Document:

<PAGE>   1
                                                                     Exhibit 4.2

                 AMENDMENT NO. 1 TO SIXTH SUPPLEMENTAL INDENTURE

This AMENDMENT NO. 1 TO THE SIXTH SUPPLEMENTAL INDENTURE, dated as of June 29,
2001 (this "AMENDMENT NO. 1 TO THE SIXTH SUPPLEMENTAL INDENTURE"), among ALLIED
WASTE NORTH AMERICA, INC., a corporation duly organized and existing under the
laws of the State of Delaware (the "COMPANY"), having its principal office at
15880 North Greenway-Hayden Loop, Suite 100, Scottsdale, Arizona 85260, each of
the GUARANTORS signatory hereto (the "GUARANTORS") and U.S. BANK TRUST NATIONAL
ASSOCIATION, a national banking association, as Trustee (the "TRUSTEE").

                                   WITNESSETH:

WHEREAS, the Company, the Guarantors and the Trustee executed and delivered an
Indenture, dated as of December 23, 1998 (the "INDENTURE"), to provide for the
issuance by the Company from time to time of debt securities evidencing its
indebtedness;

WHEREAS, pursuant to Board Resolution (the "RESOLUTIONS"), the Company has
authorized the issuance of $600,000,000 of its 8-7/8% Series A Senior Secured
Notes Due 2008 (the "SERIES A NOTES") and $600,000,000 of its 8-7/8% Series B
Senior Notes Due 2008 (the "SERIES B NOTES," and together with the Series A
Notes, the "NOTES"); and

WHEREAS, the Company, the Guarantors and Trustee entered into a Sixth
Supplemental Indenture to the Indenture, dated as of January 30, 2001 (the
"SIXTH SUPPLEMENTAL INDENTURE") pursuant to which the Company has issued the
Series A Notes and intends to issue the Series B Notes;

WHEREAS, the Company desires to change the title of the Series B Notes from
"8-7/8% Series B Senior Secured Notes Due 2008" to "8-7/8% Series B Senior Notes
Due 2008" but without changing any other terms of the Series B Notes, and each
of the Guarantors and the Trustee have consented to this change and desire to
execute this Amendment No. 1 to the Sixth Supplemental Indenture to do so;

                                   ARTICLE I.
                             TITLE OF SERIES B NOTES

Section 1.01  TITLE OF THE SERIES B NOTES.

         (a) All references to the title of the Series B Notes contained in the
Sixth Supplemental Indenture are hereby amended to make the title of the Series
B Notes "8-7/8% Series B Senior Notes Due 2008."

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         (b) This Amendment No. 1 to the Sixth Supplemental Indenture shall not
change any other term of the Series B Notes, the Indenture or the Sixth
Supplemental Indenture.

         (c) A form of the Series B Notes is attached to this Amendment No. 1 to
the Sixth Supplemental Indenture as Annex A hereto.

                                   ARTICLE II.
                                  MISCELLANEOUS

Section 2.01  DEFINITIONS.

Capitalized terms used but not defined in this Amendment No. 1 to the Sixth
Supplemental Indenture shall have the meanings ascribed thereto in the
Indenture.

Section 2.02  CONFIRMATION OF INDENTURE.

The Sixth Supplemental Indenture, as modified, supplemented and superseded by
this Amendment No. 1 to the Sixth Supplemental Indenture, is in all respects
ratified and confirmed, and the Indenture, the Sixth Supplemental Indenture and
this Amendment No. 1 to the Sixth Supplemental Indenture shall be read, taken
and construed as one and the same instrument. (References herein to the
Indenture shall be deemed to be to the Indenture, as modified, supplemented and
superseded by the Sixth Supplemental Indenture and this Amendment No. 1 to the
Sixth Supplemental Indenture).

Section 2.03  GOVERNING LAW.

This Amendment No. 1 to the Sixth Supplemental Indenture shall be governed by
and construed in accordance with the laws of the State of New York without
giving effect to any provisions thereof relating to conflicts of law.

Section 2.03  SEPARABILITY.

In case any provision in this Amendment No. 1 to the Sixth Supplemental
Indenture shall for any reason be held to be invalid, illegal or unenforceable,
the validity, legality and enforceability of the remaining provisions shall not
in any way be affected or impaired thereby.

