Document:

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                                                                   EXHIBIT 10.10

                          ALLIED WASTE INDUSTRIES, INC.

                     SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN

                            EFFECTIVE AUGUST 1, 2003

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                               ARTICLE 1. THE PLAN

         1.1 Establishment of the Plan. The Company hereby establishes this
supplemental executive retirement plan, effective as of August 1, 2003. This
plan shall be known as the "Allied Waste Industries, Inc. Supplemental Executive
Retirement Plan".

         1.2 Purpose of the Plan. This Plan is intended to provide deferred
compensation, in the form of Retirement Benefits otherwise payable pursuant to
Employment Agreements, to a "select group of management or highly compensated
employees" within the meaning of ERISA Section 201(2). As such, this Plan is
intended to be exempt from the participation, vesting, funding, and fiduciary
requirements of Title I of ERISA, to the fullest extent permitted by the law.
This Plan shall at all times be "unfunded" within the meaning of ERISA and the
Code.

                             ARTICLE 2. DEFINITIONS

         Whenever used in the Plan, the following terms shall have the meanings
set forth below unless otherwise expressly provided. When the defined meaning is
intended, the term is capitalized. The definition of any term in the singular
shall also include the plural. Words used in the masculine form shall include
the feminine form.

         2.1 "Board" means the Company's Board of Directors or an authorized
committee thereof.

         2.2 "Code" means the Internal Revenue Code of 1986, as amended from
time to time. A reference to a particular section of the Code shall also be
deemed to refer to any other regulatory guidance under that Code section.

         2.3 "Employment Agreement" means the agreement between a Participant
and the Company, setting forth the terms of the Participant's employment,
including but not limited to the right to receive Retirement Benefits.

         2.4 "ERISA" means the Employee Retirement Income Security Act of 1974,
as amended from time to time. A reference to a particular section of ERISA shall
also be deemed to refer to any regulatory guidance under that section.

         2.5 "Participant" means an eligible individual who is designated as a
Participant in accordance with Article 3.

         2.6 "Participation Date" means the effective date of a Participant's
participation in the Plan, as specified in Schedule A.

         2.7 "Plan" means this Allied Waste Industries, Inc. Supplemental
Executive Retirement Plan, as may be amended from time to time. The Employment
Agreements, together with this Plan document, shall be deemed to constitute a
single plan.

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         2.8 "Plan Administrator" means the Management Development/Compensation
Committee of the Board.

         2.9 "Plan Year" means the calendar year.

         2.10 "Retirement" shall have the same meaning as defined in the
Participant's Employment Agreement.

         2.11 "Retirement Date" shall be the date upon which the Participant is
entitled to receive or begin receiving Retirement Benefits, as provided for in
the Participant's Employment Agreement.

         2.12 "Retirement Benefits" means the cash compensation provided for in
the Participant's Employment Agreement in the event of the Participant's
termination of employment with the Company due to Retirement.

                    ARTICLE 3. ELIGIBILITY AND PARTICIPATION

         3.1 Eligibility. Eligibility to participate in the Plan shall be
limited to a select group of management or highly compensated employees of the
Company whose Employment Agreements provide for Retirement Benefits.

         3.2 Participation. Those eligible employees who are listed on Schedule
A shall participate in the Plan as of their Participation Date. The Company may
amend Schedule A from time to time. A Participant shall cease to be a
Participant when all benefits due under the Plan have been paid in full or, if
earlier, the effective date on which the Participant is no longer designated as
eligible to participate and/or the date on which the Participant terminates
employment with the Company for any reason other than Retirement.

                          ARTICLE 4. RETIREMENT BENEFIT

         When a Participant reaches his Retirement Date, he shall receive or
begin receiving payment of his Retirement Benefits. The Participant's Retirement
Benefits shall be paid in the amount, time, and form as required in the
Participant's Employment Agreement.

                                ARTICLE 5. TRUST

         5.1 Trust. The Company may establish and maintain a trust as part of
the Plan, to implement the provisions of the Plan. If the Company establishes a
trust, it will be treated as a grantor trust under Code Sections 671 through
679, and the Company may make such contributions as it determines. Any trust
will be trusteed by an independent third-party trustee appointed by the Company
and will be unsecured from creditors to the extent described in the trust
document.

