Exhibit 99.1

                                                                        NEWS
- --------------------------------------------------------------------------------

Contacts: Investors                                          Media Relations
          George Laskaris                                    Ed Yutkowitz
          718.403.2526                                       718.403.2523



                KeySpan to Sell its Remaining Ownership Interest
                       in The Houston Exploration Company


Brooklyn,  NY - November  19, 2004 - KeySpan  Corporation  (NYSE:KSE)  announced
today that it expects to completely exit its ownership interest in its affiliate
company, The Houston Exploration Company (NYSE: THX). KeySpan has agreed to sell
its remaining  ownership  interest of approximately 6.6 million shares of common
stock in Houston  Exploration through Morgan Stanley at a price to the public of
$56.25 per share.  The sale will generate  proceeds to KeySpan of  approximately
$369  million.  Following  this  transaction,  KeySpan  will no longer  have any
ownership interest in Houston Exploration.

Morgan Stanley will be the sole underwriter for this transaction.

This press release shall not constitute an offer to sell or the  solicitation of
an offer to buy nor shall there be any sale of these  securities in any state in
which such offer,  solicitation  or sale would be unlawful prior to registration
or qualification  under the securities law of any state.  Investors may obtain a
copy of the  prospectus  relating to the  offering  when  available  from Morgan
Stanley.


- -------------------------------------------------------------------------------


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  6,400  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 our investment in natural
gas properties  when natural gas prices are depressed or if we have  significant
downward  revisions  in our  estimated  proved gas  reserves;  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.








                                       2