Section 2.04  COUNTERPARTS.

This Amendment No. 1 to the Sixth Supplemental Indenture may be executed in any
number of counterparts each of which shall be an original, but such counterparts
shall together constitute but one and the same instrument.

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IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 1 to the
Sixth Supplemental Indenture to be duly executed, and their respective corporate
seals to be hereunto affixed and attested, all as of the day and year first
above written.

                                  ALLIED WASTE NORTH AMERICA, INC.

                                  By:  /s/ Thomas P. Martin
                                     -------------------------------------------
                                       Name:  Thomas P. Martin
                                       Title:    Treasurer

Attest:

/s/ Jenny Apker
---------------------------------
Name:  Jenny Apker
Title:   Assistant Secretary

                                  ALLIED WASTE INDUSTRIES, INC.

                                  for purposes of Article 15 of the Indenture
                                  and as Guarantor of the Securities and as
                                  Guarantor of the obligations of the
                                  Subsidiary Guarantors under the Subsidiary
                                  Guarantees

                                  By: /s/ Thomas P. Martin
                                     -------------------------------------------
                                       Name:  Thomas P. Martin
                                       Title:    Treasurer

Attest:

/s/ Jenny Apker
---------------------------------
Name:  Jenny Apker
Title:   Assistant Secretary

                                       3
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                                  Each of the Subsidiary Guarantors Listed on
                                  Schedule I hereto, as Guarantor of the
                                  Securities

                                  By*: /s/ Thomas P. Martin
                                      ------------------------------------------
                                       Name:  Thomas P. Martin
                                       Title:    Treasurer

Attest*:

/s/ Jenny Apker
---------------------
Name:  Jenny Apker
Title:    Assistant Secretary

                                  U.S. BANK TRUST NATIONAL ASSOCIATION

                                  By: /s/ Richard H. Prokosch
                                     -------------------------------------------
                                       Name:  Richard H. Prokosch
                                       Title:   Vice President

---------------------------------
* Signing as duly authorized officer for each such Subsidiary Guarantor.

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                                                                         ANNEX A
                                 [Face of Note]
                                                         CUSIP/CINS ____________

                      8-7/8% SERIES B SENIOR NOTES DUE 2008

No. ______                                                         $____________

                        ALLIED WASTE NORTH AMERICA, INC.

promises to pay to Cede & Co.,

or registered assigns,

the principal sum of
                     __________________________________________________________

Dollars on April 1, 2008.

Interest Payment Dates:  April 1 and October 1, commencing October 1, 2001

Record Dates:  March 15 and September 15

Dated:  ________, 2001

                                ALLIED WASTE NORTH AMERICA, INC.

                                By:
                                   ____________________________________________
                                     Name:
                                     Title:

This is one of the Notes referred to in the
within-mentioned Indenture:

U.S. BANK TRUST NATIONAL ASSOCIATION,
as Trustee

By:
   ______________________________________
                Authorized Signatory

                                       5
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                                 [Back of Note]

                      8-7/8% SERIES B SENIOR NOTES DUE 2008

[Insert the Global Note Legend, if applicable pursuant to the provisions of the
Indenture]

[Insert the Regulation S Note Legend, if applicable, pursuant to the provision
of the Indenture]

[Insert the Private Placement Legend, if applicable, pursuant to the provision
of the Indenture]

Capitalized terms used herein shall have the meanings assigned to them in the
Indenture referred to below unless otherwise indicated.

