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Exhibit 10.105 OPERATING AGREEMENT FOR THE
CO-OWNERSHIP OF WASTEWATER EFFLUENT This Agreement (the Agreement) is made and entered into this 16th day of
November, 2000 (the Effective Date), by and between Arizona Public Service Company, a
corporation organized and existing under and by virtue of the laws of the State of Arizona (APS)
and Salt River Project Agricultural Improvement and Power District, an agricultural improvement
district organized and existing under and by virtue of the laws of the State of Arizona (SRP).
SRP and APS are collectively referred to herein as the Parties; each is individually a Party
to this Agreement. RECITALS: A. APS, SRP, and the City of Tolleson have executed an Agreement for the Sale and Purchase
of Wastewater Effluent, dated November 13, 2000 (the Tolleson Agreement), and each Party to
this Agreement desires to more particularly describe its rights and responsibilities vis-a-vis
the other Party as a co-owner of Tolleson Effluent; B. The primary use of the Tolleson Effluent is intended to be for cooling water at Palo
Verde Nuclear Generating Station (PVNGS); the secondary use of the Tolleson Effluent will be
its use at Other Electric Generating Facilities (as defined by the Tolleson Agreement); C. To the extent Tolleson Effluent is not used at PVNGS, the Tolleson Effluent may be used
at or for the benefit of Other Electric Generating Facilities; D. It is appropriate to establish terms and conditions on which APS, SRP, and their
respective affiliates, including Pinnacle West Energy Corporation (PWE), will make use of the
Tolleson Effluent and make decisions regarding the use of same in the future; E. The Parties desire to enter into this Agreement to set forth their respective rights and
obligations pertaining to the co-ownership of the Tolleson Effluent. Accordingly, this Agreement
is an ancillary document or companion agreement in relation to the Tolleson Agreement. NOW, THEREFORE, in consideration of the agreements and promises set forth below, and, other
good and valuable considerations, the receipt and sufficiency of which are acknowledged, the
parties hereby agree as follows: ARTICLE IDEFINITIONS AND USAGE 1.1 Definitions. As used herein, the following capitalized terms shall have the same
meaning as they are given by definition in the Tolleson Agreement: Delivery Point, Effluent,
Effluent Pipeline, Notice of Commitment, Other Electric Generating Facilities, Outages, Reserved
Effluent, Surplus Effluent, Tolleson, and Uncontrollable Forces. All such definitions from the
Tolleson Agreement are specifically incorporated in this




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Agreement by this reference. In addition, the following terms shall have the specified
meanings: Claimmeans any demand, claim, cause of action, lawsuit, or proceeding of any kind or
character, including investigation or audit by a Governmental Authority. Coordinating Committeehas the meaning specified in Article 4. Effective Datehas the meaning specified in the introductory paragraph. Event of Defaulthas the meaning specified in Section 7.1. Governmental Authoritymeans a federal, state, local or foreign governmental authority or
body politic; a state, province, commonwealth, territory or district; a county; a city, town,
township, village or other municipality; a district or other subdivision or any of the foregoing;
any executive, legislative or other governing body of any of the foregoing; any agency,
authority, board, department, system, service, office, commission, committee, council, or other
administrative body of any of the foregoing; any court or other judicial body; a legally
recognized tribal authority; and any officer, official or other representative of any of the
foregoing when acting in their official capacity. For purposes of this Agreement, neither SRP
nor APS shall be considered a Governmental Authority. Legal Requirementmeans any statute, law, regulation, ordinance, rule, judgment, order,
decree, constitution, Permit, concession, grant, franchise, agreement, directive or common law,
or any requirement of, or other governmental restriction or any similar form of decision by, or
interpretation or administration of any of the foregoing by, any Governmental Authority of
competent jurisdiction (or by an arbitrator in a forum involving binding arbitration to which one
of the parties or its business or assets is subject or bound). Palo Verde Nuclear Generating Stationor PVNGSmeans the Arizona Nuclear Power Project,
as defined in the Arizona Nuclear Power Project Participation Agreement (including amendments
1-13) among APS, SRP, Southern California Edison, Public Service Company of New Mexico, El Paso
Electric Company, Southern California Public Power Authority, and the Department of Water and
Power of the City of Los Angeles (collectively, the PVNGS Participants). Partyor Partieshas the meaning specified in the introductory paragraph and shall
include permitted successors and assigns. Permitmeans any permit, consent, license, rezoning, variance, use permit, certification,
notice, filing, approval, or authorization of any kind required to be issued by a Governmental
Authority and any necessary consent or approval required to be granted by any non-Governmental
Authority, other than a Party, in order to develop, construct, own, or operate any facility that
is contemplated or required because of decisions made pursuant to this Agreement. 2




