As filed with the Securities and Exchange Commission on February 14, 2006

                                                     Registration No. 333-131429

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                Amendment No.1 to
                                    FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                               KEYSPAN CORPORATION
             (Exact name of registrant as specified in its charter)
                                 --------------
                New York                          11-3431358
      (State or other jurisdiction of           (I.R.S. Employer
       incorporation or organization)           Identification No.)
                                 --------------

                              JOHN J. BISHAR, ESQ.
          ONE METROTECH CENTER, BROOKLYN, NEW YORK 11201 (718) 403-3320
      175 EAST OLD COUNTRY ROAD, HICKSVILLE, NEW YORK 11801 (516) 545-6096
(Address and telephone number of principal executive offices and agent for
  service)

     Approximate date of commencement of proposed sale to the public:  From time
to time after the Registration Statement becomes effective.

If the only securities  being registered on this form are being offered pursuant
to dividend or interest reinvestment plans, please check the following box.[ ]

If any of the  securities  being  registered on this form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box.[X]

If this form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act, please check the following box and list
the  Securities  Act  registration  statement  number of the  earlier  effective
registration statement for the same offering.[ ]

If this form is a  post-effective  amendment filed pursuant to Rule 462(c) under
the  Securities  Act,  check  the  following  box and  list the  Securities  Act
registration  statement number of the earlier effective  registration  statement
for the same offering.[ ]

If this Form is a registration statement pursuant to General Instruction I.D. or
a post-effective  amendment thereto that shall become effective upon filing with
the  Commission  pursuant to Rule 462(e)  under the  Securities  Act,  check the
following box. [ ]

If this form is a post  effective  amendment to a registration  statement  filed
pursuant to General Instruction I.D. filed to register additional  securities or
additional  classes of securities  pursuant to Rule 413(b) under the  Securities
Act, check the following box.[ ]

                         CALCULATION OF REGISTRATION FEE


                                                      Proposed            Proposed
Title of Each                  Amount                 Maximum              Maximum                Amount of
Class of Securities            To Be               Offering Price         Aggregate              Registration
To Be Registered             Registered               Per Unit*         Offering Price*              Fee**
- ---------------              ----------               ---------         ---------------            -------
                                                                                      
Common Stock,
  par value                5,000,000 Shares            $36.217            $181,085,000            $19,376.10
$0.01 per share


* Estimated  solely for the purpose of calculating the registration fee pursuant
to Rule 457(o), on the basis of the estimated  maximum aggregate  offering price
of the registrant's Common Stock.

**$19,376.10  previously  paid by the Registrant in connection  with the initial
filing on January 31, 2006.



                                EXPLANATORY NOTE

     The purpose of this  Amendment  to the  Registration  Statement on Form S-3
initially filed on January 31, 2006 (the "Registration Statement"),  is to amend
and  restate  (1) the  section  of the  prospectus  entitled  "Incorporation  of
Documents  by  Reference"  and  (2)  Item  17 of  Part  II of  the  Registration
Statement.




                                TABLE OF CONTENTS





                                                                                                             
PART I - Information Required in Prospectus.......................................................................1
      KEYSPAN INVESTOR PROGRAM PROSPECTUS.........................................................................1

PART II - Information Not Required in Prospectus.................................................................26

         Other Expenses of Issuance and Distribution.............................................................26

         Indemnification of Directors and Officers...............................................................26

         List of Exhibits........................................................................................27

         Undertakings............................................................................................27

         Signatures..............................................................................................30

         Exhibit Index...........................................................................................32
















        KEYSPAN

  KeySpan Corporation




                                INVESTOR PROGRAM

                                  Common Stock,
                           $0.01 par value, per share

                                5,000,000 shares





                 ONE METROTECH CENTER, BROOKLYN, NEW YORK 11201
              175 EAST OLD COUNTRY ROAD, HICKSVILLE, NEW YORK 11801
                            (718) 403-1000 (BROOKLYN)
                      (516) 755-6650 (HICKSVILLE) (Address
              and telephone number of principal executive offices)



Our Common Stock is primarily  listed on the New York Stock  Exchange  under the
symbol KSE.  Investing in KeySpan's  Common Stock involves risks associated with
market  fluctuations.   Further  discussion  of  risks  associated  with  market
fluctuations can be found on page 3 of this prospectus.

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION  OR ANY  STATE  SECURITIES  COMMISSION  NOR  HAS  ANY  SUCH
COMMISSION  PASSED  UPON  THE  ACCURACY  OR  ADEQUACY  OF THIS  PROSPECTUS.  ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                This Prospectus is dated as of February 14, 2006.






                       KEYSPAN INVESTOR PROGRAM PROSPECTUS
                                TABLE OF CONTENTS

                                                                                           
PROSPECTUS SUMMARY..............................................................................3

RISK FACTORS....................................................................................3

PROFILE OF KEYSPAN CORPORATION..................................................................7

DESCRIPTION OF THE PROGRAM......................................................................8

SUMMARY.........................................................................................8

QUESTIONS AND ANSWERS..........................................................................10

         Purpose  .............................................................................10

         Advantages and Disadvantages..........................................................10

         Program Administration................................................................11

         Eligibility...........................................................................12

           Enrollment Procedures...............................................................12

         Common Stock Purchases................................................................15

              Stock Certificates and Safe Keeping..............................................17

         Sale of Shares........................................................................18

           Transfer of Shares..................................................................19

           Option Changes and Discontinuation of Reinvestment..................................19

         Reports to Participants...............................................................20

         Federal Income Taxes..................................................................21

         Other Information.....................................................................22

USE OF PROCEEDS................................................................................24

PLAN OF DISTRIBUTION...........................................................................24

LEGAL OPINIONS.................................................................................24

EXPERTS........................................................................................24

INCORPORATION OF DOCUMENTS BY REFERENCE........................................................24

DISCLOSURE OF COMMISSION POSITION ON INDEMNIFICATION FOR SECURITIES ACT
LIABILITIES....................................................................................25



                                       2




                               PROSPECTUS SUMMARY

     We are pleased to offer you the  opportunity  to participate in the KeySpan
Investor  Program  (the  "Program"),   a  direct  stock  purchase  and  dividend
reinvestment plan. The Program is designed to provide you with:

o    A  convenient  and  inexpensive  way to purchase and sell shares of KeySpan
     Common Stock ("Common Stock").

o    The chance to purchase  additional  shares of Common Stock, and to reinvest
     all or a portion of your cash dividends.

o    The opportunity to make additional cash purchases of Common Stock by check,
     money order or automatic deduction from your checking or savings account at
     a U.S. bank or financial institution.

o    An option to own and transfer  shares of Common Stock  without the need for
     holding stock certificates.

     As used in this  prospectus  and any  prospectus  supplement or term sheet,
"KeySpan" generally means KeySpan Corporation, together with its subsidiaries.

     You  should  rely only on the  information  incorporated  by  reference  or
provided in this  prospectus or any  supplement  or term sheet.  KeySpan has not
authorized anyone else to provide you with different information. KeySpan is not
making  an  offer  of these  securities  in any  state  where  the  offer is not
permitted.  You should not assume that the information in this prospectus or any
supplement  is accurate as of any date other than the date on the front of these
documents.


                                  RISK FACTORS

     Before  purchasing  shares of our Common Stock,  investors should carefully
consider  the  following  risk  factors  together  with  the  other  information
incorporated by reference or provided in this prospectus in order to evaluate an
investment in our Common Stock.

     We are a  holding  company,  and we and our  subsidiaries  are  subject  to
federal and/or state regulation which limits our financial activities, including
the ability of our subsidiaries to pay dividends and make distributions to us.

     We currently  are a holding  company  registered  under the Public  Utility
Holding Company Act of 1935, as amended  ("PUHCA  1935").  Congress has acted to
repeal the Public  Utility  Holding  Company Act of 1935 and replace it with the
Public  Utility  Holding  Company  Act of 2005  ("PUHCA  2005"),  which  becomes
effective  on  February  8,  2006  and  transfers   holding  company   oversight
responsibilities  from the  Securities  and Exchange  Commission  ("SEC") to the
Federal Energy  Regulatory  Commission  ("FERC").  Collectively,  PUHCA 1935 and
PUHCA 2005 are referred to herein as "PUHCA".  We have no business operations or
sources  of income of our own.  We conduct  all of our  operations  through  our
subsidiaries  and  depend on the  earnings  and cash flow of, and  dividends  or
distributions  from, our subsidiaries to provide the funds necessary to meet our
debt and  contractual  obligations  and to pay dividends on our Common Stock.  A
substantial  portion  of our  consolidated  assets,  earnings  and cash  flow is
derived from the operation of our regulated  utility  subsidiaries,  whose legal
authority  to pay  dividends  or make  other  distributions  to us is subject to
regulation by the utility regulatory commissions of New York,  Massachusetts and
New Hampshire.


                                       3



Our gas distribution and electric services  businesses may be adversely affected
by changes in federal and state regulation.

     The  regulatory  environment  applicable  to our gas  distribution  and our
electric services businesses has undergone  substantial changes in recent years,
on both the federal and state levels. These changes have significantly  affected
the nature of the gas and electric  utility and power  industries and the manner
in  which  their  participants  conduct  their  businesses.  Moreover,  existing
statutes  and  regulations  may  be  revised  or  reinterpreted,  new  laws  and
regulations  may be adopted or become  applicable to us or our  facilities,  and
future changes in laws and regulations may affect our gas  distribution  and our
electric services businesses in ways that we cannot predict.