         1. INTEREST. Allied Waste North America, Inc., a Delaware corporation
(the "COMPANY"), promises to pay interest on the principal amount of this Note
at 8-7/8% per annum from the date hereof until maturity and shall pay the
Special Interest, if any, payable pursuant to Section 5 of the Registration
Rights Agreement referred to below. The Company shall pay interest and Special
Interest semi-annually in arrears on April 1 and October 1 of each year
beginning October 1, 2001, or if any such day is not a Business Day, on the next
succeeding Business Day (each an "Interest Payment Date"). Interest on the Notes
shall accrue from the most recent date to which interest has been paid or, if no
interest has been paid, from the date of issuance; provided that if there is no
existing Default in the payment of interest, and if this Note is authenticated
between a record date referred to on the face hereof and the next succeeding
Interest Payment Date, interest shall accrue from such next succeeding Interest
Payment Date; provided, further, that the first Interest Payment Date shall be
October 1, 2001. The Company shall pay interest (including post-petition
interest in any proceeding under any Bankruptcy Law) on overdue principal and
premium, if any, from time to time on demand at a rate that is 2% per annum in
excess of the rate then in effect; it shall pay interest (including
post-petition interest in any proceeding under any Bankruptcy Law) on overdue
installments of interest and Special Interest, if any, from time to time on
demand at the same rate to the extent lawful. Interest shall be computed on the
basis of a 360 day year of twelve 30 day months.

         2. METHOD OF PAYMENT. The Company shall pay interest on the Notes
(except defaulted interest) and Special Interest, if any, to the Persons who are
registered Holders of Notes at the close of business on the March 15 or
September 15 next preceding the Interest Payment Date, even if such Notes are
canceled after such record date and on or before such Interest Payment Date,
except as provided in Section 3.7(b) of the Indenture with respect to defaulted
interest. The Notes shall be payable as to principal, premium and Special
Interest, if any, and interest at the office or agency of the Company maintained
for such purpose within or without the City and State of New York, or, at the
option of the Company, payment of interest and Special Interest, if any, may be
made by check mailed to the Holders at their addresses set forth in the register
of Holders, and provided that payment by wire transfer of immediately available
funds shall be required with respect to principal of and interest, premium and
Special Interest on, all Global Notes and all other Notes the Holders of which
shall have provided wire transfer instructions to the Company or the Paying
Agent at least 10 Business Days prior to the

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applicable payment date. Such payment shall be in such coin or currency of the
United States of America as at the time of payment is legal tender for payment
of public and private debts.

         3. PAYING AGENT AND REGISTRAR. Initially, U.S. Bank Trust National
Association, the Trustee under the Indenture, shall act as Paying Agent and
Registrar. The Company may change any Paying Agent or Registrar without notice
to any Holder. The Company or any of its Subsidiaries may act in any such
capacity.

         4. INDENTURE. The Company issued the Notes under an Indenture dated as
of December 23, 1998, as amended by the Sixth Supplemental Indenture dated as of
January 30, 2001 (together, the "INDENTURE"), each among the Company, the
Guarantors and the Trustee. The terms of the Notes include those stated in the
Indenture and those made part of the Indenture by reference to the Trust
Indenture Act of 1939, as amended (15 U.S. Code Sections 77aaa 77bbbb).
The Notes are subject to all such terms, and Holders are referred to the
Indenture and such Act for a statement of such terms. To the extent any
provision of this Note conflicts with the express provisions of the Indenture,
the provisions of the Indenture shall govern and be controlling.

         5. OPTIONAL REDEMPTION.

                  (a) Except as set forth in subparagraph (b) and (c) of this
         Paragraph 5, the Company shall not have the option to redeem the Notes
         prior to the final maturity of such Notes.

                  (b) The Notes shall be subject to redemption at the option of
         the Company, in whole or in part, at any time, upon not less than 30
         nor more than 60 days' notice mailed to each Holder of Notes to be
         redeemed at such Holder's address appearing in the applicable Note
         Register, in amounts of $1,000 or an integral multiple of $1,000, at a
         Redemption Price equal to the greater of (i) 100% of their principal
         amount or (ii) the sum of the present values of the remaining scheduled
         payments of principal and interest thereon discounted to maturity on a
         semi-annual basis (assuming a 360-day year consisting of twelve 30-day
         months) at the Treasury Yield plus 50 basis points, plus in each case
         accrued but unpaid interest (including Special Interest) to but
         excluding the Redemption Date (subject to the right of Holders of
         record on the relevant Regular Record Date to receive interest due on
         an Interest Payment Date that is on or prior to the Redemption Date).