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Personmeans any natural person, corporation, limited liability company, partnership,
business trust, Governmental Authority or other entity. PWEmeans Pinnacle West Energy Corporation, an Arizona Corporation and an affiliate of
APS. Tolleson Effluentmeans all Effluent purchased by APS and SRP from the City of Tolleson
pursuant to the Tolleson Agreement, whether such Effluent is Surplus Effluent or Reserved
Effluent, as those terms are defined in the Tolleson Agreement. 1.2 Certain Principles of Interpretation. In this Agreement, unless otherwise
indicated or the context otherwise requires: (i) the singular includes the plural and plural the singular when the context requires; (ii) words importing any gender include the other gender; (iii) references to writing include printing, typing, lithography, and other means of
reproducing words in a tangible visible form; (iv) the words including, includes, and include shall be deemed to be followed in each
instance by the words, without limitation; (v) references to articles, sections, paragraphs, recitals, and exhibits are to this Agreement
unless otherwise stated; (vi) references to contracts and related instruments shall be deemed to include all subsequent
amendments, extensions, and other modifications to such instruments (without, however, limiting any
prohibition on any such amendments, extensions and other modifications by the terms of this
Agreement); (vii) references to Persons include their respective permitted successors and assigns and, in
the case of Governmental Authorities, persons succeeding to their respective functions and
capacities; (viii) the words hereof, herein, hereunder, and words of similar import shall refer to
this Agreement as a whole and not to any particular provision thereof; (ix) both Parties and their counsel participated extensively in the preparation and drafting
of this Agreement; no rule of construction shall apply that would cause the interpretation of any
claimed ambiguity in this Agreement against a Party determined to be the drafting Party; (x) captions and headings in this Agreement are included herein for convenience of reference
only and shall not constitute a part of this Agreement for any other purpose; 3




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(xi) any provision of this Agreement that is prohibited or unenforceable in any jurisdiction
shall, as to such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof or affecting the validity or
enforceability of such provision in any other jurisdiction and the provision that is prohibited or
unenforceable shall be reformed or modified to reflect the parties intent to the maximum extent
permitted by applicable law; and (xii) references to a day, week, month, or year shall be construed as a calendar day,
week, month, or year. ARTICLE 2PURPOSE AND SCOPE The purpose of this Agreement is to set forth certain agreements and understandings
between the Parties concerning the ownership and use of the Tolleson Effluent, the allocation of
costs incurred in connection with the Tolleson Agreement and this Agreement, and the
responsibilities and obligations of each Party. This Agreement relates solely to the business,
activities, and purposes set forth herein and, except as otherwise expressly provided herein,
does not apply to any other activities, transactions, relationships, contracts, projects, or work
of the Parties. Subject to Article 4, no Party shall be restricted in any way from engaging in
any activity or business falling outside the scope of this Agreement. ARTICLE 3OWNERSHIP AND USE OF TOLLESON EFFLUENT 3.1 Co-Ownership and Use of Effluent Purchased from Tolleson. APS and SRP
agree that they are and shall be co-owners, as tenants in common, of all Tolleson Effluent
purchased pursuant to the Tolleson Agreement, each Party possessing a 50% undivided interest in
all such Tolleson Effluent. Consistent with the Tolleson Agreement, the Parties agree that the
primary use of the Tolleson Effluent shall be for cooling water for PVNGS and that PVNGS shall
have a priority right to the use of any or all of the Tolleson Effluent to satisfy such
requirements for cooling water at PVNGS as are not fully satisfied using effluent from
non-emergency sources other than Tolleson. To the extent that Tolleson Effluent is available for
use at Other Electric Generating Facilities, the allocation of and the benefit from any such
Effluent shall be divided between APS and SRP (or their permitted assigns) in the manner
determined by the Coordinating Committee pursuant to Article 4. Any use of Tolleson Effluent at
or for the benefit of Other Electric Generating Facilities shall be consistent with the terms of
both this Agreement and the Tolleson Agreement. 3.2 Use of Tolleson Effluent at PVNGS. The Parties hereby agree that all Tolleson
Effluent used at PVNGS shall be transferred to the PVNGS Participants at the Delivery Point
specified in the Tolleson Agreement. All aspects of transportation, treatment, use, disposal and
payment for any Tolleson Effluent so transferred and used at PVNGS shall be the responsibility of
APS, as the Operating Agent of PVNGS, upon discharge of that Effluent into the
Effluent Pipeline, and commencing upon such discharge, APSs rights and obligations with respect
to such Tolleson Effluent shall be those of the 4