     Proposals to re-regulate  the wholesale  power market have been made at the
federal level.  These  proposals,  and  legislative  and other  attention to the
electric power  industry could have a material  adverse effect on our strategies
and results of operations for our electric  services  business and our financial
condition.  In  particular,  we  sell  power  and  energy  from  our  Ravenswood
generating  facility into the New York  Independent  System  Operator  ("NYISO")
energy market at market based rates,  subject to mitigation measures approved by
FERC.  The pricing for both energy sales and services to the NYISO energy market
is still evolving and some of the FERC's price  mitigation  measures are subject
to rehearing and possible judicial review.

Our Risk Mitigation Techniques Such as Hedging and Purchase of Insurance May Not
Adequately Provide Protection

     To mitigate our financial exposure related to commodity price fluctuations,
KeySpan  routinely  enters into contracts to hedge a portion of our purchase and
sale commitments,  weather  fluctuations,  electricity sales, natural gas supply
and other  commodities.  However,  we do not always cover the entire exposure of
our assets or our  positions to market price  volatility  and the coverage  will
vary  over  time.  To the  extent  we have  unhedged  positions  or our  hedging
procedures do not work as planned,  fluctuating commodity prices could cause our
sales and net income to be volatile.

     In  addition,  our  business  is  subject  to many  hazards  from which our
insurance  may  not  adequately  provide  coverage.   An  unexpected  outage  of
Ravenswood, especially in the significant summer period, could materially impact
our financial  results.  Damage to pipelines,  equipment,  properties and people
caused by  natural  disasters,  accidents,  terrorism  or other  damage by third
parties could exceed our insurance  coverage.  Although we do have  insurance to
protect against many of these contingent  liabilities,  this insurance is capped
at certain levels, has self-insured retentions and does not provide coverage for
all liabilities.

SEC Rules for Exploration and Production Companies May Require Us to Recognize a
Non-Cash Impairment Charge at the End of Our Reporting Periods

     Our  investments in natural gas and oil consist of our ownership of KeySpan
Exploration  and Production and  Seneca-Upshur.  We use the full cost method for
KeySpan  Exploration  and  Production  and  Seneca-Upshur.  Under  the full cost
method, all costs of acquisition, exploration and development of natural gas and
oil reserves are capitalized  into a full cost pool as incurred,  and properties
in the pool are depleted and charged to operations using the  unit-of-production
method based on production  and proved  reserve  quantities.  To the extent that
these  capitalized  costs,  net of  accumulated  depletion,  less deferred taxes
exceed the present  value  (using a 10% discount  rate) of estimated  future net
cash flows from  proved  natural gas and oil  reserves  and the lower of cost or
fair value of unproved properties, those excess costs are charged to operations.
If a write-down  is required,  it would result in a charge to earnings but would
not have an impact on cash flows. Once incurred, an impairment of gas properties
is not reversible at a later date, even if gas prices increase.


                                       4



Our operating results may fluctuate on a seasonal and quarterly basis.

     Our gas  distribution  business  is a seasonal  business  and is subject to
weather  conditions.  We receive  most of our gas  distribution  revenues in the
first and fourth  quarters when demand for natural gas usually  increases due to
colder weather conditions. As a result, we are subject to seasonal variations in
working  capital  because we purchase  most of our  natural gas  supplies in the
second and third  quarters and must increase our  borrowings in these periods to
finance these  purchases.  Accordingly,  our results of operations in the future
will  fluctuate  substantially  on  a  seasonal  basis.  In  addition,  our  New
England-based  gas  distribution   subsidiaries  do  not  benefit  from  weather
normalization  tariffs, and results from our Ravenswood  generating facility are
directly  correlated to the weather as the demand and price for the  electricity
it generates  increases during the summer. As a result,  fluctuations in weather
between  years may have a significant  effect on our results of  operations  for
these subsidiaries.

A substantial  portion of our revenues are derived from our agreements  with the
Long Island Power  Authority  ("LIPA") and no assurances  can be made that these
arrangements will not be discontinued at some point in the future.  Furthermore,
KeySpan and LIPA recently  announced their  intentions to enter into certain new
agreements  that are not yet  effective  and  accordingly,  KeySpan is unable to
predict when or if these proposed agreements will become effective.

     We derive a  substantial  portion of our revenues in our electric  services
segment from a series of agreements with LIPA pursuant to which we manage LIPA's
transmission  and  distribution   system  and  supply  the  majority  of  LIPA's
customers' electricity needs.

     On December 14, 2005,  KeySpan and LIPA announced  their intention to enter
into  certain  agreements  (collectively  referred  to herein  as the  "Proposed
Agreements").  The  effectiveness  of  each  of  these  Proposed  Agreements  is
conditioned  upon, among other things,  successful  negotiation and execution of
definitive  documentation of the Proposed Agreements and receipt of all required
governmental  approvals.   Furthermore,   the  effectiveness  of  each  Proposed
Agreement  is  conditioned  upon all  Proposed  Agreements  becoming  effective.
Pursuant to the  Proposed  Agreements,  KeySpan and LIPA,  among other  changes,
contemplate a five year extension of the  Management  Services  Agreement  (MSA)
through December 31, 2013,  whereby KeySpan would continue to perform day-to-day
operation  and  maintenance  services  and  capital  improvements  on LIPA's T&D
System.  KeySpan  and LIPA  also  contemplate  entering  into a new  Option  and
Purchase and Sale  Agreement  that will grant LIPA the option  during the period
January 1, 2006 to December  31, 2006 to purchase  only  KeySpan's  Far Rockaway
and/or E.F. Barrett Generating  Stations (and certain related assets) at a price
equal to the net book value of each facility.

A decline  or an  otherwise  negative  change in the  ratings  or outlook on our
securities  could  have a  materially  adverse  impact on our  ability to secure
additional financing on favorable terms.

     The rating agencies that rate our securities regularly review our financial
condition  and  results of  operations.  We can provide no  assurances  that the
ratings or outlook on our securities will not be reduced or otherwise negatively
changed.  A negative  change in the ratings or outlook on our  securities  could
have a materially  adverse impact on our ability to secure additional  financing
on favorable terms.

Our costs of compliance with environmental laws are significant, and the cost of
compliance with future environmental laws could adversely affect us.


                                       5



     Our  operations  are  subject  to  extensive   federal,   state  and  local
environmental laws and regulations relating to air quality, water quality, waste
management,  natural resources and the health and safety of our employees. These
environmental laws and regulations  expose us to costs and liabilities  relating
to our operations and our current and formerly owned properties. Compliance with
these  legal  requirements  requires  us to commit  significant  capital  toward
environmental  monitoring,  installation  of  pollution  control  equipment  and
permits at our facilities.  Costs of compliance with environmental  regulations,
and in  particular  emission  regulations,  could have a material  impact on our
electric services business and our results of operations and financial position,
especially  if  emission  limits  are  tightened,   more  extensive   permitting
requirements are imposed,  additional  substances become regulated or the number
and type of electric generating plants we operate increase.

     In  addition,  we are  responsible  for the  clean-up of  contamination  at
certain manufactured gas plant ('MGP') sites and at other sites and are aware of
additional MGP sites where we may have  responsibility for clean up costs. While
our gas rate  plans  generally  allow  for the  full  recovery  of the  costs of
investigation and remediation of MGP sites,  these rate recovery  mechanisms may
change in the  future.  To the extent  rate  recovery  mechanisms  change in the
future,  or if  additional  environmental  matters  arise in the  future  at our
currently  or  historically  owned  facilities,  at sites we may  acquire in the
future  or  at  third  party  waste  disposal  sites,   costs   associated  with
investigating  and remediating  these sites could have a material adverse effect
on our results of operations and financial condition.

Provisions of our certificate of incorporation and bylaws and New York Corporate
Law and state regulatory requirements may discourage a takeover attempt.

     Provisions contained in our certificate of incorporation and bylaws and the
laws of New  York,  the  state  in which we are  organized,  could  make it more
difficult for a third party to acquire us in a  transaction  not approved by our
board of directors.  Provisions of our certificate of  incorporation  and bylaws
impose  various  procedural  and  other  requirements  that  could  make it more
difficult  for  shareholders  to  affect  certain   corporate   actions.   These
requirements may have the effect of delaying or deterring a change of control of
our company.  Furthermore,  the SEC and utility  regulatory  commissions  of New
York, Massachusetts and New Hampshire would need to approve any transaction that
involves a change of control of us. These  provisions could limit the price that
certain investors might be willing to pay in the future for shares of our Common
Stock.

Our  Businesses  are  Subject to  Competition  and General  Economic  Conditions
Impacting Demand for Services

     We recently  expanded the  Ravenswood  Facility,  our  merchant  generation
plant, in our Electric Services segment with the Ravenswood Expansion,  a 250 MW
combined cycle generating unit. However,  the Ravenswood Facility and Ravenswood
Expansion  continue to be subject to competition that could adversely impact the
market  price  for  the  electricity  they  produce.  If new  generation  and/or
transmission  facilities  are  constructed,   and/or  the  availability  of  our
Ravenswood Facility deteriorates,  then the capacity and energy sales quantities
could be adversely affected.  We cannot predict,  however,  when or if new power
plants or transmission  facilities will be built or the nature of the future New
York City energy requirements.

We may issue  additional  shares of Common  Stock  and  thereby  materially  and
adversely affect the price of our Common Stock.

     We are not restricted from issuing additional shares of Common Stock. If we
issue  additional  shares of Common  Stock,  that  issuance may  materially  and
adversely affect the price of our Common Stock.