                  (c) At any time, or from time to time, prior to April 1, 2004,
         up to 33 1/3% in aggregate principal amount of the Notes originally
         issued under the Indenture shall be redeemable, at the option of the
         Company, from the net proceeds of one or more Public Offerings of
         Capital Stock (other than Redeemable Interests) of Allied, at a
         Redemption Price equal to 108.875% of the principal amount thereof,
         together with accrued but unpaid interest (including Special Interest)
         to the Redemption Date (subject to the right of Holders of record on
         the relevant Regular Record Date to receive interest due on an Interest
         Payment Date that is on or prior to the Redemption Date); provided that
         the notice of redemption with respect to any such redemption is mailed
         within 30 days following the closing of the corresponding Public
         Offering.

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         6. MANDATORY REDEMPTION. Except as set forth in paragraph 7 below, the
Company shall not be required to make mandatory redemption payments with respect
to the Notes.

         7. REPURCHASE AT OPTION OF HOLDER. The Indenture provides that, subject
to certain conditions, if (i) certain Net Available Proceeds are available to
the Company as a result of Asset Dispositions or (ii) a Change of Control
occurs, the Company shall be required to make an Offer to Purchase for all or a
specified portion of the Securities.

         8. NOTICE OF REDEMPTION. Notice of redemption shall be mailed no less
than 30 days but no more than 60 days before the redemption date to each Holder
whose Notes are to be redeemed at its registered address. Notes in denominations
larger than $1,000 may be redeemed in part but only in whole multiples of
$1,000, unless all of the Notes held by a Holder are to be redeemed. On and
after the redemption date interest ceases to accrue on Notes or portions thereof
called for redemption.

         9. DENOMINATIONS, TRANSFER, EXCHANGE. The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Notes may be registered and Notes may be exchanged as provided in
the Indenture. The Registrar and the Trustee may require a Holder, among other
things, to furnish appropriate endorsements and transfer documents and the
Company may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture. The Company need not exchange or register the
transfer of any Note or portion of a Note selected for redemption, except for
the unredeemed portion of any Note being redeemed in part. Also, the Company
need not exchange or register the transfer of any Notes for a period of 15 days
before a selection of Notes to be redeemed or during the period between a record
date and the corresponding Interest Payment Date.

         10. PERSONS DEEMED OWNERS. The registered Holder of a Note may be
treated as its owner for all purposes.

         11. AMENDMENT, SUPPLEMENT AND WAIVER. The Indenture permits, with
certain exceptions as therein provided, the amendment thereof and the
modification of the rights and obligations of the Company and the Guarantors and
the rights of the Holders of the Securities under the Indenture at any time by
the Company, the Guarantors and the Trustee with the consent of the Holders of a
majority in aggregate principal amount of the Notes at the time.

         12. DEFAULTS AND REMEDIES. Events of Default include: (i) default for
30 days in the payment when due of interest on the Notes; (ii) default in
payment when due of principal of or premium, if any, on the Notes when the same
becomes due and payable at maturity, upon redemption (including in connection
with an Offer to Purchase) or otherwise, (iii) failure by the Company to comply
with subsections 12(a) or 12(b) of Section 1.01 of the Indenture or Article 7 of
the Indenture (as superseded by subsection 13 of Section 1.01 of the Sixth
Supplemental Indenture); (iv) failure by the Company for 60 days after notice to
the Company or the Holders of at least 10% in principal amount of the Notes
(including Additional Notes, if any) then outstanding voting as a single class
to comply with certain other agreements in the Indenture and the Notes; (v)
default under certain other agreements relating to Debt of the Company which
default results in the acceleration of such Debt prior to its express maturity;
(vi) certain final

