employment
Agreement Amendment revises certain terms of the Supplemental Agreement.

A copy of the Employment  Agreement  Amendment is attached  hereto as Exhibit 10
and is incorporated herein by reference.





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Item 9.01        Financial Statements and Exhibits.

(c)              Exhibits.

Exhibit No.         Exhibit Description
- -----------         -------------------

  10.               Copy of the  Amendment  to the  Employment  Agreement  dated
                    January 1, 2005  between  KeySpan  Corporation  and  Anthony
                    Sartor








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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: September 8, 2006                  By:  /s/John J. Bishar Jr.
                                               ---------------------
                                               Name:  John J. Bishar Jr.
                                               Title: Executive Vice President,
                                                      General Counsel and
                                                      Chief Governance Officer





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                               INDEX TO EXHIBITS


Exhibit No.             Exhibit Description
- -----------             -------------------


  10.               Copy of the  Amendment  to the  Employment  Agreement  dated
                    January 1, 2005  between  KeySpan  Corporation  and  Anthony
                    Sartor













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