                                       6



                         PROFILE OF KEYSPAN CORPORATION

     KeySpan  Corporation  (NYSE:KSE) is currently a registered  holding company
under PUHCA.  KeySpan operates six regulated  utilities that distribute  natural
gas to  approximately  2.6  million  customers  in New York City,  Long  Island,
Massachusetts   and  New  Hampshire,   making  KeySpan  the  fifth  largest  gas
distribution  company in the United States and the largest in the Northeast.  We
also own,  lease and operate  electric  generating  plants in Nassau and Suffolk
Counties  on Long  Island  and in  Queens  County  in New York  City and are the
largest  electric  generation  operator  in New York  State.  Under  contractual
arrangements, we provide power, electric transmission and distribution services,
billing and other  customer  services  for  approximately  1.1 million  electric
customers of the Long Island Power Authority ("LIPA"). KeySpan's other operating
subsidiaries   are  primarily   involved  in  gas  exploration  and  production;
underground  gas  storage;   liquefied  natural  gas  storage;  retail  electric
marketing; large energy-system ownership,  installation and management;  service
and maintenance of energy systems; and engineering and consulting  services.  We
also  invest  and  participate  in the  development  of natural  gas  pipelines,
electric generation and other energy-related projects.











                                       7




                           DESCRIPTION OF THE PROGRAM

                                     SUMMARY

     This summary highlights selected information from this prospectus,  but may
not contain all of the information that is important to you. To fully understand
the  Program  and for a more  complete  description  of the  legal  terms of the
Program,  you should read this entire  document  carefully  and the documents to
which we have referred you. To find out how to obtain copies of these documents,
see Question 32.

Program Administration

     We have appointed  Computershare  Trust Company,  N.A.,  ("Computershare"),
formerly  EquiServe Trust Company,  N.A., as our Transfer Agent and Registrar to
administer  the  Program.  All  purchases  of  Common  Stock  will  be  made  by
Computershare  at 100% of the  then-current  market  price of the Common  Stock,
calculated  as  described  in this  prospectus,  either in the open  market,  or
directly from KeySpan.

     Our Common Stock is primarily  listed on the New York Stock  Exchange under
the symbol KSE.  Investing in KeySpan's  Common Stock involves risks  associated
with market fluctuations.

     To the extent  required by law, in certain  jurisdictions,  shares  offered
through  the  Program  will be offered  through a  registered  broker/dealer  to
persons who are not currently KeySpan shareholders.

     Purpose of the Program

     The  purpose  of the  Program  is to provide  our  Registered  Shareholders
(shareholders  whose stock is  registered  in their  name,  not in the name of a
broker) and other investors with a simple, convenient and economical way to make
and increase investments in our Common Stock and to reinvest all or a portion of
any cash dividends paid in additional  shares of Common Stock.  The Program also
provides participants with an economical method to sell shares of Common Stock.

     How To Participate in the Program

         New Investors


o    If you are not  currently a KeySpan  shareholder,  you can purchase  Common
     Stock  for the  first  time  with a  minimum  investment  of $250,  with no
     transaction fees. New investors may make their initial investment in Common
     Stock by completing an Initial Investment Form and either mailing it with a
     check  or  money  order  for at  least  $250,  or,  alternatively,  you can
     authorize  Computershare  to automatically  deduct your initial  investment
     from a checking or savings account at a U.S. bank or financial institution.
     The automatic deduction feature also provides new investors with the option
     of having a minimum of $25  deducted  either  monthly or  semi-monthly,  in
     order  to  reach  the  minimum  investment  of  $250.  However,  it will be
     necessary to notify Computershare to stop making automatic deductions.


o    New investors can also enroll on the Internet at Computershare's website at
     www.computershare.com/equiserve   or  the  Investor  Relations  section  of
     KeySpan's website at www.keyspanenergy.com.


o    New  investors  can  reinvest  their  dividends  by checking  the  dividend
     reinvestment   option  on  the  Initial  Investment  Form,  or  by  calling
     Computershare at 1-800-482-3638.


                                       8



         Registered Shareholders


o    If you are a Registered  Shareholder,  you may make additional  investments
     (minimum of $25,  annual  maximum of $150,000) by check,  money order or by
     authorizing Computershare to automatically deduct your investment from your
     checking or savings account at a U.S. bank or financial institution.


o    Registered Shareholders wishing to change dividend reinvestment options may
     do so by completing and submitting an Enrollment Authorization Form. Please
     refer to Question 5 for information on contacting Computershare.


         Non-Registered Shareholders


o    KeySpan  shareholders  holding  their  stock  through a broker  must become
     Registered Shareholders to enroll in the Program.

For  further  instructions  on how to  participate  in the  Program,  please see
Question 7.


     Features of the Program


o    Automatically  reinvest  all or part of your  cash  dividends  to  purchase
     additional shares.

o    You do not need to reinvest your  dividends to  participate.  Dividends not
     reinvested  can be paid to you by check or electronic  deposit to your bank
     account.

o    You may sell  your  shares of Common  Stock by  instructing  Computershare,
     either by telephone,  in writing, or through the Internet.  Sale orders are
     processed daily.

o    You may transfer  shares or make gifts of shares of Common Stock easily and
     at no cost.

o    You may make all account  inquiries by telephone,  writing,  and/or via the
     Internet.

o    Cash investments are processed weekly, usually on Thursdays.

o    Your  whole and  fractional  shares of Common  Stock are  credited  to your
     Program account in safe and convenient  book-entry form.  However,  you may
     request stock certificates free of charge.

o    For  safekeeping  purposes,   stock  certificates  can  be  converted  into
     book-entry  shares,  which will be credited to your  Program  account at no
     cost to you.


Fees and Commissions


o    KeySpan pays all  processing  fees for initial  investments in the Program,
     for additional investments and dividend reinvestments processed as original
     issue  or  treasury  shares  and for the  annual  maintenance  cost of your
     Program  account.  However,  should the Company purchase shares on the open
     market, participants will pay a brokerage commission of $0.05 per share.


                                       9



o    You will be charged only the  transaction  and  brokerage  fees  (currently
     $5.00 per  transaction and $0.05 per share) on the sale of shares of Common
     Stock through the Program, and brokerage  commissions on all purchases made
     using open market shares (currently $0.05 per share).

o    Returned checks or failed automatic deduction transactions will result in a
     charge of $20 to the participant.

o    You will be charged  $5.00 per year (not to exceed  $25.00) for a duplicate
     statement older than two calendar years.


                              QUESTIONS AND ANSWERS

     The  following is a question and answer format  explanation  of the Program
which provides the terms and conditions of the Program.

     Purpose

1.   What is the purpose of the Program?

     The purpose of the Program is to provide Registered  Shareholders of Common
     Stock and  other  investors  a simple,  convenient  and  economical  way to
     accumulate  and increase  their  investment in Common Stock and to reinvest
     all or a portion of their cash  dividends  in  additional  shares of Common
     Stock. The Program also provides  participants with an economical method to
     sell shares of Common Stock.


     Advantages and Disadvantages

2.   What are the advantages of the Program?

     The  advantages of the Program are as follows:


o    Direct Purchase of Initial Shares:  Persons not presently  owning shares of
     Common Stock may enroll in the Program by making an initial  investment  of
     at least $250, but not more than $150,000.

o    Reinvestment of Dividends:  Participants may purchase  additional shares of
     Common Stock  automatically  by reinvesting  all or a portion of their cash
     dividends. Dividend payments not reinvested will be paid to participants by
     check or will be deposited electronically upon written request.

o    Direct  Purchase  of Common  Stock  through  Additional  Cash  Investments:
     Participants  may  purchase  additional  shares of  Common  Stock by making
     additional cash investments by check, money order or electronic transfer in
     amounts of at least $25 per investment, with a maximum allowable investment
     of $150,000 per year.

o    Certificate Safekeeping: The Program offers a "safekeeping" service free of
     charge,  whereby  Registered  Shareholders  may deposit  their Common Stock
     certificates with Computershare and have their certificated shares credited


                                       10



     to their Program  account.  This feature prevents stock  certificate  loss,
     theft or destruction. Since deposited shares become book-entry shares, they
     may be  transferred  or  sold  through  the  Program  in a  convenient  and
     economical manner.

o    Reduced  Fees:  Fees charged to  participants  are usually less than if the
     individual investor purchased or sold shares outside of the Program through
     a broker.

o    Certificates/Transfer  or Shares:  Participants may request the issuance of
     stock  certificates or transfer to another  participant all or a portion of
     their Program shares free of charge. Stock certificates will only be issued
     in whole share amounts.

o    Convenient,  Inexpensive  Sale of  Shares:  Participants  may sell  Program
     shares by providing  written  instructions to  Computershare,  by using the
     automated telephone sales feature or via the Internet. Participants will be
     charged  a  sales  fee  of  $5.00  for  each  transaction  and a  brokerage
     commission of $0.05 per share sold.

o    Simplified  Recordkeeping:  Participants  are  furnished an  acknowledgment
     after each purchase or sale,  quarterly  statements and cumulative year-end
     statements  of their  Program  accounts,  providing a simplified  method of
     recordkeeping.

3.   What are the Disadvantages of the Program?

     The  disadvantages of the Program are as follows:

     o    No Interest Paid on Funds Pending  Investment:  No interest is paid on
          dividends or optional cash investments  held by Computershare  pending
          investment or reinvestment.

     o    Purchase/Sale Price  Determination:  Participants have no control over
          the share  price or the  timing  of the sale or  purchase  of  Program
          shares.  Participants  cannot designate a specific price or a specific
          date  or  the  selection  of a  broker/dealer  through  or  from  whom
          purchases are made. In addition,  participants will not know the exact
          number of shares purchased until after the investment date.