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judgments for the payment of money that remain undischarged for a period of 60
days; and (vii) certain events of bankruptcy or insolvency with respect to the
Company or any of its Material Subsidiaries. If any Event of Default (other than
an Event of Default of the type described in clause (vii) above) occurs and is
continuing, the Trustee or the Holders of at least 25% in principal amount of
the then outstanding Notes may declare all the Notes to be due and payable.
Notwithstanding the foregoing, in the case of an Event of Default arising from
certain events of bankruptcy or insolvency, all outstanding Notes shall become
due and payable without further action or notice; provided, however, that after
such acceleration, but before a judgment or decree based on acceleration, the
Holders of a majority in aggregate principal amount of Outstanding Notes of such
issue may, under certain circumstances, rescind and annul such acceleration if
all Events of Default, other than the non-payment of accelerated principal, have
been cured or waived as provided in the Indenture. Holders may not enforce the
Indenture or the Notes except as provided in the Indenture. Subject to certain
limitations, Holders of a majority in principal amount of the then outstanding
Notes may direct the Trustee in its exercise of any trust or power. The Trustee
may withhold from Holders of the Notes notice of any continuing Default or Event
of Default (except a Default or Event of Default relating to the payment of
principal or interest) if it determines that withholding notice is in their
interest. The Holders of a majority in aggregate principal amount of the Notes
then outstanding by notice to the Trustee may on behalf of the Holders of all of
the Notes waive any existing Default or Event of Default and its consequences
under the Indenture except a continuing Default or Event of Default in the
payment of interest on, or the principal of, the Notes. The Company is required
to deliver to the Trustee annually a statement regarding compliance with the
Indenture, and the Company is required upon becoming aware of any Default or
Event of Default, to deliver to the Trustee a statement specifying such Default
or Event of Default.

         13. TRUSTEE DEALINGS WITH COMPANY. The Trustee, in its individual or
any other capacity, may make loans to, accept deposits from, and perform
services for the Company or its Affiliates, and may otherwise deal with the
Company or its Affiliates, as if it were not the Trustee.

         14. NO RECOURSE AGAINST OTHERS. A director, officer, employee,
incorporator or stockholder, of the Company, as such, shall not have any
liability for any obligations of the Company under the Notes or the Indenture or
for any claim based on, in respect of, or by reason of, such obligations or
their creation. Each Holder by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for the issuance
of the Notes.

         15. AUTHENTICATION. This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

         16. ABBREVIATIONS. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT
(=tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

         17. ADDITIONAL RIGHTS OF HOLDERS OF RESTRICTED GLOBAL NOTES AND
RESTRICTED DEFINITIVE NOTES. In addition to the rights provided to Holders of
Notes under the Indenture,

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Holders of Restricted Global Notes and Restricted Definitive Notes shall have
all the rights set forth in the Registration Rights Agreement relating to the
Notes dated as of January 30, 2001, among the Company, the Guarantors and the
parties named on the signature pages thereof or, in the case of Additional
Notes, Holders of Restricted Global Notes and Restricted Definitive Notes shall
have the rights set forth in one or more registration rights agreements, if any,
between the Company and the other parties thereto, relating to rights given by
the Company to the purchasers of any Additional Notes (collectively, the
"REGISTRATION RIGHTS AGREEMENT").

         18. CUSIP NUMBERS. Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers
in notices of redemption as a convenience to Holders. No representation is made
as to the accuracy of such numbers either as printed on the Notes or as
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon.

The Company shall furnish to any Holder upon written request and without charge
a copy of the Indenture and/or the Registration Rights Agreement. Requests may
be made to:

ALLIED WASTE NORTH AMERICA, INC.
15880 North Greenway - Hayden Loop, Suite 100
Scottsdale, AZ  85260
Attention:  Treasurer

                                       10<PAGE>   1
                                                                    Exhibit 4.21

                         SEVENTH SUPPLEMENTAL INDENTURE

         SEVENTH SUPPLEMENTAL INDENTURE, dated as of June 29, 2001 (the "SEVENTH
SUPPLEMENTAL INDENTURE") among ALLIED WASTE NORTH AMERICA, INC., a Delaware
corporation (the "COMPANY"), having its principal place of business at 15880
North Greenway-Hayden Loop, Suite 100, Scottsdale, Arizona 85260, and each of
the guarantors signatory hereto (the "GUARANTORS") and U.S. Bank Trust National
Association, as trustee (the "TRUSTEE").