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Operating Agent under the terms of the Arizona Nuclear Power Project Participation
Agreement, including but not limited to the liability provisions set forth in that Participation
Agreement. The Parties to this Agreement shall not receive any fee or other compensation for
transfer to the PVNGS Participants of Tolleson Effluent used at PVNGS. 3.3 Use of Tolleson Effluent at or For the Benefit of Other Electric Generating
Facilities. Tolleson Effluent, if not required for cooling water purposes at PVNGS, may
be used at or for the benefit of Other Electric Generating Facilities upon such terms and
conditions as the Parties may separately agree, or as determined by the Coordinating Committee
pursuant to Article 4. In this regard, the Parties contemplate that up to 6,500 acre-feet per
year of available Tolleson Effluent will be transferred to PWE for use at the proposed electric
generating facility commonly referred to as Redhawk pursuant to separate terms and conditions to
be negotiated by the Parties, including, without limitation, payment of a fee by PWE to SRP and
APS. Depending upon circumstances at the time, additional quantities of Tolleson Effluent may be
approved for use at Redhawk after negotiation by the Parties and appropriate review and approval
by the Coordinating Committee of any agreement that may be negotiated, including, without
limitation, payment of a fee by PWE to SRP and APS. ARTICLE 4COORDINATING COMMITTEE 4.1 Coordinating Committee. Each Party shall designate one(1.) representative (Representative) to serve on the Coordinating Committee and
one (1) alternate (Alternate), each having an appropriate level of technical expertise and
familiarity with the policies of its executive management. The Parties; hereby form the
Coordinating Committee, the initial Representatives and Alternates of which are as follows: Party
    
    Representative
    
    AlternateSRP
    
    David Areghini
    
    Gary HarperAPS
    
    James M. Levine
    
    Richard Gouge
 A Party may change its Representative or Alternate upon notice to the other Party. (The term
Representative shall include the designated Representative or any Alternate that is actually
performing the duties of the Representative.) 4.2 Coordinating Committee Authority. The Coordinating Committee shall have the
following responsibilities and authority, subject to and consistent with the other terms of this
Agreement and any separate agreement between the Parties that allocates any portion of Tolleson
Effluent for a specific use: (i) monitoring, directing, coordinating, and managing the activities of the Parties
undertaken pursuant to this Agreement and, except as provided in Section 5.1 hereof, allocating
the costs and benefits thereof between the Parties in equal shares; (ii) determining whether to issue a Notice of Commitment pursuant to paragraph 8.2 of the
Tolleson Agreement, and approving all proposed uses of Tolleson Effluent, except to the extent
that such issues are determined by the terms of any separate 5




