FILED BY KERR-MCGEE CORPORATION
                                                  PURSUANT TO RULE 425 UNDER THE
                                         SECURITIES ACT OF 1933 AND DEEMED FILED
                                               PURSUANT TO RULE 14A-12 UNDER THE
                                                 SECURITIES EXCHANGE ACT OF 1934

                                      SUBJECT COMPANY:  WESTPORT RESOURCES CORP.
                                          SUBJECT COMPANY SEC FILE NO. 001-14256





The merger  agreement  for  Kerr-McGee  Corporation's  acquisition  of  Westport
Resources  Corporation,  along with voting agreements and a registration  rights
agreement related to the merger agreement,  were filed by Kerr-McGee Corporation
under  cover of Form 8-K  today  and are  incorporated  by  reference  into this
filing.





                          IMPORTANT LEGAL INFORMATION

THE  MERGER  AGREEMENT  AND  RELATED  AGREEMENTS  ARE NOT AN  OFFER  TO SELL THE
SECURITIES OF KERR-MCGEE  CORPORATION  AND IT IS NOT  SOLICITING AN OFFER TO BUY
THESE SECURITIES.

INVESTOR   AND   SECURITY   HOLDERS   ARE   URGED  TO  READ  THE   JOINT   PROXY
STATEMENT/PROSPECTUS   REGARDING  THE  PROPOSED   TRANSACTION  WHEN  IT  BECOMES
AVAILABLE  BECAUSE  IT WILL  CONTAIN  IMPORTANT  INFORMATION.  The  Joint  Proxy
Statement/Prospectus  will be  filed  with  the  U.S.  Securities  and  Exchange
Commission (SEC) by Kerr-McGee  Corporation and Westport  Resources  Corporation
Investors  and  security  holders  may  obtain a free  copy of the  Joint  Proxy
Statement/Prospectus  when it becomes  available  and other  documents  filed or
furnished by Kerr-McGee  Corporation or Westport Resources  Corporation with the
SEC at the SEC's website,  www.sec.gov. The Joint Proxy Statement/Prospectus and
other  documents  filed or  furnished  by  Kerr-McGee  Corporation  or  Westport
Resources  Corporation  may also be obtained  for free by directing a request to
Kerr-McGee  Corporation,  Attn:  Corporate Secretary,  P.O. Box 25861,  Oklahoma
City,  Oklahoma  73125 or to  Westport  Resources  Corporation,  Attn:  Investor
Relations, 1670 Broadway, Suite 2800, Denver, Colorado 80202.

Kerr-McGee,  Westport Resources and their respective  directors and officers may
be deemed to be participants in the  solicitation of proxies with respect to the
transactions  contemplated  by  the  merger  agreement.   Information  regarding
Kerr-McGee's  directors and officers is available in the Proxy Statement for its
2004 Annual Meeting of Stockholders,  filed March 26, 2004 with the SEC, and its
Annual  Report on Form  10-K,  filed  March 12,  2004 with the SEC.  Information
regarding Westport  Resources'  directors and officers is available in the Proxy
Statement for its 2003 Annual Meeting of Stockholders, filed April 21, 2003 with
the SEC. Other  information  about the participants in the solicitation  will be
set forth in the Joint Proxy  Statement/Prospectus  and other relevant materials
to be filed with the SEC.

Safe Harbor Language on Forward Looking Statements:

(Statements  in the  merger  agreement  and  related  agreements  regarding  the
company's or management's intentions, beliefs or expectations, or that otherwise
speak to future events, including resource estimates, production rate estimates,
development schedule and cost estimates, are "forward-looking statements" within
the meaning of the U.S. Private Securities  Litigation Reform Act of 1995. These
forward-looking  statements include those statements preceded by, followed by or
that  otherwise   include  the  words  "believes,"   "expects,"   "anticipates,"
"intends,"   "estimates,"   "projects,"  "target,"  "budget,"  "goal,"  "plans,"
"objective,"  "outlook,"  "should," or similar  words.  These  "forward-looking"
statements  also  include  statements  relating to (1) the impact the  companies
expect the proposed  transaction  to have on the combined  entity's  operations,
financial  condition,  and financial  results,  (2) the companies'  expectations
about their ability to successfully  integrate the combined businesses,  (3) the
amount of cost savings and overall operational efficiencies the companies expect
to  realize  as a result of the  proposed  transaction,  (4) when the  companies
expect  to  close  the  proposed  transaction,   (5)  anticipated  drilling  and
development  opportunities  and (6) the ability of the  companies  to meet their
stated  financial  goals.  In  addition,   any  statements   regarding  possible
commerciality,  development plans,  capacity expansions,  drilling of new wells,
ultimate recoverability of reserves,  future production rates, future cash flows
and changes in any of the foregoing are forward-looking statements.

Matters discussed in these statements involve risks and uncertainties  which may
cause results to differ materially from those set forth in these statements. The
following factors, among others, could cause actual results to differ from those
set for in these forward-looking  statements: the ability to obtain governmental
approvals  of the merger on the  proposed  terms and  schedule;  the  failure of
Kerr-McGee or Westport  Resources  stockholders to approve the merger;  the risk
that the businesses will not be integrated successfully;  the risk that the cost
savings and any synergies  from the merger may not be fully realized or may take
longer to realize  than  expected;  disruption  from the  merger  making it more
difficult to maintain relationships with customers,  employees or suppliers; the
accuracy of the assumptions that underlie the statements, the success of the oil
and gas exploration and production  program,  the price of oil and gas, drilling
risks,  uncertainties  in  interpreting  engineering  data,  demand for consumer
products for which Kerr-McGee's oil and gas business supplies raw materials, the
financial resources of competitors, changes in laws and regulations, the ability
to respond to challenges in international markets, including changes in currency
exchange  rates,  political  or economic  conditions  in areas where  Kerr-McGee
operates, trade and regulatory matters,  general economic conditions,  and other
factors and risks identified in the Risk Factors sections of Kerr-McGee's Annual
Report on Form 10-K and Westport  Resources'  Annual Report on Form 10-K as well
as other of their SEC filings.