     Program Administration

4.   Who administers the Program?

     Computershare  has been appointed as our transfer  agent, to administer the
     Program.  Computershare's  responsibilities  in  administering  the Program
     include:

o    Determining  the timing and the making of  purchases of Common Stock on the
     open market.

o    Crediting participant's accounts with shares of Common Stock acquired under
     the Program.

o    Maintaining Program account records.

o    Sending statements of Program account activity to participants.


5.   Who  should  I  contact  with  questions  regarding  the  Program  and  its
     administration? You may contact Computershare by writing to:


                                       11



                                  Computershare
                                 P.O. Box 43069
                            Providence, RI 02940-3069

     You may also contact  Computershare at one of the telephone  numbers listed
     below:


o    Shareholder  customer  service,  including  sale of shares:  1-800-482-3638
     (within the U.S.  and  Canada) and  1-201-324-0498  (outside  the U.S.  and
     Canada).

o    New investors  requesting  Program material:  1-800-948-1691  (available 24
     hours, 7 days a week) and TDD: 1-201-222-4955 (a telecommunications  device
     for the hearing impaired is available).

     You  may  also  contact  Computershare  via the  Internet.  Computershare's
     Internet address is www.computershare.com/equiserve.  Messages sent via the
     Internet will be responded to promptly. At Computershare's website, you can
     access your share balance,  sell shares,  request a stock certificate,  and
     obtain online forms and other  information  about your Program account.  To
     get access to your Program account,  you will require a password which will
     be sent to you by  mail,  or you  can  request  your  password  by  calling
     toll-free 1-877-THE-WEB7 (1-877-843-9327).


     Eligibility

6.   Am I eligible to participate in the Program?


     Any person or entity is eligible to participate in the Program,  whether or
     not you currently own our Common Stock.  If you are a resident of a foreign
     country, you should make sure that participation would not violate any laws
     in the country in which you reside.


     Enrollment Procedures

7.   How do I become a Program participant?


     New Investors.  If you do not currently own our Common Stock you may enroll
     in the Program by completing an Initial  Investment  Form.  You must return
     the completed form to Computershare  with an initial investment of at least
     $250, but not more than $150,000. The payment can be in the form of a check
     or money order,  made payable to  "Computershare  - KeySpan." PLEASE DO NOT
     SEND CASH.

     You may also authorize  automatic  deductions of $25 per transaction from a
     checking or savings account at a U.S. bank or financial  institution either
     monthly or semi-monthly,  in order to reach the minimum investment of $250.
     Automatic  deductions  will  continue  until such time as the new  investor
     notifies  Computershare in writing to stop making automatic deductions.  An
     Automatic  Deduction  Authorization Form is included on the reverse side of
     the Initial Investment Form.

     If you are a Registered Shareholder. If you own shares of Common Stock that
     are  registered in your name,  not the name of a broker,  you can enroll in


                                       12



     the Program by completing and returning an Enrollment Authorization Form to
     Computershare or by calling Computershare  directly at 1-800-482-3638.  You
     may  obtain  additional  Enrollment  Authorization  Forms at any time  upon
     request to Computershare.

     If you are a Non-Registered Shareholder. If you are the beneficial owner of
     Common  Stock  through  a  bank,  broker,  or  trustee,  you can  become  a
     Registered  Shareholder by  instructing  your bank,  broker,  or trustee to
     transfer some or all of your shares of Common Stock into your name. You can
     choose whether to receive a physical stock  certificate  for your shares of
     Common Stock,  have them  registered in the Direct  Registration  System in
     your name or deposit them in a book-entry  Program  account  maintained  by
     Computershare.

There are several  options in which you may elect to hold your shares of KeySpan
Common Stock:

     Stock  Certificate.  Once you receive your stock  certificate in your name,
     you can enroll in the Program and you may begin to use all of the  services
     of the Program, such as the dividend reinvestment and economical selling of
     shares features.

     Direct  Registration  System  Book-Entry  Shares.  This  is  an  electronic
     transfer of your shares from your  broker's name into your name through the
     Direct  Registration  System.  Simply  instruct  your broker to conduct the
     transaction.  This will establish a book-entry account at Computershare and
     you can then commence using any or all of the Program services.

     Deposit Shares with Computershare in Book-Entry  Account.  You can also opt
     to  have  your  shares  held  in  a  book-entry  account   administered  by
     Computershare. This allows you to have the added safe-keeping feature which
     protects  you  against  the  loss,  theft  or  destruction  of  your  stock
     certificate.

     You may also arrange to have your bank,  broker, or nominee  participate in
     the Program on your  behalf.  In this case,  your  participation  may be on
     terms and  conditions  which differ from the terms and conditions set forth
     in this Program,  you will be limited to the dividend  reinvestment feature
     use of the Program only.  The terms and conditions set forth in the Program
     will also be subject to the terms and conditions of your bank,  broker,  or
     nominee.  Computershare will not have a record of your transactions or your
     account since they will remain under the name of your bank or broker.

8.   What are my dividend reinvestment options available under the Program?

     The following options are available to you under the Program.  However, you
     must elect one of the following  options on the Initial  Investment Form or
     the  Enrollment  Authorization  Form in order to have any  portion  of your
     dividends  paid  to  you,   otherwise  they  will  automatically  be  fully
     reinvested to purchase additional shares of Common Stock.

     Full Dividend Reinvestment.  You can opt to have all of your cash dividends
     on all  certificated  and  Program  shares  of Common  Stock  automatically
     reinvested to purchase  additional  shares of Common  Stock.  If you do not
     make  an  election  on  the  Initial  Enrollment  Form  or  the  Enrollment
     Authorization  Form  you  will  automatically  have  your  dividends  fully
     reinvested.

     Partial  Dividend  Reinvestment.  You  may  choose  to  receive  your  cash
     dividends on a specified number of shares of Common Stock and automatically


                                       13



     have the cash  dividends  on the  remainder  of your shares of Common Stock
     reinvested to purchase  additional  shares of Common Stock. If you elect to
     have  partial  dividends  reinvestment,  you must  designate  the number of
     Program shares and/or  certificated  shares for which you choose to receive
     your cash  dividends in a whole number.  Cash  dividends are sent to you by
     check or, upon request,  are deposited  electronically  into your U.S. bank
     account.

     Cash Payment Only (No Dividend Reinvestment). You may choose to receive all
     of your  dividends as a cash  payment.  Cash  dividends  are sent to you by
     check or, upon request,  are deposited  electronically  into your U.S. bank
     account.

     For more information on the electronic  deposit of dividends,  please refer
     to Question 10, or contact Computershare.

9.   How do I make additional cash investments in Common Stock?

     You may make  additional  cash  investments by choosing among the following
     two options:

     Check Investment.  You may make additional cash investments in Common Stock
     by sending to  Computershare  a check,  money order,  or bank draft for the
     purchase of additional  shares of Common Stock. The check,  money order, or
     bank  draft  must be made  payable to  "Computershare  -  KeySpan"  in U.S.
     dollars and drawn on a U.S. bank. If you are not in the U.S.,  contact your
     bank to verify that they can provide you with a check that clears through a
     U.S. bank and can print the dollar amount in U.S. funds.  Due to the longer
     clearance  period, we are unable to accept checks clearing through non-U.S.
     funds.  Computershare will not accept third party checks. All checks, money
     orders,  and bank  drafts  should be sent to  Computershare  at the address
     listed on the tear-off form attached to each Program account  statement you
     receive, or with your Initial Investment Form.

     Automatic  Investment  from a Bank Account.  As an  alternative  to sending
     checks, money orders, and bank drafts for additional cash investments,  you
     may elect to have  funds  automatically  withdrawn  from your  checking  or
     savings account at a U.S. bank or financial institution.  You may elect the
     automatic   deduction   option  by  completing  and  signing  an  Automatic
     Deductions  Authorization  Form and returning  this form to  Computershare,
     together with a voided blank check or savings  account deposit slip for the
     bank account from which the funds are to be withdrawn. Additional Automatic
     Deductions  Authorization Forms are available through  Computershare.  Your
     Automatic  Deductions  Authorization Form will be processed and will become
     effective as promptly as practicable. However, you should allow four to six
     weeks  for the  first  investment  to be  initiated  using  this  automatic
     deduction feature. Once automatic deductions begin, funds will be withdrawn
     from your bank account on either the first or fifteenth  day of each month,
     or both (at your  option),  or on the next  business day if either of those
     days  is not a  business  day.  You may  change  or  discontinue  automatic
     deductions by completing  and submitting to  Computershare  a new Automatic
     Deductions Authorization Form.

     Brokers  or  bank  nominees   participating  on  behalf  of  Non-Registered
     Shareholders  or beneficial  owners may only use the dividend  reinvestment
     feature  of the  Program  and  cannot use the  additional  cash  investment
     feature.  If a  Non-Registered  Shareholder  wishes to  participate  in the
     additional  cash  investment  feature of the Program,  he or she must first
     become a Registered  Shareholder  or make an initial  investment  to enroll
     directly in the Program.


                                       14



10.  Can my cash dividends be deposited directly to my bank account?

     Yes, you may elect to have any cash dividends which are not reinvested paid
     by electronic  funds  transfer to your U.S. bank account.  To do this,  you
     must first  complete  and  return a Direct  Deposit  Authorization  Form to
     Computershare  along with a copy of a voided blank check or savings account
     deposit  slip.  This form is not included  with your Program  materials and
     must   be   specifically    requested   from   Computershare   by   calling
     1-800-870-2340.

11.  What are the minimum and maximum amounts for additional cash investments?

     In  addition  to  increasing  your  holdings  of Common  Stock  through the
     reinvestment  of dividends,  you may make  additional  cash  investments in
     Common Stock at any time. Your additional cash investments by check,  money
     order,  or  automatic  deductions  must  be at  least  $25  with a  maximum
     allowable  investment  of  $150,000  per  calendar  year.  If you are not a
     Registered  Shareholder and are a first time investor in the Program,  your
     initial  investment  must be for at least $250 and cannot exceed  $150,000.
     See Question 7 regarding new investors.


