Exhibit T3A-13.

                                    DELAWARE

                                 THE FIRST STATE

         I, HARRIET SMITH WINDSOR, SECRETARY OF STATE OF THE STATE OF DELAWARE,
DO HEREBY CERTIFY THE ATTACHED ARE TRUE AND CORRECT COPIES OF ALL DOCUMENTS ON
FILE OF "COVANTA ENERGY WEST, INC." AS RECEIVED AND FILED IN THIS OFFICE.

         THE FOLLOWING DOCUMENTS HAVE BEEN CERTIFIED:

         CERTIFICATE OF INCORPORATION, FILED THE TWENTY-FIFTH DAY OF FEBRUARY,
A.D. 1999, AT 9 O'CLOCK A.M.

         CERTIFICATE OF AMENDMENT, CHANGING ITS NAME FROM "OGDEN ENERGY WEST,
INC." TO "COVANTA ENERGY WEST, INC.", FILED THE FOURTEENTH DAY OF MARCH, A.D.
2001, AT 9 O'CLOCK A.M.

         AND I DO HEREBY FURTHER CERTIFY THAT THE AFORESAID CERTIFICATES ARE THE
ONLY CERTIFICATES ON RECORD OF THE AFORESAID CORPORATION.

                                                Harriet Smith Windsor
                                                --------------------------------
                                                Harriet Smith Windsor, Secretary
                                                of State
3010023  8100H               (SEAL)             AUTHENTICATION: 2949959
040132986                                       DATE: 02-24-04

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                           CERTIFICATE OF INCORPORATION

                                       OF

                             OGDEN ENERGY WEST, INC.

                  The undersigned, a natural person, for the purpose of
organizing a corporation for conducting the business and promoting the purposes
hereinafter stated, under the provisions and subject to the requirements of the
laws of the State of Delaware (particularly Chapter 1, Title 8 of the Delaware
Code and the acts amendatory thereof and supplemental thereto, and known,
identified, and referred to as the "General Corporation Law of the State of
Delaware"), hereby certifies that:

                  FIRST: The name of the corporation (hereinafter called the
"corporation) is Ogden Energy West, Inc.

                  SECOND: the address, including street, number, city, and
county, of the registered office of the corporation in the State of Delaware is
1013 Centre Road, City of Wilmington, Delaware, County of New Castle, 19805; and
the name of the registered agent of the corporation in the State of Delaware at
such address is Corporation Service Company.

                  THIRD: The purpose of the corporation is to engage in any
lawful act or activity for which corporations may be organized under the General
Corporation Law of the State of Delaware.

                  FOURTH: The total number of shares of stock which the
corporation shall have authority to issue is One Hundred (100). The par value of
each of such shares is One Dollar and No Cents ($1.00). All such shares are of
one class and are shares of Common Stock. Each outstanding share of which, will
be entitled to one vote.

                  FIFTH: The name and the mailing address of the incorporator
are as follows:



   NAME                                     MAILING ADDRESS
   ----                                     ---------------
                                      
Jeffrey R. Horowitz                      40 Lane Road
                                         Fairfield, New Jersey 07007


                  SIXTH:  The corporation is to have perpetual existence.

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                  SEVENTH: The personal liability of the directors of the
corporation is hereby eliminated to the fullest extent permitted by the
provisions of paragraph (7) of subsection (b) of Section 102 of the General
Corporation Law of the State of Delaware, as the same may be amended and
supplemented.

                  EIGHTH: From time to time any of the provisions of this
certificate of Incorporation may be amended, altered, or repealed, and other
provisions authorized by the laws of the State of Delaware at the time in force
may be added or inserted in the manner and at the time prescribed by said laws
and all rights at any time conferred upon the stockholders of the corporation by
this certificate of incorporation are granted subject to the provisions of this
Article Eighth.

Signed on February 26, 1999

                                            /s/  Jeffrey R. Horowitz
                                            ------------------------------------
                                                 Incorporator
                                                 Jeffrey R. Horowitz

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            CERTIFICATE OF AMENDMENT OP CERTIFICATE OF INCORPORATION

                                       OF

                             OGDEN ENERGY WEST, INC.

It is hereby certified that:

                  1.       The name of the corporation (hereinafter the
"corporation") is OGDEN ENERGY WEST, INC.

                  2.       The certificate of incorporation of the corporation
is hereby amended by striking out Article One thereof and by substituting in
lieu of said Article the following new Article:

                  Article One: The name of the corporation (hereinafter called
                  the "corporation") is COVANTA ENERGY WEST, INC.

                  3.       The amendment of the certificate of incorporation
herein certified has been duly adopted in accordance with the provision of
Section 242 and 228 of the General Corporation Law of the State of Delaware.

                  IN WITNESS WHEREOF, I have duly executed this certificate of
amendment this 14th day of March _____, 2001.

                              /s/ Patricia Collins
                             ---------------------------
                             Name: Patricia Collins
                             Title: Asst. Secretary

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