                                   WITNESSETH:

         WHEREAS, the Company, Allied Waste Industries, Inc., the sole
stockholder of the Company ("ALLIED"), the subsidiary guarantors party thereto
and the Trustee executed and delivered an Indenture, dated as of December 23,
1998 (the "INDENTURE"), to provide for the issuance by the Company from time to
time of debt securities evidencing its unsecured indebtedness (the
"SECURITIES");

         WHEREAS, pursuant to resolutions adopted by the Board of Directors of
the Company, the Company issued (i) $300,000,000 aggregate principal amount of
its 7-3/8% Senior Notes due 2004 (the "FIVE-YEAR NOTES") pursuant to a First
Supplemental Indenture, dated as of December 23, 1998, (ii) $600,000,000
aggregate principal amount of its 7-5/8% Senior Notes due 2006 (the "SEVEN-YEAR
NOTES") pursuant to a Second Supplemental Indenture, dated as of December 23,
1998, (iii) $875,000,000 aggregate principal amount of its 7-7/8% Senior Notes
due 2009 (the "TEN-YEAR NOTES") pursuant to a Third Supplemental Indenture,
dated as of December 23, 1998, and (iv) $600,000,000 aggregate principal amount
of its 8-7/8% Senior Notes due 2008 (the "2001 NOTES" and, together with the
Five-Year Notes, the Seven-Year Notes and the Ten-Year Notes, the "NOTES")
pursuant to a Sixth Supplemental Indenture, dated as of January 30, 2001, as
amended on June 29, 2001 (the Indenture, as supplemented by the related
Supplemental Indenture for the applicable series of Notes, the "INDENTURE
SERIES");

         WHEREAS, subsequent to the issuance of the Securities, the Company has
acquired certain other Restricted Subsidiaries identified on Schedule A hereto,
which are required to guarantee the Company's obligations under the Securities
and the Indenture Series in accordance with the terms of the Securities and the
Indenture Series;

         WHEREAS, each of the Restricted Subsidiaries identified on Schedule A
hereto (the "SUBSIDIARY GUARANTORS") has duly authorized the execution and
delivery of this Seventh Supplemental Indenture to provide for the Guarantees
(as defined in the Indenture Series);

<PAGE>   2
         WHEREAS, pursuant to resolutions adopted by the board of directors,
partners or members, as the case may be, of each of the Subsidiary Guarantors,
each of the Subsidiary Guarantors has duly authorized the guarantee of the
Company's obligations under the Securities and the Indenture Series;

         NOW THEREFORE, for and in consideration of the premises, it is mutually
covenanted and agreed, for the equal and proportionate benefit of all Holders of
the Securities or any series thereof, as follows:

                                   ARTICLE ONE
                        DEFINITIONS AND OTHER PROVISIONS
                             OF GENERAL APPLICATION

         SECTION 101. Definitions.

         All capitalized terms used herein without definition shall have the
meanings specified in the Indenture.

         SECTION 102. Provisions of General Application.

         All rules of construction and other provisions of general application
set forth in Article One of the Indenture are hereby incorporated herein by
reference.

         SECTION 103. Effectiveness.

         This Seventh Supplemental Indenture shall become effective upon the
signature of each and all of the parties hereto without any further action.

                                   ARTICLE TWO
                                    GUARANTEE

         SECTION 201. Senior Guarantee.

         Each of Allied and each of the Subsidiary Guarantors hereby jointly and
severally unconditionally guarantees for the benefit of each Holder of a
Security that has been authenticated and delivered by the Trustee, and for the
benefit of the Trustee on behalf of each such Holder, the due and punctual
payment of the principal of, premium, if any, and interest on such Security when
and as the same shall become due and payable, whether at its Stated Maturity or
following acceleration, call for redemption, purchase or otherwise, in each case
in accordance with the terms and conditions of such Security, this Seventh
Supplemental Indenture and the Indenture Series. Each of the Subsidiary
Guarantors

                                      -2-
<PAGE>   3
shall be from the effective date of this Seventh Supplemental Indenture a
"Subsidiary Guarantor" within the meaning and for all purposes of the Indenture.
In addition, Allied hereby guarantees to the extent set forth in the Senior
Guarantee endorsed upon each Security for the benefit of the Holder thereof, the
obligations of each Subsidiary Guarantor thereunder.

                                  ARTICLE THREE
              PARTICULAR REPRESENTATIONS, WARRANTIES AND COVENANTS
                        OF THE COMPANY AND THE GUARANTORS

         SECTION 301. Authority of the Company.