     Common Stock Purchases

12.  What are the sources of Common Stock purchased under the Program?

     Shares of Common  Stock will be  purchased  either on the open  market,  or
     directly from KeySpan,  from shares held in our treasury or as newly issued
     shares, or a combination of the foregoing.  You cannot choose the source of
     your shares purchased since this is entirely at our discretion.

     Shares purchased on the open market may be made on any stock exchange where
     our  Common  Stock is traded or by  negotiated  transactions  on terms that
     Computershare may reasonably determine.  Should the Company purchase shares
     on the Open Market,  participants will pay a brokerage  commission of $0.05
     per share.  Neither KeySpan nor any participant  will have any authority or
     power to direct the date,  time,  or price at which  shares of Common Stock
     may be purchased,  or the  selection of a broker or dealer  through or from
     whom purchases are made.

13.  When will shares be purchased under the Program?


o    General.  Direct purchases from KeySpan's authorized but unissued shares of
     Common  Stock  will  normally  be made on a weekly  basis  on the  relevant
     "investment  date,"  (usually  Thursdays)  or the next  trading  day if the
     investment  date is not a trading  day.  Purchases  on the open market will
     begin on the  investment  date and will be  completed no later than 30 days
     from such date,  except  where  completion  at a later date is necessary or
     advisable under any applicable federal securities law.


o    Cash  Investments.  Computershare  will  normally  invest any  initial  and
     additional  cash  investments  for the purchase of Common Stock on a weekly
     basis, usually on Thursdays,  after receipt of the check, money order, bank
     draft or  automatic  deduction.  Computershare  will  determine  the actual
     investment  date for initial and  additional  cash  investments  and should
     receive  payment  no  later  than 2  business  days  prior  to each  week's
     investment date.  However, it should be noted that there is no guarantee of


                                       15



     the  date on  which  investments  will be made or if your  payment  will be
     received on time for that week's investment.


o    Dividend Reinvestments. The investment date for dividend reinvestments will
     be the  dividend  payment  date or the next  business  day if the  dividend
     payment  date  is  not a  business  day.  If  Computershare  receives  your
     Enrollment  Authorization  Form requesting  reinvestment of dividends on or
     before the record date established for a particular dividend,  reinvestment
     will commence with that dividend. If Computershare receives your Enrollment
     Authorization  Form  requesting  reinvestment of dividends after the record
     date established for a particular  dividend,  you will be paid the dividend
     in cash and your  reinvestment of dividends will begin on the next dividend
     payment date.

     The  anticipated  payment  dates for Common  Stock are usually on the first
     business day of February,  May, August, and November.  The record dates for
     Common Stock are usually the week of the 10th of the previous  month of the
     payment  date.  It is  anticipated  that record dates and payment dates for
     dividends,  that we may declare in the future, will be at approximately the
     same times of the year.

14.  How is the purchase price of the Common Stock determined?

     The purchase  price of Common Stock  purchased  directly from  KeySpan,  as
     treasury  shares or original issue shares,  will be the average of the high
     and low  prices  of the  Common  Stock as  reported  in the New York  Stock
     Exchange composite transactions for that investment date.

     You cannot  request a  specific  purchase  price,  date,  quantity,  and/or
     purchase by a specific broker.

     The  purchase  price of Common  Stock  purchased  on the open market is the
     weighted  average of the  actual  purchase  price of all  shares  purchased
     during the applicable  investment  period. The price is adjusted to include
     brokerage  commissions  of $0.05  per  share.  Open  market  purchases  are
     expected to be made through Computershare.

     A Program  participant will have the applicable  commissions  deducted from
     the funds used to purchase shares acquired under the Program,  see Question
     25.

15.  How many shares of Common Stock will be purchased for me?

     The number of shares  purchased for you will be equal to the amount of your
     additional cash investments, plus any dividends available for reinvestment,
     or the initial investment  received by Computershare  during the investment
     period,  less any  applicable  fees,  divided by the purchase  price of the
     shares.  Your Program account will be credited with the number of shares of
     Common Stock, including fractional shares computed to three decimal places.

16.  Will I be paid interest on any amounts pending the actual investment date?

     No.  Interest  will  not be  paid on  amounts  sent  to  Computershare  for
     investment pending the actual investment date.


                                       16



     Stock Certificates and Safe Keeping

17.  Will I be issued stock  certificates  for shares of Common Stock  purchased
     through the Program?

     No. Shares of Common Stock purchased through the Program will not be issued
     to you in stock  certificate  form,  but will be credited  to your  Program
     account - as book  entry  shares - by  Computershare  on your  behalf.  The
     number of shares of Common Stock  credited to your Program  account will be
     shown on your Program account statement.

18.  How may I receive a stock certificate?

     You may obtain a stock  certificate at no cost for some or all of the whole
     shares  credited to your Program  account at any time by simply  requesting
     Computershare  to withdraw  shares from your  Program  account and to issue
     them in stock certificate form. You may make such a request by:


o    Calling Computershare at 1-800-482-3638;

o    Accessing  your Program  account  through the  Internet at  Computershare's
     website www.computershare.com/equiserve;

o    Using the tear-off form attached to the Program account statement; or

o    Sending  written  notice  specifying  the  number  of  whole  shares  to be
     withdrawn.

     Stock certificates will be issued to you and registered in your name. Stock
     certificates  are normally issued to participants  within two business days
     after  receipt of a  request.  No stock  certificates  will be issued for a
     fractional  share of Common Stock.  If you request a stock  certificate for
     all shares credited to your Program  account,  a stock  certificate will be
     issued  for the  whole  shares  and a cash  payment  will  be made  for any
     remaining  fractional  shares.  That cash  payment  will be based  upon the
     then-current  market price of the Common  Stock,  less any service fee, any
     applicable brokerage commission, and any other costs of sale.

     Withdrawing  shares from your Program account into stock  certificate  form
     does not affect your  dividend  reinvestment  option.  For example,  if you
     authorized  the full dividend  reinvestment  option,  cash  dividends  with
     respect to shares withdrawn from your Program account in stock  certificate
     form will continue to be reinvested.

19.  May I add my shares of Common  Stock held in stock  certificate  form to my
     Program account with Computershare for safekeeping purposes?

     Yes, you may deposit any Common Stock  certificate  in your  possession and
     registered  in your  name with  Computershare  for  credit to your  Program
     account as book-entry  shares at any time, at no transaction  cost. We will
     pay all  fees  for  this  service.  This  safekeeping  feature  offers  two
     advantages:


o    The risk associated with loss, theft, or destruction of stock  certificates
     is  eliminated;   otherwise,  in  the  case  of  a  lost  or  stolen  stock
     certificate, no sale or transfer may occur until a replacement is obtained,
     which  can be a costly  and  time-consuming  process;  and


                                       17



o    Since shares  deposited into your Program  account with  Computershare  are
     treated in the same manner as shares  purchased  through the Program,  they
     may be  transferred  or  sold  through  the  Program  in a  convenient  and
     efficient manner.

     To combine shares held in stock  certificate  form with shares  credited to
     your  Program   account,   you  must  send  your  request  and  your  stock
     certificates  to  Computershare.  The  stock  certificates  should  not  be
     endorsed.  Computershare will promptly send you a statement confirming each
     stock certificate deposited.

     To insure  against  loss  resulting  from  mailing  stock  certificates  to
     Computershare, the Program provides for mail insurance, free of charge, for
     stock  certificates  valued up to $25,000  current  market  value  (maximum
     coverage) when mailed first class,  using a brown,  pre-addressed  envelope
     provided   by   Computershare.   Envelopes   may  be  obtained  by  calling
     Computershare  at  1-800-482-3638.  For  information  about  mailing  stock
     certificates  which have a current  market value in excess of $25,000,  you
     should contact Computershare.  To be eligible for stock certificate mailing
     insurance,  you must  notify  Computershare  of any lost stock  certificate
     claim  within  30  calendar  days of the date the stock  certificates  were
     mailed.

     Mail insurance  covers the replacement of shares of Common Stock, but in no
     way protects you against any loss resulting from  fluctuations in the value
     of the shares from the time you mail the stock  certificates until the time
     replacement can be made. If you do not use a brown,  pre-addressed envelope
     provided by Computershare,  you should send your stock  certificates to the
     address listed in Question 5 by registered mail, return receipt  requested,
     and insure for  possible  mail loss for 3%  (minimum  of $20) of the market
     value.  This  represents  the  approximate  cost to you of replacing  stock
     certificates if they are lost or stolen.

     Sale of Shares

20.  How can I sell Program shares?

     To sell any shares  that you hold in stock  certificate  form  through  the
     Program,  the shares must first be  converted  into  book-entry  shares and
     credited to your Program  account with  Computershare.  You can sell any of
     the shares credited to your Program account with  Computershare  by calling
     Computershare  at  1-800-482-3638,  accessing your Program  account via the
     Internet at  www.computershare.com/equiserve,  by writing to Computershare,
     or by  completing  and  submitting  the  tear-off  portion of your  Program
     account statement.

21.  How is the sale price of Program shares determined?

     Computershare  aggregates  all  requests  to sell shares and then sells the
     total share amount on the open market. Upon receipt of your request to sell
     some or all of your shares, Computershare will make every reasonable effort
     to process all sales orders on the day the orders are  received.  To do so,
     you must ensure that  instructions  are received before 1:00 p.m.  (Eastern
     Time) on a business day during which  Computershare  and the New York Stock
     Exchange are open.

