Exhibit 99.1

KEYSPAN
                                                                  NEWS
- --------------------------------------------------------------------------------
KeySpan Corporation                                       For Immediate Release


Contacts:      Investors                                   Media Relations
               George Laskaris                             Ed Yutkowitz
               718.403.2526                                718.403.2523


                         KeySpan Announces 2005 Guidance
                         -------------------------------

        Targets 9-10% Total Shareholder Return with 4-5% Earnings Growth

                        Reaffirms 2004 Earnings Guidance


Brooklyn, New York, December 6, 2004 - KeySpan Corporation (NYSE: KSE) announced
today that it forecasts  2005 earnings in the range of $2.30 to $2.40 per share,
primarily  driven by continued  strong  contributions  from its gas and electric
businesses.  This is an increase of 4% to 5% over  projected  2004 earnings from
core  operations,  excluding  2004 special items and including the impact of the
MEDS conversion to equity in May 2005.

The Company also reaffirmed its prior forecast for 2004 consolidated earnings of
$2.55 to $2.75 per share,  excluding all special items noted in the table at the
end of this press release.  This guidance includes earnings from continuing core
operations of $2.20 to $2.30 per share, as well as $0.35 to $0.45 per share from
its now divested investment in The Houston Exploration Company.

"KeySpan is on track for sustainable  growth. We have  successfully  executed on
the sales of our non-core assets,  generating  proceeds of over $1.7 billion. In
the Northeast markets we are  well-positioned for growth in our gas and electric
businesses," said Robert B. Catell,  Chairman and Chief Executive Officer.  "Our
2005  earnings  guidance  reflects  growth of 4% to 5%,  supported by our strong
financial  condition,   the  organic  growth  of  our  gas  business,   and  the
contribution of our new 250 MW Ravenswood  generation  expansion in our electric
business.  Our growth will  continue to be  efficient,  as we remain  focused on
investment opportunities, as well as expense management."




Business Drivers

The Gas Distribution business continues to add gas conversions and new customers
across all its gas distribution  territories,  and is expected to add an optimal
gross profit margin level of $47 million in 2005.  The low  saturation  level of
natural  gas  in  its  service  areas  allows  for  significant  organic  growth
opportunities.  The Company expects to further enhance profitability by reducing
both its capital and operating expenditures.

The  Electric  Services  business  is  expected  to  continue to provide a solid
earnings contribution from its contractual and load pocket operations in the New
York City and Long Island  regions.  The Company added to its asset  portfolio a
250 MW  generating  plant  located at the  existing  Ravenswood  facility in the
second quarter of 2004.

As previously  announced,  the Company is  conducting a strategic  review of its
Energy  Services  segment.  In accordance  with that, the Company has decided to
retain the Home Energy Services division,  which complements  KeySpan's core gas
distribution  business.  The Company  also  decided to monetize  the  mechanical
contracting  businesses within the Business Solutions division.  It continues to
evaluate the Professional Services business.

In addition,  the Company has  effectively  completed its commitment to monetize
its non-core  assets by selling out of its ownership  interest in KeySpan Canada
through  an income  trust.  This  divestiture  is  reflected  in the lower  2005
guidance for the Energy Investments segment, which now primarily consists of gas
pipeline,  storage,  and LNG  assets to  support  the core gas  business  in the
Northeast.  This segment also includes the Seneca Upshur subsidiary,  which owns
oil and gas production assets in West Virginia and Pennsylvania and was acquired
from The Houston Exploration Company this year.


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Financial Update

The Company has  increased its annual  dividend to $1.82 per share,  starting in
February  2005.  The  current  dividend  of $1.78 per share  provides a yield of
approximately 4.5%.

Maintenance capital  expenditures in 2005 are projected to be approximately $425
million, essentially level with estimated 2004 levels.