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agreement between the Parties that allocates any portion of Tolleson Effluent for a specific
use; (iii) authorizing negotiations and approving all other contracts or commissioning such
studies, investigations, or reports as the Coordinating Committee deems desirable or necessary; (iv) determining the agenda, scope, participants and attendees at meetings of, and other
matters relating to, the Coordinating Committee; and (v) performing any other responsibility, duty, or authority granted from time to time to the
Coordinating Committee by amendment of this Agreement. 4.3 Actions of the Coordinating Committee. No Party shall take any action with
respect to allocation of Tolleson Effluent to any Other Electric Generating Facility except as
may be specifically authorized by this Agreement or as agreed to and approved by the Coordinating
Committee. No action of the Coordinating Committee shall be binding unless and until: (i) such
action has been set forth in a writing submitted to the Representatives; (ii) the Representatives
have had ten days after receipt of the writing to review it; and (iii) the action has been
approved in writing by the Representative of each of the Parties. Failure to approve an action
within such ten day period shall not constitute approval; provided, however, that each Party
shall make good faith efforts to review and approve or reject each action within the ten day
period. Approval of or failure to object to the minutes of a meeting of the Coordinating
Committee shall not be deemed to constitute written approval of any action taken thereat. All
actions approved by the Coordinating Committee shall be carried out by one or more of the
Parties, as specified in the written approval of such action; any approval which does not specify
the responsible party for the action shall be carried out by the Party having principal
responsibility, as set forth in. Article 5. 4.4 Term. The Coordinating Committee shall dissolve and have no further authority
upon (i) the due termination of this Agreement pursuant to any provision hereof, except to the
extent it is expressly agreed in writing that the Coordinating Committee is needed to manage
those matters that survive termination; or (ii) the unanimous agreement of the Parties to
dissolve the Coordinating Committee. 4.5 Meetings. A. Time and Conduct of Meetings: Quorum. The Coordinating Committee shall meet
during the term of this Agreement, on an as needed basis or at the request of either
Representative, at such times and at such places as the Representatives may from time to time
agree. Meetings of the Coordinating Committee may be held in person or by telephone, video
conference, or other agreed means. Each Representative shall be given reasonable advance notice
of all Coordinating Committee meetings and all matters to be voted on by the Coordinating
Committee. A quorum for a meeting of the Coordinating Committee shall consist of one
representative of each Party. Any substantive decisions of the Coordinating Committee shall be
documented in writing and approved by both Representatives. 6




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B. Attendance. Each Party shall use reasonable efforts to cause its Representative
to be present at each meeting of the Coordinating Committee and no Party shall withhold the
presence or participation of its Representative to forestall decisions on any matter pertaining
to this Agreement. A Party may, without notice, cause any of its employees or its legal counsel
to attend any meeting of the Coordinating Committee. In addition, a Party may, upon reasonable
notice to the Coordinating Committee, request that individuals other than its employees and legal
counsel be allowed to attend a meeting of the Coordinating Committee. No individuals other than
the Representatives shall be permitted to vote on behalf of a Party. The Coordinating Committee
may require the execution of a confidentiality agreement by any individual other than the
Representatives, Alternates, employees, and legal counsel of the Parties as a condition to
approving such individuals attendance at a Coordinating Committee meeting. ARTICLE 5PRINCIPAL RESPONSIBILITY 5.1 Implementing Decisions of Coordinating Committee. APS shall have principal
responsibility for carrying out the actions of the Coordinating Committee, and implementing
decisions of the Coordinating Committee, unless otherwise specified pursuant to Section 4.3 or
5.2 hereof. In addition, as set forth in paragraph 12.5.1 of the Tolleson
Agreement, APS is authorized to act for and on behalf of SRP in all matters affecting the
implementation and performance of the Tolleson Agreement when the performance in question
involves transportation and use of Tolleson Effluent at PVNGS. The intent of said paragraph
12.5.1 is to authorize APS to act both as the Party with principal responsibility under this
Agreement and as Operating Agent for PVNGS in managing all Tolleson Effluent to be used at PVNGS.
Notwithstanding the provisions of this Section, either Party may take any appropriate, lawful
action to cure a breach of the Tolleson Agreement caused by the other Party. 5.2 Responsibility for Transferred Tolleson Effluent. 5.2.1 Transfers for Use at PVNGS. Consistent with Section 3.2 above, APS and SRP
shall request acceptance by the PVNGS Participants of responsibility for, and risks associated
with, transportation, treatment, use, disposal and payment for all Tolleson Effluent to be used
at PVNGS. Responsibility for, and risks associated with, transportation, treatment, use,
disposal and payment for Tolleson Effluent to be used at PVNGS, shall be transferred to the PVNGS
Participants at the Delivery Point specified in the Tolleson Agreement. Acceptance by the PVNGS
Participants of the transfer of Tolleson Effluent, and responsibility for, and risks associated
with, its transportation, treatment, use disposal and payment, shall be documented in the minutes
of the Administrative Committee established pursuant to Section 6.1.1 of the Arizona Nuclear
Power Project Participation Agreement. 5.2.2 Transfers for Use at Other Electric Generating Facilities. As between the
Parties to this Agreement and the party or parties owning or operating a specific Other Electric
Generating Facility, responsibility for, and risks associated with, transportation, treatment,
use, disposal and payment for Tolleson Effluent to be used at the Other Electric Generating
Facility shall be transferred to the party or parties owning an 7




