Exhibit 99.1

                                                                           NEWS
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KeySpan Corporation                                       For Immediate Release


Contacts:   Investors                                     Media Relations
            George Laskaris                               Ed Yutkowitz
            718.403.2526                                  718.403.2523


                  KeySpan Announces Strong 1st Quarter Results
                     Core Earnings 7% Ahead of Last Year and
                        8% Ahead of Wall Street Consensus

Brooklyn,  New York, April 29, 2005 - KeySpan  Corporation (NYSE: KSE) announced
consolidated  GAAP earnings from  continuing  operations,  less preferred  stock
dividends,  of $234.4  million or $1.45 per share for the first quarter of 2005,
as compared to $246.2  million or $1.54 per share for the same period last year.
Core  earnings  were $1.49 per share for 2005,  compared  to $1.39 per share for
2004, an increase of 7% year over year,  after excluding the two items discussed
below. This was also 8% ahead of Wall Street  consensus.  2005 results include a
special  item charge of $0.04 per share  associated  with the  premiums  paid to
redeem  $500  million of  outstanding  bonds in January of this year.  The first
quarter  2004  results  include  earnings  of  $0.15  per  share  from  non-core
investments in E&P and gas processing, which were sold later in that year.

"I am delighted with the first quarter  results,  which are primarily due to the
excellent  performance  of our core gas and electric  businesses.  These results
reflect the growth of these  businesses,  despite  weather  that was warmer than
last  year,"  said  Robert B.  Catell,  Chairman  and Chief  Executive  Officer.
"Customer  growth in the gas  business is ahead of plan,  and we are on track to
achieve  close to $50  million in new gross  profit  margin  this year.  Our gas
distribution  system  performed  reliably  during  the  extremely  cold  weather
experienced  in January,  when record gas sendouts were set in New York. The new
250 MW combined cycle unit at the Ravenswood  generating station  contributed to
the performance in the electric  business.  In addition,  our financial position
was  strengthened  by the bond redemption  completed this quarter,  resulting in

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lower interest expense and enhancing our capital structure. With the sale of the
Premier  pipeline in Northern  Ireland in March, we have now completed the sales
of all our non-core assets."

Operating  income was $438.7 million in the first quarter,  up $22 million or 5%
over 2004,  excluding  last year's  contribution  from The  Houston  Exploration
Company  (NYSE:THX)  and KeySpan  Canada  (TSE:KEY.UN).  The main driver of this
increase was the gas distribution business, which benefited from new load growth
and customer additions.  The electric services segment improved due to the added
capacity  at  the  Ravenswood  generating  station  that  went  into  commercial
operation in the second  quarter of last year. The energy  services  segment was
essentially flat with last year, after excluding  working capital writeoffs from
2004.

Segment  Highlights  Results  from  continuing  operations  in 2005 and 2004 are
reported on an Operating Income basis as follows:




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      Operating Income / (Loss) [$ millions]           1st Quarter 2005             1st Quarter 2004
      --------------------------------------           ----------------             ----------------
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Gas Distribution                                              391.9                         379.7
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Electric Services                                              51.0                          47.2
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Energy Investments
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     Houston Exploration                                          -                          62.1
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     Other Energy Investments                                   6.4                          12.9
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   Subtotal Energy Investments                                  6.4                          75.0
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Energy Services                                                (2.8)                        (17.5)
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Total Operating Segments                                      446.5                         484.4
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Other                                                          (7.8)                          3.2
                                                              ------                        -----
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Total Operating Income from Continuing Operations             438.7                         487.6
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Total Operating Income from Continuing Operations
excluding Houston Exploration and KeySpan Canada              438.7                         416.9
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Notes:

     -    Operating Income in the Energy  Investments  segment for 2004 reflects
          100% of KeySpan's interest in Houston Exploration for the three months
          ended March 31, as compared to 0% in 2005.

     -    Operating Income in the Energy  Investments  segment for 2004 reflects
          100% of  KeySpan's  interest  in KeySpan  Canada for the three  months
          ended March 31, as compared to 0% in 2005.

     -    Operating Income in the Energy Investments segment for 2004 includes a
          contribution  of $8.6  million  from  KeySpan  Canada,  in addition to
          equity income from other investments.

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Key Operating Income Drivers by Segment

o    Our Gas Distribution  segment,  which serves New York City, Long Island and
     New England,  reported operating income of $392 million, an increase of $12
     million or 3% over the same period last year. These results  benefited from
     higher net revenues of $21 million,  primarily from new customer  additions
     and  oil-to-gas  conversions,  as well as higher  sales in the large volume
     heating market.  During the quarter,  KeySpan completed more than 8,400 gas
     installations,  which  should add  approximately  $9.3 million in new gross
     profit margin.  Compared to last year,  weather was approximately 5% warmer
     in New York and 2% warmer in New England.  The positive results were offset
     by an increase in operating expenses of approximately $9 million, primarily
     attributable  to a larger  provision for  uncollectible  accounts driven by
     higher  gas  prices  and higher  depreciation  expense  resulting  from the
     ongoing investment in the gas distribution system.

o    The Electric Services segment reported  operating income of $51 million for
     the first  quarter,  which was $4 million or 8% higher than the same period
     last year,  reflecting  higher net revenue  due to the  addition of the new
     Ravenswood  generating unit and earned LIPA  incentives.  This segment owns
     and operates generation in the New York City and Long Island "load pockets"
     and manages the Long Island Power Authority's transmission and distribution
     system under long-term  contracts.  These excellent  results were partially
     offset by an increase in operating  expenses  associated with the operating
     lease costs for the Ravenswood  expansion and seasonal maintenance expenses
     necessary to have the plants ready for the summer season.