Also,  the Company's  total debt to total  capitalization  ratio,  as calculated
under the Company's  credit facility,  is projected to be  approximately  50% at
year-end  2004,  which is an  improvement of over 800 basis points from 58.3% at
year-end 2003. From a GAAP perspective,  the total debt to total  capitalization
ratio is projected to decrease from 62.0% at year-end 2003 to approximately  54%
at the end of 2004.

Proceeds  to  KeySpan  of   approximately   $1.7  billion  from  non-core  asset
transactions,  including  KeySpan  Canada and The Houston  Exploration  Company,
generated gains of over $300 million, and will be used to reduce debt levels and
fund future  investments.  These  investments would include projects such as the
Islander East and Millennium pipelines,  our Providence LNG plant expansion, gas
storage, generation, and other strategic assets in the Northeast.

"KeySpan enjoys a strong financial position, from an earnings, balance sheet and
liquidity  perspective,"  Mr.  Catell  concluded.  "This  position  supports our
dividend with its  sustainable  and stable yield,  which combined with KeySpan's
earnings growth, should result in a solid return of 9-10% to our shareholders."

Company Presentation and Webcast

KeySpan's management team will conduct presentations on Monday, December 6, 2004
in New York City, and on Tuesday,  December 7, 2004 in Boston.  The presentation
is     posted     on     KeySpan's     Investor     Relations     Website     at
http://investor.keyspanenergy.com.
- ----------------------------------

In addition,  investors are also invited to participate in a live Webcast of the
presentation:  Monday,  December  6, 2004 12:30 p.m.  (EST)  KeySpan's  website:
http://investor.keyspanenergy.com
- ---------------------------------


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The following are the key  assumptions  employed in  developing  KeySpan's  2005
forecast:

     Gas

o    $47 Million in new gas Gross Profit Margin added

o    $5 Million  increase for  Performance  Based Rate adjustment in Boston rate
     case

o    $8  Million  increase  for  Pension  adjustment  in Boston  rate case o $10
     Million  reduction  in gas  growth  capital  expenditures  o Normal  winter
     weather

     Electric

o    $20 to $25 per megawatt-hour average Ravenswood peak spark spread

o    $90 to $100 per kilowatt-year average Ravenswood capacity payment

o    Full year of commercial operation for the 250 MW expansion at Ravenswood

o    Operating income from LIPA contracts - similar to 2004 level

o    Normal summer weather

     Corporate

o    Operations & Maintenance expenses - similar to 2004 level

o    Range of 4% - 5% for average short-term interest rates

o    Equity issuance of $460 M in May due to MEDS conversion



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2005 Guidance
- ---------------------------------------------------------------------------------------------------------------------
Operating Income                                                         ($ millions except per share amounts)
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Gas Distribution                                                                      $590 - $610
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Electric Services                                                                     $270 - $290
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Energy Services                                                                        Breakeven
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Energy Investments
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      Exploration & Production                                                            N/A
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      Other Energy Investments                                                         $10 - $15
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Other / Reconciliations                                                                 $0 - $20
- ---------------------------------------------------------------------------------------------------------------------
Total Operating Income                                                                $870 - $935
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- ---------------------------------------------------------------------------------------------------------------------
Other Income & Deductions                                                              $15 - $25
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Interest                                                                            ($250) - ($270)
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Taxes                                                                               ($250) - ($270)
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Preferred Dividends                                                                       ($6)
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- ---------------------------------------------------------------------------------------------------------------------
Consolidated Earnings (from Continuing Operations)                                    $390 - $405
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Average Shares Outstanding (millions)                                                     169
- ---------------------------------------------------------------------------------------------------------------------
Earnings Per Share (from Continuing Operations)                                      $2.30 - $2.40
- ---------------------------------------------------------------------------------------------------------------------
Notes:   Does not foot due to rounding and ranges



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Below is a description of the special items for 2004 through the third quarter
and their impact on consolidated earnings.