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interest in or operating the Other Electric Generating Facility, such transfer to occur at
the Delivery Point specified in the Tolleson Agreement. Acceptance of this transfer of
responsibility for, and risks associated with, Tolleson Effluent to be used at Other Electric
Generating Facilities shall be documented in the agreement(s) by which the Tolleson Effluent is
transferred to the party owning or operating the Other Electric Generating Facility.
Notwithstanding the transfer of responsibility and risk to the party or parties owning or
operating the Other Electric Generating Facility, ownership of the Tolleson Effluent shall not
transfer until physical delivery of the Tolleson Effluent to that party or parties at the
delivery point specified in the agreement transferring the Tolleson Effluent. 5.3 Permitting. APS shall have principal responsibility to ensure compliance with
any Legal Requirement applicable to the actions of the Coordinating Committee and to ensure
that any Person using Tolleson Effluent purchased by the Parties secures any Permit and
otherwise satisfies any Legal Requirement applicable to the transportation and delivery of
Tolleson Effluent to the point of delivery agreed upon by the Parties; provided, however, that
in any case where SRP will make use of Tolleson Effluent at or for the benefit of Other
Electric Generating Facilities operated or solely owned by SRP or any affiliated or successor
entity, then from and after the delivery point agreed upon by the Parties, SRP shall have
principal responsibility to ensure compliance with any Legal Requirement, and to secure any
Permit, applicable to its intended use of the Tolleson Effluent. ARTICLE 6TERM 6.1 Term. This Agreement shall commence on the Effective Date and shall terminate
upon the expiration or termination of the Tolleson Agreement. 6.2 Survival. All obligations and liabilities of the Parties under this Agreement
shall cease upon termination except the obligation of the Parties under Article 9, obligations
assigned pursuant to this Agreement to the Coordinating Committee with the expressed, written
intent that they survive this Agreement, and the liabilities of any Party resulting from a
default by such Party leading to such termination. ARTICLE 7DEFAULT 7.1 Events of Default. A Party shall be in default under this Agreement upon the
occurrence of the following (Event of Default): if it fails to render performance required
under any material provision of this Agreement when due and such failure continues unremedied
for thirty (30) days following written notice to the Party in default given by the other Party.
Neither APS nor SRP shall be in default under this Agreement due to Uncontrollable Forces and
Outages as identified in Section 9.1 of the Tolleson Agreement. It shall also be an Event of
Default if a Party shall have commenced any insolvency, receivership, bankruptcy, liquidation,
or similar proceedings and (i) one hundred twenty (120) days shall have expired from the
commencement of any one or more of such proceedings, and (ii) a petition commencing the
proceeding has not been dismissed or stayed within that time. 8