     Sales will be made at the then-current market price of the Common Stock and
     Computershare will promptly mail you a check. The check will be for the net
     cash  proceeds  of the sale,  minus a service  fee of $5.00 plus  brokerage
     commissions of $0.05 per share.  Computershare  has full  discretion in all
     matters related to the sale, including the time of sale and sales price and


                                       18



     the selection of a broker. You cannot specify a price or a time at which to
     sell your book-entry shares.

     You should be aware that the Common Stock price may rise or fall during the
     period  between a request for sale,  its receipt by  Computershare  and the
     ultimate sale on the open market.  Instructions  sent to  Computershare  to
     sell shares are irrevocable and may not be rescinded.

     Transfer of Shares

22.  Can I assign or  transfer  all or a part of my  Program  shares to  another
     person?

     Yes. You may change ownership of all or part of your Program shares through
     a gift,  sale or otherwise at any time.  You may contact  Computershare  at
     1-800-482-3638 for complete transfer  instructions and you will be asked to
     send  Computershare  written  transfer  instructions to enact the transfer.
     Requests  for  transfer  are  subject to the same  requirements  as for the
     transfer of stock  certificates,  including the  requirement of a Medallion
     Signature Guarantee.

23.  If Program shares are  transferred to another  person,  will  Computershare
     issue a stock certificate to the transferee?

     No.  Transfers will be credited to an account in book entry form. If you so
     request,  a stock  certificate can be issued to the transferee.  You should
     contact Computershare for full details on how to make the transfer.

     For book entry  transfers that involve the  establishment  of a new Program
     account,  the  completed  Initial  Investment  Form  must  be  returned  to
     Computershare,  along  with  written  instructions  signed  by the  current
     participant,  indicating  the  number of shares  to be  transferred  to the
     transferee.  The current  participant's  signature  must be guaranteed by a
     bank,  broker or financial  institution  that is a member of the  Medallion
     Signature  Guarantee  program.  The new Program  account will be set up for
     full dividend  reinvestment unless otherwise  instructed by the previous or
     new shareholder.


     Option Changes and Discontinuation of Reinvestment

24.  How can I change my dividend reinvestment option or discontinue reinvesting
     my dividends?

     You may change  dividend  reinvestment  options  by  calling  Computershare
     directly at 1-800-482-3638,  instructing  Computershare in writing, through
     the  Internet  or by  submitting  to  Computershare  a new  election  on an
     Enrollment Authorization Form. To be effective for a specific dividend, any
     change must be received  by  Computershare  before the record date for that
     dividend - see Question 13 for information  regarding record dates. You may
     discontinue  reinvestment  of cash  dividends  at any  time by  calling  or
     writing  Computershare or through the Internet.  If Computershare  receives
     your request to discontinue  dividend  reinvestment  on or after the record
     date for a dividend,  Computershare  may either pay the dividend in cash or
     reinvest it under the Program on the next  investment  date on your behalf.
     If  reinvested,  Computershare  may sell the shares  purchased and send the
     proceeds to you, less any service fees  applicable,  brokerage  commissions
     and other  costs of sale.  After  processing  your  request to  discontinue
     dividend  reinvestment,  any dividends on any shares credited in book-entry


                                       19



     form or shares you hold in stock  certificate  form will be paid in cash by
     check or by electronic funds transfer. To have dividends deposited directly
     to your U.S bank account, see Question 10.

25.  Are there any fees charged to me as a Program participant?

Please refer to the tabular summary of Program fees that follows:

              Summary of Fees and Commissions
- -------------------------------------------------------------------
Transaction                              Fees/Commissions

- -------------------------------------------------------------------
Initial Enrollment Fee                      None
- -------------------------------------------------------------------
Additional Investment Purchase
(by check, money order or
automatic deductions)

           Sources of Shares
           -----------------
       -    Original Issue                  None
       -    Treasury                        None
       -    Open Market                     $0.05 per share
- -------------------------------------------------------------------
Reinvestment of Dividends Fee

           Sources of Shares
           -----------------
     -    Original Issue                    None
     -    Treasury                          None
     -    Open Market                       $0.05 per share
- -------------------------------------------------------------------
Selling Program shares                      $5.00 + $0.05 per
                                            share
- -------------------------------------------------------------------
Issuance of Certificates                    None

- -------------------------------------------------------------------
Deposit of Certificates                     None

- -------------------------------------------------------------------
Transfers of Shares                         None

- -------------------------------------------------------------------
Returned checks or failed                   $20.00
automatic deductions
- -------------------------------------------------------------------
Duplicate statements                        $5 per year
(2 years or older).                         (not to exceed $25.00)
- -------------------------------------------------------------------

Reports to Participants

26.  What kind of reports will I be sent?

     To  assist  you in your  record  keeping,  Computershare  will send you the
     following   information   (You  should  retain  these  statements  for  tax
     purposes):


                                       20



o    For  each  initial  cash  investment,  additional  cash  purchase,  sale or
     transfer that you make or receive, a statement detailing the transactions;

o    For each dividend  reinvested,  a statement  detailing all activity in your
     Program account for that quarter;

o    For any transactions you make after the fourth quarter dividend, an updated
     cumulative  statement  detailing  all activity in your Program  account for
     that year;

o    You  will  also  be  sent  copies  of  the  communications  sent  to  other
     shareholders.  These include  KeySpan's  annual reports,  notices of annual
     meeting and proxy statements,  company updates,  and income tax information
     for reporting  dividends paid and proceeds from the sale of Program shares.
     However, if you are a beneficial owner who participates through a broker or
     bank  nominee,  you  should  contact  your  broker  or bank  nominee  for a
     statement detailing reinvestment activity.

Federal Income Taxes

27.  What are the  Federal  Income Tax  consequences  of  participation  in this
     Program?

     This is a general discussion of the U.S. federal income tax consequences of
     the  program.  You should  consult your own tax advisor with respect to the
     tax consequences of participation in the program (including federal, state,
     local and  other tax laws and U.S.  withholding  laws)  applicable  to your
     particular situation.

     You will not realize gain or loss for U.S. federal income tax purposes upon
     a transfer of shares to your account or the withdrawal of whole shares from
     your account.

     You will  generally  realize  gain or loss upon the  receipt  of cash for a
     fractional  share  credited to your account.  You will also realize gain or
     loss  when  shares  are  sold.  The  amount  of gain  or  loss  will be the
     difference between the amount that you receive for the shares sold and your
     tax basis in the shares,  generally the amount you paid for the shares.  In
     order to  determine  the tax basis for  shares in your  account  you should
     retain all account statements.

     Generally,  cash dividends reinvested under the program will be taxable for
     U.S. federal income tax purposes as having been received by you even though
     you have not actually  received them in cash. The total amount of dividends
     paid to you during the year,  whether or not they are  reinvested,  will be
     reported to you and the U.S.  Internal  Revenue  Service  shortly after the
     close of each year.

     If you are a nonresident foreign stockholder whose dividends are subject to
     U.S. federal income tax  withholding,  the amount of the tax to be withheld
     will be deducted  from the amount of dividends  to determine  the amount of
     dividends to reinvest.

     Dividends  paid on shares in the  accounts  may be subject  to "the  backup
     withholding" provisions of the Internal Revenue Code. If you are subject to
     backup  withholding,  Computershare  must  withhold  and  pay  over  to the
     Internal Revenue Service 28% from the amount of dividends,  the proceeds of
     the  sale of a  fractional  share  and the  proceeds  of any  sale of whole
     shares, unless you are exempt from the withholding  requirements  described
     in Section 3406 of the Internal Revenue Code.


                                       21



Other Information

28.  What happens if KeySpan issues a stock dividend,  declares a stock split or
     has a rights offering?

     All stock dividends or split shares distributed by us on shares credited to
     your  Program  account  and/or on  shares  held by you in the form of stock
     certificates will be credited directly into your Program account.  You will
     receive a statement  indicating the number of shares or dividends earned as
     a  result  of  the  transactions.  This  includes  entitlements  on  shares
     calculated on book-entry shares and certificated  shares registered in your
     name.  In the case of a rights  offering,  your rights will be based on the
     full shares  credited to your Program  account and/or on shares held by you
     in the form of stock certificates.

29.  How will my shares be voted?

     For any meeting of Common Stock shareholders, all participants will receive
     proxy  materials  including a proxy card  representing  both the shares for
     which you hold stock  certificates  and the whole  shares  credited to your
     Program  account.  All shares will be voted as  designated by you or may be
     voted in person at shareholder meetings.

30.  What are not the  responsibilities  of KeySpan and Computershare  under the
     Program?

     In administering the Program,  KeySpan and Computershare will not be liable
     for any of the following acts done in good faith:

o    Any claim of  liability  with  respect to the  shares of Common  Stock of a
     deceased  participant's  Program  account  prior to  receipt  in writing of
     instructions relating to the disposition of such shares;

o    With respect to the prices at which shares of Common Stock are purchased or
     sold  for the  participant's  Program  account  and  the  times  when  such
     purchases or sales are made;

o    With  respect to any  fluctuation  in the market  value before or after any
     purchase or sale of shares of Common Stock.

     Holding  Common Stock under the Program is no different than holding shares
     on your own.  Neither KeySpan nor  Computershare  assure you of a profit or
     protect you from any losses sustained on the purchase of Common Stock under
     the Program.

31.  May the Program be changed or discontinued?

     We reserve the right to amend,  suspend,  discontinue or modify the Program
     at  any  time  without  the  approval  of   participants.   Notice  of  our
     determination  to suspend,  discontinue or modify the Program will be given
     to all Program participants as soon as practicable after such determination
     is made.  Changes  or  discontinuation  will not  affect  your  rights as a
     shareholder  in any way and any book- entry shares you own will continue to
     be  credited  to your  Program  account  unless  you  specifically  request
     otherwise.