         5.2 Investments of the Trust. If the Company establishes a trust, the
Company shall determine how trust assets shall be invested. No person shall have
any interest whatsoever in any specific asset of the Company or the trust. To
the extent that any person acquires a right to receive

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payments under the Plan, such right shall be no greater than the rights of any
unsecured general creditor of the Company.

                            ARTICLE 6. ADMINISTRATION

         6.1 Administration. The Plan shall be administered by the Plan
Administrator:

                  (a) The Plan Administrator shall have all powers necessary or
appropriate to carry out the provisions of the Plan. The Plan Administrator may,
from time to time, establish rules for the administration of the Plan and the
transaction of the Plan's business.

                  (b) The Plan Administrator shall have the exclusive right to
make any finding of fact necessary or appropriate for any purpose under the Plan
including, but not limited to, the determination of eligibility for and amount
of any benefit.

                  (c) The Plan Administrator shall have the exclusive right to
interpret the terms and provisions of the Plan and to determine any and all
questions arising under the Plan or in connection with its administration,
including, without limitation, the right to remedy or resolve possible
ambiguities, inconsistencies, or omissions by general rule or particular
decision, all in its sole and absolute discretion.

                  (d) All findings of fact, determinations, interpretations, and
decisions of the Plan Administrator shall be conclusive and binding upon all
persons having or claiming to have any interest or right under the Plan and
shall be given the maximum deference allowed by law.

         6.2 Appeals from Denial of Claims.

                  (a) If any claim for benefits under the Plan is wholly or
partially denied, the claimant shall be given notice of the denial. This notice
shall be in writing, within a reasonable period of time after receipt of the
claim by the Plan Administrator. This period shall not exceed 90 days after
receipt of the claim, except that if special circumstances require an extension
of time, written notice of the extension shall be furnished to the claimant, and
an additional 90 days shall be considered reasonable.

                  (b) This notice shall be written in a manner calculated to be
understood by the claimant and shall set forth the following information:

                           (i) the specific reasons for the denial;

                           (ii) specific reference to the Plan provisions on
         which the denial is based;

                           (iii) a description of any additional material or
         information necessary for the claimant to perfect the claim and an
         explanation of why this material or information is necessary;

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                           (iv) an explanation that a full and fair review by
         the Plan Administrator of the decision denying the claim may be
         requested by the claimant or an authorized representative by filing
         with the Plan Administrator, within 60 days after the notice has been
         received, a written request for the review; and

                           (v) if this request is so filed, an explanation that
         the claimant or an authorized representative may receive pertinent
         documents and submit issues and comments in writing within the same
         60-day period specified in Subsection (iv).

                  (c) The decision of the Plan Administrator upon review shall
be made promptly, and not later than 60 days after the Plan Administrator's
receipt of the request for review, unless special circumstances require an
extension of time for processing. In this case, the claimant shall be so
notified, and a decision shall be rendered as soon as possible, but not later
than 120 days after receipt of the request for review. If the claim is denied,
wholly or in part, the claimant shall be given a copy of the decision promptly.
The decision shall be in writing, shall include specific reasons for the denial,
shall include specific references to the pertinent Plan provisions on which the
denial is based, and shall be written in a manner calculated to be understood by
the claimant.

         6.3 Tax Withholding. The Company may withhold from any payment under
this Plan any federal, state, or local taxes required by law to be withheld with
respect to the payment and any sum the Company may reasonably estimate as
necessary to cover any taxes for which they may be liable and that may be
assessed with regard to the payment.

         6.4 Expenses. All expenses incurred in the administration of the Plan
shall be paid by the Company.

                ARTICLE 7. AMENDMENT AND TERMINATION OF THE PLAN

         The Company hereby reserves the right to amend, modify, or terminate
the Plan in whole or in part, at any time, and for any reason, by action of the
Board.