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7.2 Actions upon Event of Default. In the event of any dispute between the Parties
concerning the rights and obligations created by this Agreement, or concerning any Event of
Default, the Parties shall first confer in an attempt to informally resolve such dispute without
need to resort to arbitration or litigation. The Parties shall not resort to arbitration or
litigation to enforce their rights under this Agreement until they have conferred in good faith
over a period of not less than fifteen days in an attempt to informally resolve their dispute.
If the Parties are unable to resolve their dispute after conferring as required in the preceding
sentence, then during the period that any Event of Default continues, the non-defaulting Party
may, without prejudice to any other available rights or remedies under this Agreement or at law
or in equity, and without constituting an election of an exclusive remedy for an
Event of Default, initiate either or both of the following: (i) proceedings to partition the
Tolleson Effluent and thereby terminate the co-tenancy of the Parties in the Tolleson Effluent,
or (ii) non-binding arbitration by one arbitrator who has not previously been employed by either
party (excluding employment as an arbitrator), and does not have a direct or indirect interest in
either Party or the subject matter of the arbitration. The arbitrator shall either be as
mutually agreed by the Parties within fifteen (15) calendar days after submission of the matter
to arbitration, or failing agreement shall be selected under the expedited rules of the American
Arbitration Association (AAA). The rules of AAA shall apply to the extent not inconsistent
with the provisions in this Section. Arbitration shall be conducted according to the following:
(a) not later than seven (7) days prior to the hearing date set by the arbitrator, each party
shall submit a brief with a single proposal for settlement; (b) the hearing shall be conducted on
a confidential basis without continuance or adjournment; and (c) the Parties shall divide equally
the cost of the arbitrator and the hearing, and each Party shall be responsible for its own
expenses, including its counsel and representatives. ARTICLE 8NOTICES 8.1 Notice Provision. All notices, demands, consents or other communications
required under this Agreement shall be in writing and may be delivered personally to a Party,
may be delivered by facsimile providing written confirmation of successful transmission, or may
be mailed by deposit in the United States Certified Mail, return receipt requested, or by
deposit with a reputable overnight delivery service. Notices shall be effective: (i) on the date delivered by personal delivery or facsimile; (ii) three (3) business days following the date deposited in the United States mail; or (iii) the next business day following delivery to a reputable overnight delivery service. Notices or communications shall be delivered and mailed to the Parties at the addresses set forth
in paragraph 12.4 of the Tolleson Agreement, or to any address of a Party which is substituted from
time to time by written notice of such Party pursuant to paragraph 12.4 of the Tolleson Agreement. 9




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ARTICLE 9LIABILITY 9.1 Limitation of Liability. The liability of a Party to the other Party under this
Agreement shall be limited to the direct damages actually sustained by the other Party. NEITHER
PARTY SHALL BE LIABLE TO THE OTHER PARTY FOR ANY LOSS OR DAMAGE IN THE NATURE OF PARTIAL OR
COMPLETE LOSS OF USE OF ANY GENERATING FACILITY, LOSS OF ELECTRIC POWER, COST OF REPLACEMENT OF
ELECTRIC POWER, OR FOR ANY LOSS OF INTEREST, REVENUE OR ANTICIPATED PROFITS FROM ACTIVITIES UNDER
THIS AGREEMENT. NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, PUNITIVE OR
CONSEQUENTIAL DAMAGES, OR LOST PROFITS, ARISING OUT OF OR RELATED TO THIS AGREEMENT. (The
limitations in this Section 9.1 shall not apply to losses in tort to third parties or to Claims
against which a Party is entitled to indemnitee protection under Section 9.2.) 9.2 Indemnity. Except as otherwise provided in any subsequent agreement between the
Parties (or between the Parties and other entities), each Party (Indemnifying Party) shall
defend, indemnify, and hold harmless the other Party and its respective affiliates, directors,
officers, partners, members, employees, agents, and representatives (each an Indemnitee) from and
against any and all Claims, liability, cost, loss or expense of any kind incurred by the
Indemnitees arising out of the fraud or willful misconduct of the Indemnifying Party or its agents
or representatives in connection with this Agreement, or arising out of a material breach of the
Tolleson Agreement by the Indemnifying Party. Except as limited by any separate agreement between
the Parties, each Party shall also indemnify and hold harmless the other Party against any and all
Claims, liability, cost, loss or expense of any kind resulting from the Indemnifying Partys
control, transportation, use or disposal of Tolleson Effluent at or for the benefit of any of the
Indemnifying Partys Other Electric Generating Facilities In the event any such Claim, liability,
cost, loss or expense asserted by a person not a Party to this Agreement is caused by an alleged
joint or concurrent fraud, negligence or willful misconduct, the Parties at fault shall bear
liability in proportion to their own degrees of culpability. Each Indemnitee is an intended
beneficiary of this Section 9.2. The indemnification obligation of the parties set forth in this
Section shall survive the termination or expiration of this Agreement. ARTICLE 10GENERAL 10.1 Entire Agreement. This Agreement supersedes all prior and contemporaneous
conduct and communications between the Parties pertaining to co-ownership of the Tolleson Effluent,
whether written or oral. Notwithstanding the foregoing, this Agreement shall be read together with
the Tolleson Agreement, and any agreement by which APS and SRP transfer any portion of the Tolleson
Effluent for use at or for the benefit of Other Electric Generating Facilities, to obtain necessary
definitions and to otherwise determine the intention of the Parties. This Agreement is not
intended to modify or abrogate either the Tolleson Agreement or any subsequent agreement by which
APS and SRP transfer any portion of the Tolleson Effluent for use at or for the benefit of Other
Electric Generating 10