         The Company represents and warrants that it is duly authorized under
the laws of the State of Delaware and all other applicable laws to execute,
deliver and perform this Seventh Supplemental Indenture, and all corporate
action on its part required for the execution, delivery and performance of this
Seventh Supplemental Indenture by the Company has been duly and effectively
taken.

         SECTION 302. Authority of the Guarantors.

         Each Guarantor represents and warrants that it is duly authorized under
the laws of the jurisdiction of its incorporation/organization and all other
applicable laws to execute, deliver and perform this Seventh Supplemental
Indenture, and all corporate or other action on its part required for the
execution, delivery and performance of this Seventh Supplemental Indenture by
such Guarantor has been duly and effectively taken.

         SECTION 303. Truth of Recitals and Statements of the Company.

         The Company represents and warrants that the recitals of fact and
statements contained in this Seventh Supplemental Indenture with respect to it
are true and correct in all material respects, and that the recitals of fact and
statements contained in all certificates and other documents furnished by the
Company in connection herewith will be true and correct in all material
respects.

         SECTION 304. Truth of Recitals and Statements of the Guarantors.

         Each Guarantor represents and warrants that the recitals of fact and
statements contained in this Seventh Supplemental Indenture with respect to it
are true and correct in all material respects, and that the recitals of fact and
statements contained in all certificates and other documents furnished by such
Guarantor in connection herewith will be true and correct in all material
respects.

                                      -3-
<PAGE>   4
                                  ARTICLE FOUR
                             CONCERNING THE TRUSTEE

         SECTION 401. Acceptance of Trusts.

         The Trustee accepts the trusts hereunder and agrees to perform the
same, but only upon the terms and conditions set forth in the Indenture Series
and in this Seventh Supplemental Indenture, to all of which the Company and the
Guarantors agree and the Holders of Securities at any time outstanding by their
acceptance thereof agree.

         SECTION 402. No Responsibility of the Trustee for Recitals, etc.

         The recitals and statements contained in this Seventh Supplemental
Indenture shall be taken as the recitals and statements of the Company and the
Guarantors, and the Trustee assumes no responsibility for the correctness of the
same. The Trustee makes no representations as to the validity or sufficiency of
this Seventh Supplemental Indenture.

                                  ARTICLE FIVE
                            MISCELLANEOUS PROVISIONS

         SECTION 501. Binding Agreement; Assignments.

         Whenever in this Seventh Supplemental Indenture any of the parties
hereto is referred to, such reference shall be deemed to include the successors
and assigns of such party; and all covenants, promises and agreements by or on
behalf of each Guarantor that are contained in this Seventh Supplemental
Indenture shall bind and inure to the benefit of each party hereto and their
respective successors and assigns.

         SECTION 502. Relation to Indenture.

         The provisions of this Seventh Supplemental Indenture shall become
effective immediately upon the execution and delivery hereof. This Seventh
Supplemental Indenture and all the terms and provisions herein contained shall
form a part of the Indenture as fully and with the same effect as if all such
terms and provisions had been set forth in the Indenture and each and every term
and condition contained in the Indenture shall apply to this Seventh
Supplemental Indenture with the same force and effect as if the same were set
forth in full in this Seventh Supplemental Indenture, with such omissions,
variations and modifications thereof as may be appropriate to make each such
term and condition consistent with this Seventh Supplemental Indenture. The
Indenture is hereby ratified and confirmed and shall remain and continue in full
force and

                                      -4-
<PAGE>   5
effect in accordance with the terms and provisions thereof, as supplemented and
amended by this Seventh Supplemental Indenture and the Indenture and this
Seventh Supplemental Indenture shall be read, taken and construed together as
one instrument.

         SECTION 503. Counterparts.

         This Seventh Supplemental Indenture may be executed in several
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one instrument.

                                      -5-
<PAGE>   6
         IN WITNESS WHEREOF, the parties hereto have caused this Seventh
Supplemental Indenture to be duly executed, and their respective corporate seals
to be hereunto affixed and attested, all as of the day and year first above
written.

                    ALLIED WASTE NORTH AMERICA, INC.