                       ARTICLE 8. MISCELLANEOUS PROVISIONS

         8.1 Severability. If any provisions of this Plan shall be held illegal
or invalid, the illegality or invalidity shall not affect its remaining parts.
The Plan shall be construed and enforced as if it did not contain the illegal or
invalid provision.

         8.2 Applicable Law. Except to the extent preempted by applicable
Federal law, this Plan shall be governed by and construed in accordance with the
laws of the State of Arizona without regard to conflict of laws provisions.

         Dated:  _____, 200_.

                                                ALLIED WASTE INDUSTRIES, INC.,

                                                  A DELAWARE CORPORATION

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                                        By _____________________________________

                                        Title __________________________________
                                                                      "Company"

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                          ALLIED WASTE INDUSTRIES, INC.

                     SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN

                                   SCHEDULE A

                            Effective August 1, 2003

PARTICIPANT                         PARTICIPATION DATE

Thomas W. Ryan                      August 1, 2003<PAGE>

                                                                   EXHIBIT 10.11

                                AMENDMENT TO THE
                          ALLIED WASTE INDUSTRIES, INC.
                            1993 INCENTIVE STOCK PLAN

                                    (2004-1)

         THIS AMENDMENT, is made and entered into on February 5, 2004, by ALLIED
WASTE INDUSTRIES, INC., a Delaware corporation ("Employer").

                                R E C I T A L S:

         1. The Employer maintains the Allied Waste Industries, Inc. 1993
Incentive Stock Plan ("Plan");

         2. The Employer has reserved the right to amend the Plan in whole or in
part; and

         3. The Employer intends to amend the Plan.

         THEREFORE, the Employer hereby adopts this Amendment as follows:

         1. Section 6(c)(3) of the Plan is hereby amended to read as follows:

                  An Option shall be exercised by delivering notice to the
         Company's principal office, to the attention of its Secretary, along
         with the agreement evidencing the Option and payment for shares of
         Common Stock to be purchased upon the exercise of the Option. The
         notice must specify the number of shares of Common Stock with respect
         to which the Option is being exercised and must be signed by the
         Participant. Payment shall be made either (A) in cash, by certified
         check, bank cashier's check or wire transfer, (B) subject to the
         approval of the Committee, in shares of Common Stock owned by the
         Participant for a period of at least six months prior to the effective
         date on which the Option is exercised and valued at their Fair Market
         Value on the effective date of such exercise, (C) subject to the
         approval of the Committee, in the form of a "cashless exercise" (as
         described below) or (D) subject to the approval of the Committee, in
         any combination of the foregoing. Any payment in shares of Common Stock
         shall be effected by the delivery of such shares to the Secretary of
         the Company, duly endorsed in blank or accompanied by stock powers duly
         executed in blank, together with any other documents and evidences as
         the Secretary of the Company shall require from time to time. The
         effective date on which an Option is exercised shall be established by
         the Secretary and shall occur within an administratively reasonable
         period of time (but no later than five business days) after the
         Secretary receives the notice, agreement, and payment referred to
         above. Prior to the exercise date, the Participant may withdraw the
         notice, in which case the Option will not be exercised.

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                  The cashless exercise of an Option shall be pursuant to
         procedures whereby the Participant, by written notice, irrevocably
         directs (A) an immediate market sale or margin loan with respect to all
         or a portion of the shares of Common Stock to which he is entitled upon
         exercise pursuant to an extension of credit by a brokerage firm or
         other party (provided that such brokerage firm or other party is not
         affiliated with the Company) of the exercise price and any tax
         withholding obligations resulting from such exercise, (B) the delivery
         of the shares of Common Stock directly from the Company to a brokerage
         firm or other party, and (C) delivery to the Company from the brokerage
         firm or other party, from the proceeds of the sale or the margin loan,
         of an amount sufficient to pay the exercise price and any tax
         withholding obligations resulting from such exercise.

         2. The Effective Date of this Amendment shall be February 5, 2004.

         3. Except as amended, all of the terms and conditions of the Plan shall
remain in full force and effect.

                                   ALLIED WASTE INDUSTRIES, INC., a
                                     Delaware corporation

                                   By _______________________________
                                      Steven M. Helm, Senior Vice President and
                                      General Counsel

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