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Facilities. This Agreement may not be modified, changed or added to except in writing signed
by all Parties hereto. 10.2 Waiver. Each Partys failure or delay in enforcing the terms and conditions of
this Agreement or insisting upon strict performance of any of the other Partys obligations shall
not be interpreted as a waiver thereof. Waiver of any provision of this Agreement shall only be
effective if in writing and shall not be interpreted as a waiver of any subsequent breach or
failure under the same or any other provision of this Agreement. No conduct, statement, course of
conduct, course of dealing, oral expression or other action shall be construed as a waiver. 10.3. Assignment. 10.3.1 Assignment by APS to PWE. APS may assign its rights and delegate its duties
under this Agreement at any time to PWE, provided that: (i) APS assigns its entire interest in
this Agreement; (ii) PWE assumes in writing all of the APS obligations under this Agreement; (iii)
APS also assigns all of its rights and obligations under the Tolleson Agreement to PWE at the same
time as its assignment of this Agreement; and (iv) such assignment shall not become effective
until and unless PWE has become a party to the Arizona Nuclear Power Project Participation
Agreement. No assignment or delegation under this Section 10.3.1 will release the assigning Party
from its obligations under this Agreement unless the other Party consents to a release (such
consent not to be unreasonably withheld, conditioned or delayed). Any subsequent assignee of
PWEs rights and obligations under this Agreement shall be subject to all terms and conditions of
this Agreement, including, without limitation, the restrictions of this Section 10.3.1. 10.3.2 Assignment to Others. With the prior written consent of the other Party (such
consent not to be unreasonably withheld, conditioned or delayed), a Party may assign its rights or
delegate its duties under this Agreement at any time to any other PVNGS Participant, provided that
such Party assigns its entire interest in this Agreement and that its assignee assumes in writing
all of such Partys obligations under this Agreement. No assignment or delegation under this
Section 10.3.2 will release the assigning Party from its obligations under this Agreement unless
the other Party consents to a release (such consent not to be unreasonably withheld, conditioned or
delayed). Any assignee to whom the rights and obligations of this Agreement are assigned pursuant
to this Section 10.3.2 shall thereafter be subject to all terms and conditions of this Agreement,
including, without limitation, the restrictions of this Section 10.3.2. 10.4 Governing Law. This Agreement shall be governed by and interpreted in accordance
with the laws of the State of Arizona. 10.5 Attorneys Fees. Each Party shall bear its own attorneys fees, costs, and
expenses in case of a partition action or arbitration initiated under the provisions of Section
7.2. Should any Claim be brought by a Party against another Party arising out of this Agreement,
including any action for declaratory or injunctive relief, the prevailing Party shall be entitled
to reasonable. attorneys fees and costs and expenses of litigation and investigation, all as
actually incurred, including attorneys fees, costs and expenses of litigation and investigation
incurred in appellate proceedings or in any action or participation 11




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in, or in connection with, any case or proceeding under the United States or other bankruptcy
laws, and any judgment or decree rendered in any such action or proceedings shall include an award
thereof. 10.6 Counterparts. This Agreement may be executed by the Parties in any number of
separate counterparts, each of which when so executed and delivered shall be deemed an original,
but all such counterparts shall together constitute one and the same agreement. All signatures need
not be on the same counterpart. 10.7 Relationship of the Parties. The execution of this Agreement shall not create or
constitute a partnership, joint venture, entity or any form of business organization
between the Parties. IN WITNESS WHEREOF, the Parties have executed this Agreement to be effective as of the
Effective Date. ARIZONA PUBLIC SERVICE COMPANY, anArizona corporation,By
    
    /s/ James M. LevineIts Exec. VP, GenerationApproved as to form:By
    
    /s/ Karilee S. RamaleySALT RIVER PROJECT AGRICULTURALIMPROVEMENT AND POWER DISTRICT, anArizona agricultural improvement districtBy
    
    /s/ William P. SchraderIts PresidentApproved as to form:By
    
    /s/ Richard N. Morrison
 12