Exhibit 99.1


                        KeySpan Announces 2003 Guidance
  -- Growth in Major Business Segments to Offset Increase in Pension Expense --
               -- Company Also Reaffirms 2002 Earnings Guidance --

Brooklyn,  New  York,  December  12,  2002 -  KeySpan  Corporation  (NYSE:  KSE)
announced  today that it forecasts  2003  consolidated  earnings in the range of
$2.65 to $2.80 per share,  primarily  driven by continued  strong  contributions
from its  core  businesses.  The 2003  projection  is a modest  increase  to the
Company's  2002  forecasted  earnings  level,  despite the impact of incremental
non-cash Pension and OPEB expense of $0.20 to $0.30 per share.

"The  effective  execution of our  strategy is the key to  KeySpan's  consistent
earnings,"  said Robert B. Catell,  Chairman and Chief  Executive  Officer.  "We
continue  to  capitalize  on  growth   opportunities  in  our  region  and  have
implemented  enhanced cost containment and capital  efficiency  initiatives.  We
expect 6% growth from our core businesses and strong earnings contributions from
our energy  investments  resulting in an increase in 2003  earnings  despite the
impact of higher  pension  expenses.  In  addition,  in 2003 we are  forecasting
significant growth in operating cash flows."

Core Business Drivers

The Gas  Distribution  business  continues  to benefit  from a record  number of
conversions  across its  territories.  KeySpan is expecting to add more than $60
million in new gross  profit  margin in both 2002 and 2003 as a result of 50,000
gas  installations per year. In 2003, the Company expects to achieve this growth
target while reducing Gas Distribution capital expenditures by approximately $50
million.

Electric   Services  is  expected  to  continue  to  provide  a  solid  earnings
contribution  as a result of its mix of  contractual  electric  revenues and its
location in the electric  capacity-constrained New York City load pocket. During
2003,  KeySpan  will  benefit  from a full  year of  contributions  from the 160
megawatts of new  generation  installed  on Long Island in 2002.  The Company is
progressing  on its  construction  of a 250  megawatt  expansion  project at the
Ravenswood  facility  in New York City,  which is expected to be on-line in late
2003,  and also has proposed a new 250 megawatt  plant in Melville,  Long Island
which could be completed by 2005.

The Company  has  implemented  numerous  operational  refinements  in its Energy
Services business in 2002. Energy Services is forecast to achieve  profitability
in 2003 by  organically  growing  earnings in both the Home Energy  Services and
Business Solutions units.


Energy Investments

The Company's  Exploration and Production business is also projected to continue
its strong earnings  contribution in 2003, primarily driven by the favorable gas
commodity price environment.  The exploration and production business has hedged
approximately 65% of 2003 production,  at an approximate  weighted average floor
price of $3.40 per  MMBtu  and a  weighted  average  ceiling  price of $4.55 per
MMBtu.





During  2002,  the  Company  made  progress in  strengthening  its focus on core
operations, by divesting its barge business and a portion of its exploration and
production joint venture, and it continues to assess potential opportunities for
monetization of its remaining non-core assets.

Financial

The Company, also has reaffirmed both its prior forecast of earnings of $2.60 to
$2.75 per share for 2002, and its commitment to an annual  dividend of $1.78 per
share,  which  currently  provides a yield of  approximately  5%. For 2003,  the
Company  forecasts  earnings  of $2.65 to $2.80  per  share;  earnings  from non
Exploration  and  Production  operations  are  forecast to be $2.30 to $2.35 per
share, including the impact of the incremental pension expenses discussed above.
Earnings from  Exploration  and Production are forecast to be $0.35 to $0.45 per
share.

Mr. Catell concluded, "Our strategy is focused on providing excellent service to
our customers  within our core  businesses.  We will optimize the use of capital
while  continuing  to grow our gas business and install new electric  generating
plants.  We are financially  well positioned with predictable  revenues,  stable
earnings and cash flows, a strong balance sheet, and a solid dividend."

The following are the key assumptions employed in developing KeySpan's 2003
forecast:

     Gas

     o    $61 Million in New Gas Gross Profit Margin Added

     o    $50 Million Reduction in Gas Capital Expenditures

     Electric

     o    $20 to $25 per Megawatt-hour Average Ravenswood `Peak Spark Spread'

     o    $90 to $95 per / Kilowatt-year  Average  Ravenswood  Capacity  Payment

     Exploration and Production

     o    $3.25 to $4.00 per MMBtu NYMEX Gas Price

     Corporate

     o    $0.20 to $0.30 per Share in Incremental Pension & OPEB Expense

     o    All Other O& M Expense Increases Expected Offset by Cost Savings

Company Presentation and Webcast

KeySpan's Management team will conduct presentations on Thursday, December 12,
2002 in New York; and on Monday, December 16, 2002, 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:

Thursday, December 12, 2002
8:30 am (EST)
KeySpan's Website: http://investor.keyspanenergy.com
                   ---------------------------------

_______________________________________________________________________________

A member of the Standard & Poor's 500 Index,  KeySpan Corporation (NYSE: KSE) is
the largest  distributor of natural gas in the  Northeast,  with 2.5 million gas
customers  and  approximately  12,000  employees.  KeySpan  is also the  largest
investor-owned  electric  generator in New York State and operates Long Island's
electric  system under contract with the Long Island Power Authority for its 1.1
million  customers.  With  headquarters  in  Brooklyn,  Boston and Long  Island,
KeySpan also manages a dynamic  portfolio of service  companies.  They  include:
KeySpan Energy Delivery,  the group of regulated natural gas utilities;  KeySpan
Home Energy Services,  a group of energy product,  repair and services companies
for residential and small commercial  business  customers;  and KeySpan Business
Solutions, a full-service group of energy product, repair and services companies
for  larger  business  customers.  KeySpan  also has  strategic  investments  in
natural-gas exploration and production,  pipeline  transportation,  distribution
and storage,  and fiber-optic  cable. For more information,  visit KeySpan's web
site at: http://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   forecast   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.