                                       22



32.  Where can I find more information on KeySpan?

     We file annual,  quarterly and special reports,  proxy statements and other
     information  with the SEC. You may read and copy any of these  documents at
     the SEC's public  reference room at 100 F Street,  N.E.,  Washington,  D.C.
     20549.

     Please call the SEC at 1-800-SEC-0330 for further information on the public
     reference  rooms.  Our SEC filings are also  available to the public on the
     SEC's web site at www.sec.gov.

     KeySpan is subject to the reporting  requirements  of the Securities Act of
     1934.  In  accordance  to this Act,  the  Company  files  reports and other
     information with the SEC.

     You may also request  copies of our 10-K,  10-Q,  annual  reports and proxy
     statements directly from KeySpan by:




                                                           
     Mail:                               Telephone:               Internet:
     KeySpan Corporation                 718-403-3196             www.keyspanenergy.com
                                                                  ---------------------
     Investor Relations                                           (Investor Relations Section)
     One MetroTech Center, 22nd Floor
     Brooklyn, NY 11201










                                       23




                                 USE OF PROCEEDS

     At present,  Program shares are purchased from the open market. The Company
does not receive any of the proceeds from the sale of shares when Program shares
are purchased on the open market.  The Program also provides for the issuance of
Common Stock  directly from the Company either from shares held in the Company's
treasury or as newly  issued  shares.  To the extent that shares of Common Stock
are  purchased  directly  from the Company,  the net proceeds are expected to be
used for general corporate  purposes.  The Company cannot estimate the number of
shares of Common  Stock that the  Company  will sell  through the Program or the
prices at which such shares will be sold.

                              PLAN OF DISTRIBUTION

     The shares of Common Stock will be offered directly to Program participants
without underwriters as described in this prospectus.

                                 LEGAL OPINIONS

     The validity of the Common Stock offered by us in this  prospectus  will be
passed upon for us by John J. Bishar,  Jr., in his  capacity as  Executive  Vice
President  and  General  Counsel  of  KeySpan  Corporation.  Mr.  Bishar  is the
beneficial owner of or has the option to acquire approximately 142,236 shares of
our Common Stock.

                                     EXPERTS

     The financial  statements,  the related financial statement schedules,  and
management's  report on the  effectiveness  of internal  control over  financial
reporting incorporated in this prospectus by reference from the Company's Annual
Report on Form 10-K have been  audited by Deloitte & Touche LLP, an  independent
registered  public  accounting  firm,  as  stated  in their  reports,  which are
incorporated  herein by  reference,  (which  reports (1) express an  unqualified
opinion on the  financial  statements  and  financial  statement  schedules  and
include  an  explanatory  paragraph  related to the  adoption  of  Statement  of
Financial  Accounting  Standards  (SFAS) No.142,  "Goodwill and Other Intangible
Assets" as discussed in Note 1(G), the adoption of SFAS No. 148, "Accounting for
Stock-Based  Compensation-Transition  and Disclosure" as discussed in Note 1(N),
the adoption of SFAS No. 143  "Accounting for Asset  Retirement  Obligations" as
discussed in Note 1(P) and the adoption of Financial  Accounting Standards Board
Interpretation  No.  46,   "Consolidation  of  Variable  Interest  Entities,  an
Interpretation  of ARB  No.  51" as  discussed  in Note  1(P),  (2)  express  an
unqualified  opinion on management's  assessment  regarding the effectiveness of
internal  control  over  financial  reporting,  and (3)  express an  unqualified
opinion on the effectiveness of internal control over financial reporting),  and
have been so  incorporated  in reliance upon the reports of such firm given upon
their authority as experts in accounting and auditing.

                     INCORPORATION OF DOCUMENTS BY REFERENCE

     We file annual,  quarterly and special reports,  proxy statements and other
information  with the SEC.  You may read and copy any of these  documents at the
SEC's public  reference  room at 100 F Street,  N.E.,  Washington,  D.C.  20549.
Please  call the SEC at  1-800-SEC-0330  for further  information  on the public
reference  room.  Our SEC filings are also  available to the public on the SEC's
web site at www.sec.gov.

     The SEC allows us to  "incorporate  by reference" the  information  that we
file with the SEC, which means that we can disclose important information to you
by referring you to those documents.  The information  incorporated by reference
is considered to be part of this prospectus,  and later information that we file
with the SEC will  automatically  update  and  supersede  this  information.  We


                                       24



incorporate by reference the documents  listed below and any future filings made
with the SEC  under  Sections  13(a),  13(c),  14,  or  15(d) of the  Securities
Exchange Act of 1934 until all of the securities are sold.


o    Our Annual Report on Form 10-K for the fiscal year ended December 31, 2004;

o    Our Quarterly Report on Form 10-Q for the quarterly periods ended March 31,
     2005, June 30, 2005 and September 30, 2005;

o    Our Current  Reports on Form 8-K dated February 7, 2006,  January 24, 2006,
     January 10, 2006,  December 14, 2005,  November 8, 2005,  November 4, 2005,
     November 1, 2005,  August 4, 2005,  June 30, 2005,  June 29, 2005,  May 27,
     2005,  May 20, 2005, May 16, 2005,  May 2, 2005,  April 29, 2005,  April 1,
     2005,  March 30, 2005,  March 24, 2005,  March 16, 2005  February 25, 2005,
     February 16, 2005, February 1, 2005, January 31, 2005 and January 4, 2005.

o    Our Form 8-A filed May 26, 1998  pursuant to Section  12(b) of the Exchange
     Act which provides a description of the Company's Common Stock.

     You may request a copy of these filings,  at no cost,  over the Internet at
our website at www.keyspanenergy.com or by writing or calling us at:

                               Investor Relations
                               KeySpan Corporation
                        One MetroTech Center, 22nd Floor
                            Brooklyn, New York, 11201
                                 (718) 403-3196

     You  should  rely only on the  information  incorporated  by  reference  or
provided in this  prospectus or any  supplement.  We have not authorized  anyone
else to provide you with different information.

     We also  undertake to provide  without charge to each person to whom a copy
of this prospectus has been  delivered,  upon the written or oral request of any
such person,  a copy of any or all of the  documents  and  exhibits  referred to
above which have been or may be  incorporated  by reference in this  prospectus.
Exhibits not  specifically  incorporated  herein by reference  will be furnished
upon payment of 25 cents per page.  Requests for such copies  should be directed
to Investor Relations,  KeySpan  Corporation,  One MetroTech Center, 22nd Floor,
Brooklyn, New York 11201 or by calling Investor Relations at (718) 403-3196.

                      DISCLOSURE OF COMMISSION POSITION ON
                 INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be  permitted  to  directors,  officers or persons  controlling  the
registrant  pursuant  to the  foregoing  provisions,  the  registrant  has  been
informed  that in the opinion of the  Securities  and Exchange  Commission  such
indemnification  is  against  public  policy  as  expressed  in the  Act  and is
therefore unenforceable.







                                       25




                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 14. Other Expenses of Issuance and Distribution.

SEC Registration Fee..................................................$19,376.10
Accounting Fees.......................................................$20,000.00
Miscellaneous Expenses................................................$25,000.00
Total Expenses........................................................$64,376.10

Item 15. Indemnification of Directors and Officers.

     The New York Business Corporation Law ("BCL"),  Article 7, Sections 721-726
provide for the  indemnification  and  advancement  of expenses to officers  and
directors. Section 721 provides that indemnification and advancement pursuant to
the BCL are not  exclusive  of any other  rights an officer or  director  may be
entitled to, provided that no indemnification may be made to or on behalf of any
director  or officer if a judgment or other  final  adjudication  adverse to the
director or officer  establishes  that his acts were  committed  in bad faith or
were the result of active and  deliberate  dishonesty  and were  material to the
cause of action so  adjudicated,  or that the  director  or  officer  personally
gained a financial  profit or other advantage to which he or she was not legally
entitled.

     Section 722 of the BCL provides that a corporation may indemnify an officer
or  director,  in the case of third party  actions,  against  judgments,  fines,
amounts  paid  in  settlement  and  reasonable  expenses  and,  in the  case  of
derivative actions,  against amounts paid in settlement and reasonable expenses,
provided that the director or officer  acted in good faith,  for a purpose which
he or she  reasonably  believed to be in the best  interests of the  corporation
and, in the case of criminal  actions,  had no  reasonable  cause to believe his
conduct was unlawful. In addition, statutory indemnification may not be provided
in derivative  actions (i) which are settled or otherwise disposed of or (ii) in
which the director or officer is adjudged liable to the corporation,  unless and
only to the extent a court  determines  that the person is fairly and reasonably
entitled to indemnity.

     Section 723 of the BCL provides that statutory indemnification is mandatory
where the director or officer has been  successful,  on the merits or otherwise,
in the defense of a civil or  criminal  action or  proceeding.  Section 723 also
provides that expenses of defending a civil or criminal action or proceeding may
be advanced by the  corporation  upon receipt of an undertaking to repay them if
and to the  extent the  recipient  is  ultimately  found not to be  entitled  to
indemnification.  Section 725 provides for  repayment of such  expenses when the
recipient is ultimately found not to be entitled to indemnification. Section 726
provides that a corporation may obtain  indemnification  insurance  indemnifying
itself and its directors and officers.  The registrant  has in effect  insurance
policies  providing both directors and officers liability coverage and corporate
reimbursement coverage.