o    The Energy  Investments  segment  reported  operating income for 2005 of $6
     million,  compared  to $75  million  in 2004.  This  segment  includes  the
     Company's Seneca Upshur gas exploration and production operations,  as well
     as certain other  domestic  energy  related  investments.  The 2004 results
     included  the  Company's  ownership  interest  in Houston  Exploration  and
     KeySpan  Canada.  Excluding  the  results  of the  operations  of these two
     divestitures,  which  occurred in 2004,  operating  income of $6.4  million
     increased  $2  million,  primarily  associated  with the new Seneca  Upshur
     subsidiary, acquired last June.

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o    The Energy  Services  segment  reported a seasonal  operating  loss of $2.8
     million  for the first  quarter,  as  compared  to a loss of $17.5  million
     incurred last year.  This segment  includes  companies  that provide energy
     related  services to homes and  businesses  in the New York City and Boston
     metropolitan  areas.  After adjusting 2004 results to reflect writedowns of
     $14 million for accounts  receivable and inventory  balances,  this segment
     was  essentially  flat year over year.  During the first  quarter,  KeySpan
     completed the  divestiture of the  mechanical  contracting  companies,  and
     their results are now accounted for as discontinued operations.

Financial Update

The Company continued to strengthen its liquidity and financial  position during
the quarter,  through  redemptions of outstanding  bonds using proceeds from the
non-core assets sales  completed  during 2004. In the first quarter of 2005, the
Company redeemed $500 million in outstanding bonds with a coupon of 6.15%, which
strengthened  the capital  structure  of the Company.  Interest  expense for the
quarter  decreased  29% as a result of a lower  outstanding  debt  level of $3.9
billion, as compared to $5.5 billion for the same quarter last year.

During the quarter the Company also  successfully  completed the  remarketing of
the debt component of its $460 million MEDS Equity Units at 4.9%.  Subsequently,
the Company  exchanged $300 million of 3-year 4.9% notes for 30-year 5.8% notes,
capitalizing on the low interest rate  environment and extending the maturity of
its debt portfolio.

At the end of the first  quarter,  the  Company's  debt to total  capitalization
ratio on a GAAP basis was 51.4%, as compared to 57.4% at year-end.

The Company declared an increased  quarterly common stock dividend of $0.455 per
share,  payable  February 1, 2005, to  shareholders  of record as of January 12,
2005.  This is the  Company's  27th  consecutive  quarter of paying a  dividend,
building  upon  its  long-standing   commitment  of  dividend  payments  to  its

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shareholders.  The new annual  dividend  rate of $1.82 per share is supported by
the Company's  strong cash flows and provides a yield to shareholders of 4.5% to
5%, as well as an excellent platform for future growth in the dividend.



2005 Earnings Outlook

KeySpan's  2005  earnings  guidance  remains  at $2.30 to $2.40  per  share,  as
announced in December 2004,  excluding special items. This guidance includes the
$0.10 per share  dilutive  effect  anticipated  with the  conversion of the MEDS
Equity Units in May 2005. The Company's earnings forecast may vary significantly
during the year due to, among other things,  changing  energy market  conditions
and weather.

"As we enter the summer, we are  well-prepared for the cooling season,  with the
annual  maintenance of our generation  units  virtually  completed.  Our prudent
hedging  strategy for the electric  business is in process,  as we lock in spark
spreads,  reducing our exposure and risk to the short-term  fluctuations  of the
energy  markets,"  said Mr.  Catell.  "We  continue  to focus on  executing  our
strategy to grow our core businesses.  Our 2005 core earnings growth of 4% to 5%
and our  dividend  of $1.82 per share,  driven by our low risk  business  model,
continue to underpin the sustainable value of KeySpan to our shareholders."

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Investors  are  invited to listen to the  KeySpan  Corporation  2005 1st Quarter
Earnings Conference Call on:

Friday, April 29, 2005, at 10:30 AM (EST)

Live Dial-In Number: 888-552-7850
International Dial Number: (706) 645-9166

Replay will begin two hours after completion of the call until 5/5/05 Replay
Number: 800-642-1687
International Replay Number: (706) 645-9291

Audio webcast available at http://investor.keyspanenergy.com

A member of the Standard & Poor's 500 Index,  KeySpan Corporation  (NYSE:KSE) is
the fifth  largest  distributor  of  natural  gas in the  United  States and the
largest  in the  Northeast,  operating  regulated  gas  utilities  in New  York,
Massachusetts,  and New  Hampshire  that  serve  2.6  million  customers.  These
customer-focused businesses are complemented by a portfolio of service companies
that  offer  energy-related  products,  services,  and  solutions  to homes  and
businesses.  KeySpan is also the largest  electric  generator in New York State,
with approximately 6,650 megawatts of generating capacity that provides power to
1.1 million  customers of the Long Island Power Authority  (LIPA) on Long Island
and supplies approximately 25 percent of New York City's capacity needs. KeySpan
also operates  LIPA's  transmission  and  distribution  system under contract to
LIPA. In addition to these assets, KeySpan has strategic investments in pipeline
transportation,  distribution, storage, and production. KeySpan has headquarters
in Brooklyn, New England, and Long Island. For more information, visit KeySpan's
web site at www.keyspanenergy.com.


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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