                    By: /s/ Thomas P. Martin
                       ----------------------------------------------------
                         Name:  Thomas P. Martin
                         Title: Treasurer

                    ALLIED WASTE INDUSTRIES, INC.

                    for purposes of Article 2 and as Guarantor of the Securities
                    and as Guarantor of the obligations of the Subsidiary
                    Guarantors under the Subsidiary Guarantees

                    By:  /s/ Thomas P. Martin
                       ----------------------------------------------------
                         Name:  Thomas P. Martin
                         Title: Treasurer

                    Each of the Subsidiary Guarantors Listed on Schedule A
                    hereto, as Guarantors of the Securities

                    By:   /s/ Thomas P. Martin
                       ----------------------------------------------------
                         Name:  Thomas P. Martin
                         Title: Treasurer

                    U.S. BANK TRUST NATIONAL ASSOCIATION, as Trustee

                    By:   /s/ Richard H. Prokosch
                       ----------------------------------------------------
                         Name:  Richard H. Prokosch
                         Title: Vice President

                                      -6-
<PAGE>   7
                                   SCHEDULE A

<TABLE>
<CAPTION>
NAME OF SUBSIDIARY GUARANTOR                          STATE OF ORGANIZATION
<S>                                                   <C>
BFI Transfer Systems of Alabama, LLC                  Delaware
BFI Transfer Systems of DC, LLC                       Delaware
BFI Transfer Systems of Georgia, LLC                  Delaware
BFI Transfer Systems of Massachusetts, LLC            Massachusetts
BFI Transfer Systems of Maryland, LLC                 Delaware
BFI Transfer Systems of Mississippi, LLC              Delaware
BFI Transfer Systems of Pennsylvania, LLC             Pennsylvania
BFI Transfer Systems of Texas, LP                     Delaware
BFI Transfer Systems of Virginia, LLC                 Delaware
BFI Waste Services of Indiana, LP                     Delaware
BFI Waste Services of Massachusetts, LLC              Massachusetts
BFI Waste Services of Pennsylvania, LLC               Pennsylvania
BFI Waste Services of Tennessee, LLC                  Delaware
BFI Waste Services of Texas, LP                       Delaware
BFI Waste Systems of Alabama, LLC                     Delaware
BFI Waste Systems of Arkansas, LLC                    Delaware
BFI Waste Systems of Georgia, LLC                     Delaware
BFI Waste Systems of Indiana, LP                      Delaware
BFI Waste Systems of Kentucky, LLC                    Delaware
BFI Waste Systems of Louisiana, LLC                   Delaware
BFI Waste Systems of Missouri, LLC                    Delaware
BFI Waste Systems of Mississippi, LLC                 Delaware
BFI Waste Systems of North Carolina, LLC              Delaware
BFI Waste Systems of Oklahoma, LLC                    Oklahoma
BFI Waste Systems of Massachusetts, LLC               Massachusetts
BFI Waste Systems of Pennsylvania, LLC                Pennsylvania
BFI Waste Systems of South Carolina, LLC              Delaware
BFI Waste Systems of Tennessee, LLC                   Delaware
BFI Waste Systems of Texas, LP                        Delaware
BFI Waste Systems of Virginia, LLC                    Delaware
Eagle Industries Leasing, Inc.                        Michigan
Frontier Waste Services, L.P.                         Texas
Frontier Waste Services (Utah), LLC                   Utah
Frontier Waste Services (Colorado), LLC               Colorado
Frontier Waster Services of Louisiana, L.L.C.         Louisiana
General Refuse Service of Ohio, LLC                   Ohio
Greenridge Waste Services, LLC                        Pennsylvania
Greenridge Reclamation, LLC                           Pennsylvania
</TABLE>

                                      -8-
<PAGE>   8
<TABLE>
<S>                                                   <C>
Jetter Disposal, Inc.                                 Iowa
La Canada Disposal Company, Inc.                      California
McInnis Waste Systems, Inc.                           Oregon
Packman, Inc.                                         Kansas
Paper Fibres Company                                  Washington
Panama Road Landfill, TX, L.P.                        Delaware
Price & Sons Recycling Company                        Georgia
Royal Holdings, Inc.                                  Michigan
</TABLE>

                                      -9-

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