- ---------------------------------------------- -------------------------- --------------------------------
Special Items                                         (millions)                Earnings per share
- ---------------------------------------------- -------------------------- --------------------------------
                                                                             
Goodwill Impairment Charge in Energy Services           $(90.4)                       $(0.56)
- ---------------------------------------------- -------------------------- --------------------------------
Debt Redemption Premiums                                $(29.3)                       $(0.18)
- ---------------------------------------------- -------------------------- --------------------------------
Transfer of THX                                         $150.1                         $0.94
- ---------------------------------------------- -------------------------- --------------------------------
Deferred Tax Provision on Remaining THX                 $(44.1)                       $(0.28)
investment
- ---------------------------------------------- -------------------------- --------------------------------
Sale of KeySpan Canada                                   $10.1                         $0.06
- ---------------------------------------------- -------------------------- --------------------------------
Ceiling Test Writedown in E&P                           $(31.1)                       $(0.19)
- ---------------------------------------------- -------------------------- --------------------------------
Total Year-to-Date (9/30/04)                            $(34.7)                       $(0.21)
- ---------------------------------------------- -------------------------- --------------------------------
2004 Earnings Guidance (excluding special                  -                       $2.55 - $2.75
items)
- ---------------------------------------------- -------------------------- --------------------------------
2004 Earnings Guidance (including special                  -                       $2.76 - $2.96
items)
- ---------------------------------------------- -------------------------- --------------------------------
Does not foot due to rounding



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A member of Standard & Poor's 500 Index,  KeySpan Corporation  (NYSE:KSE) is the
largest  distributor of natural gas in the Northeast with 2.5 million customers,
operating  regulated  natural gas utilities in New York,  Massachusetts  and New
Hampshire which do business as KeySpan Energy  Delivery.  This customer  focused
business  is  complemented  by the  Energy  Services  business  which  offers  a
portfolio  of  energy-related  products,  services  and  solutions  to homes and
businesses. KeySpan is also the largest owner of electric generation in New York
State.  We own  approximately  6,650  megawatts of  generating  capacity,  which
provides power to the 1.1 million  customers of the Long Island Power  Authority
and supplies 25% of New York City's capacity needs. In addition to these assets,
KeySpan  has  strategic  investments  in  production,  pipeline  transportation,
distribution and storage,  and owns minority interest in natural gas exploration
and Canadian gas processing.  KeySpan has  headquarters in Brooklyn,  Boston and
Long Island.

Certain  statements  contained  herein  are  forward-looking  statements,  which
reflect  numerous  assumptions  and  estimates and involve a number of risks and
uncertainties.  For these statements, we claim the protection of the safe harbor
for  forward-looking  statements  provided by the Private Securities  Litigation
Reform Act of 1995. There are possible  developments that could cause our actual
results  to  differ   materially  from  those   forecasted  or  implied  in  the
forward-looking  statements.  You are cautioned  not to place undue  reliance on
these forward-looking statements,  which are current only as of the date of this
filing.  We  disclaim  any  intention  or  obligation  to update  or revise  any
forward-looking  statements,  whether  as a result  of new  information,  future
events or otherwise. Among the factors that could cause actual results to differ
materially are: general economic conditions,  especially in the Northeast United
States;  available  sources and costs of fuel;  volatility of energy prices in a
deregulated  market environment as well as in the source of natural gas and fuel
used to generate electricity;  potential write-down of the carrying value of our
investment in certain  unregulated  subsidiaries and natural gas properties when
natural gas prices are depressed or if we have significant downward revisions in
our estimated proved gas reserves; federal and state regulatory initiatives that
increase  competition,  threaten  cost and  investment  recovery and impact rate
structure;   our   ability  to   successfully   reduce   our  cost   structures;
implementation  of new  accounting  standards;  the  degree to which we  develop
unregulated business ventures,  as well as federal and state regulatory policies
affecting our ability to retain and operate those business ventures; our ability
to  identify  and make  complementary  acquisitions,  as well as the  successful
integration of those  acquisitions;  inflationary trends and interest rates; and
risks detailed from time to time in reports and other documents filed by us with
the Securities and Exchange Commission.



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