     Section  402(b) of the BCL provides that a  corporation  may include in its
certificate of incorporation a provision  limiting or eliminating,  with certain
exceptions,  the  personal  liability  of  directors  to a  corporation  or  its
shareholders  for  damages  for  any  breach  of  duty  in  such  capacity.  The


                                       26



certificate of incorporation of the registrant contains  provisions  eliminating
the personal  liability of directors or officers to the extent  permitted by New
York law.

     The registrant's  certificate of incorporation  provides  generally that it
shall,  except to the extent expressly  prohibited by the BCL, indemnify each of
its officers and directors  made or threatened to be made a party to any action,
suit or proceeding,  or appeal  thereof,  whether civil or criminal by reason of
the fact that such person is or was an officer or director  against all expense,
liability  and  loss  (including,  but  not  limited  to  all  attorneys'  fees,
judgments, fines, pension plan taxes or penalties and amounts paid or to be paid
in  settlement)  reasonably  incurred or  suffered by such person in  connection
therewith. The certificate of incorporation further provides for advancement and
reimbursement  of such expenses  incurred by an officer or director in defending
any  action or  proceeding  in  advance of the final  disposition  thereof  upon
receipt of an  undertaking  by such  person to repay such  amount if, and to the
extent  that,   such  person  is   ultimately   found  not  to  be  entitled  to
indemnification.

Item 16. List of Exhibits.

     See Exhibit Index

Item 17. Undertakings.

(a) The undersigned registrant hereby undertakes:

     (1) To file,  during any period in which  offers or sales are being made, a
post-effective amendment to this registration statement:

     (i)  To  include  any  prospectus  required  by  Section  10(a)(3)  of  the
          Securities Act of 1933;

     (ii) To reflect in the  prospectus  any facts or events  arising  after the
          effective  date of the  registration  statement  (or the  most  recent
          post-effective  amendment  thereof)  which,  individually  or  in  the
          aggregate, represent a fundamental change in the information set forth
          in the  registration  statement.  Notwithstanding  the foregoing,  any
          increase  or decrease  in volume of  securities  offered (if the total
          dollar  value of  securities  offered  would not exceed that which was
          registered)  and  any  deviation  from  the  low  or  high  end of the
          estimated  maximum  offering  range  may be  reflected  in the form of
          prospectus  filed with the  Commission  pursuant to Rule 424(b) if, in
          the aggregate,  the changes in volume and price represent no more than
          a 20% change in the maximum aggregate  offering price set forth in the
          "Calculation of Registration Fee" table in the effective  registration
          statement;

     (iii) To  include  any  material  information  with  respect to the plan of
          distribution not previously disclosed in the Registration Statement or
          any material change to such information in the Registration Statement;

          provided,  however,  That:

          paragraphs  (a)(1)(i) and (a)(1)(ii) do not apply if the  Registration
          Statement  is on Form S-3,  Form S-8, or Form F-3 and the  information
          required  to  be  included  in a  post-effective  amendment  by  those
          paragraphs is contained in periodic reports filed with or furnished to


                                       27


          the  Securities  and  Exchange  Commission  by the Issuer  pursuant to
          Section 13 or Section  15(d) of the  Securities  Exchange  Act of 1934
          that are incorporated by reference in the Registration Statement.

     (2) That, for the purpose of determining any liability under the Securities
Act of 1933,  each  such  post-effective  amendment  shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

     (3) To remove from registration by means of a post-effective  amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     (4) That, for the purpose of determining liability under the Securities Act
of 1933 to any purchaser:

     i.   If the registrant is relying on Rule 430B (230.430B of this chapter):

          A.   Each  prospectus  filed  by  the  registrant   pursuant  to  Rule
               424(b)(3)shall be deemed to be part of the registration statement
               as of the  date  the  filed  prospectus  was  deemed  part of and
               included in the registration statement; and

          B.   Each prospectus  required to be filed pursuant to Rule 424(b)(2),
               (b)(5), or (b)(7) as part of a registration statement in reliance
               on Rule  430B  relating  to an  offering  made  pursuant  to Rule
               415(a)(1)(i),  (vii),  or (x) for the  purpose of  providing  the
               information  required by section 10(a) of the  Securities  Act of
               1933  shall  be  deemed  to  be  part  of  and  included  in  the
               registration statement as of the earlier of the date such form of
               prospectus is first used after  effectiveness  or the date of the
               first contract of sale of securities in the offering described in
               the prospectus.  As provided in Rule 430B, for liability purposes
               of the issuer and any person that is at that date an underwriter,
               such  date  shall be  deemed  to be a new  effective  date of the
               registration   statement   relating  to  the  securities  in  the
               registration  statement to which that prospectus relates, and the
               offering  of such  securities  at that time shall be deemed to be
               the initial bona fide offering thereof.  Provided,  however, that
               no statement made in a registration  statement or prospectus that
               is  part of the  registration  statement  or  made in a  document
               incorporated  or  deemed   incorporated  by  reference  into  the
               registration   statement  or  prospectus  that  is  part  of  the
               registration  statement  will,  as to a purchaser  with a time of
               contract  of sale  prior to such  effective  date,  supersede  or
               modify any statement that was made in the registration  statement
               or prospectus that was part of the registration statement or made
               in any such document immediately prior to such effective date.

     (5) That, for the purpose of determining  liability of the registrant under
the Securities Act of 1933 to any purchaser in the initial  distribution  of the
securities:  The undersigned registrant undertakes that in a primary offering of
securities  of  the  undersigned   registrant   pursuant  to  this  registration
statement,  regardless of the underwriting method used to sell the securities to
the purchaser,  if the securities are offered or sold to such purchaser by means
of any of the following  communications,  the  undersigned  registrant will be a
seller to the purchaser and will be considered to offer or sell such  securities
to such purchaser:

     i.   Any preliminary prospectus or prospectus of the undersigned registrant
          relating to the offering required to be filed pursuant to Rule 424;

                                       28




     ii.  Any free writing prospectus relating to the offering prepared by or on
          behalf of the  undersigned  registrant  or used or  referred to by the
          undersigned registrant;

     iii. The  portion  of any other free  writing  prospectus  relating  to the
          offering  containing   material   information  about  the  undersigned
          registrant  or  its  securities  provided  by  or  on  behalf  of  the
          undersigned registrant; and

     iv.  Any other  communication  that is an offer in the offering made by the
          undersigned registrant to the purchaser.

     (b) The  undersigned  registrant  hereby  undertakes  that, for purposes of
determining  any liability  under the Securities Act of 1933, each filing of the
registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan's  annual  report  pursuant  to  Section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     (c) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors,  officers and controlling  persons of
such  registrant  pursuant  to the  provisions  referred  to in  Item 15 of this
registration  statement,  or otherwise,  the registrant has been advised that in
the opinion of the Securities and Exchange  Commission such  indemnification  is
against public policy as expressed in such Act and is, therefore, unenforceable.
In the event that a claim for  indemnification  against such liabilities  (other
than the payment by such registrants of expenses incurred or paid by a director,
officer or controlling  person of such registrants in the successful  defense of
any  action,  suit or  proceeding)  is  asserted  by such  director,  officer or
controlling  person in connection  with the  securities  being  registered,  the
registrant  will,  unless in the  opinion  of its  counsel  the  matter has been
settled by controlling precedent,  submit to a court of appropriate jurisdiction
the question  whether such  indemnification  by it is against  public  policy as
expressed  in the  Securities  Act of 1933 and  will be  governed  by the  final
adjudication of such issue.









                                       29






                                   SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, KeySpan  Corporation
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for filing on Form  S-3/A and has duly  caused  this  registration
statement  amendment  to be signed on its behalf by the  undersigned,  thereunto
duly authorized,  in the City of Brooklyn, State of New York, on the 14th day of
February, 2006.

KEYSPAN CORPORATION
Issuer of Securities
(Registrant)

By: /s/ Gerald Luterman
    -------------------
Gerald Luterman
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)

Pursuant to the  requirements of the Securities Act of 1933,  this  registration
statement has been signed below by the following  persons in the  capacities and
on the dates indicated above.


Signatures and Titles:



/s/ Robert B. Catell
- --------------------
Robert B. Catell
Chief Executive Officer and Chairman of the Board
(Principal Executive Officer)


/s/ Gerald Luterman
- -------------------
Gerald Luterman
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)


/s/ Theresa A. Balog
- --------------------
Theresa A. Balog
Vice President and Chief Accounting Officer
(Principal Accounting Officer)



*
- ---------------------
Andrea S. Christensen
Director



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*
- ---------------------
Robert J. Fani
President, Chief Operating Officer and Director


*
- ---------------------
Alan H. Fishman
Director


*
- ---------------------
James R. Jones
Director


*
- ---------------------
James L. Larocca
Director


*
- ---------------------
Gloria C. Larson
Director


*
- ---------------------
Stephen W. McKessy
Director


*
- ---------------------
Edward D. Miller
Director


*
- ---------------------
Vikki L. Pryor
Director


*    Such signature has been affixed pursuant to a power of attorney  previously
     filed as an exhibit.




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                                  EXHIBIT INDEX



Exhibit Number      Description of Exhibits
- --------------      -----------------------

    5*              Opinion of John J.  Bishar,  Jr. as to the  legality  of the
                    Common Stock to be issued

    23-a            Consent of  Deloitte & Touche  LLP,  Independent  Registered
                    Public Accounting Firm

    23-b*           Consent of John J.  Bishar,  Jr.  (contained  in his Opinion
                    filed as Exhibit)

    24-a*           Powers of Attorney

    24-b*           Certified  resolution  of the Board of  Directors of KeySpan
                    authorizing signatures pursuant to power of attorney

- -----------------
* Previously filed.









                                       32