NV Energy, Inc. Operating Companies Open Access Transmission Tariff History of OATT Changes and Filings

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1 Early 2014 NAESB-WEQ Standards for Section 4.2 RM The Notice of Proposed Rulemaking in this docket was issued on July 18, Approximate Business Practices and Communication Comments have been filed. The NOPR proposes to incorporate by reference portions of the most recent version of the due date of Communication Protocols for Public standards (Version 003) adopted by the Wholesale Electric Quadrant ("WEQ") of the North American Energy Standards Board ("NAESB"). required Utilities Order No. xxx-xxxx (RM ). In addition, the Version 003 package also contains modifications to standards related to the Open Access Same-Time Information System compliance filing once this rulemaking is complete. ("OASIS"), as well as new standards related to Demand Side Management, Energy Efficiency and Smart Grid. 11/27/2013 Final Rule re Third-Party Provision Changes to ER /27/2013 pending On July 18, 2013, the FERC issued Final Rule Order No The Final Rule, which Order 784 of Ancillary Services; Accounting OATT according to FERC is designed to foster competition and transparency in ancillary services markets, addresses three main areas. Compliance and Financial Reporting for New Schedule 3 1. Reforms to regulations governing market-based sales of ancillary services to a public utility transmission provider that is purchasing to satisfy its Filing Electric Storage Technologies own OATT requirements to offer ancillary services to its own customers. pending Order No Reforms to the pro forma OATT related to speed & accuracy of resources used to provide Regulation & Frequency Response service. 3. Reporting requirements reforms (Form 1 / 3-Q / Account Keys) to better account for transactions associated with use of energy storage devices. The Order will require an OATT filing, accounting updates to the FERC Form 1 and 3-Q, and new OASIS postings. 11/27/2013 Compliance filing made. Filing makes changes to OATT Section 3 only on the first (of three) pages of that schedule. 11/7/2013 Final Rule re the Integration of Section 13.8 ER /12/2013 pending Final Rule Order No. 764 issued 06/27/2012-Docket No. RM Adopts most reforms Order 764 Variable Energy Resources Section 14.6 proposed in Nov2010 NOPR. Amends OATT to remove barriers to the integration of variable energy resources (VERs) (wind, solar, etc.). Key issues approved: Compliance Order No. 764 Exhibit A of >> Public utility transmission providers (that s us) must allow transmission customers to schedule transmission service at 15 minute intervals. Filing Attachment N This is designed to allow transmission customers, including those with naturally variable output, to avoid generator imbalance penalties. pending >> Entities may submit alternative proposals consistent with or superior to the 15-minute scheduling reform. >> The pro forma OATT, Larger Generator Interconnection Agreement (LGIA), must be amended to require new VERs to provide meteorological and forced outage data to a transmission provider that will use the data to conduct power production forecasting. >> Finally, Final Rule declined to adopt NOPR proposal to create schedule for generator regulation & frequency response service. 12/20/2012 The FERC issued Order No. 764-A extending the compliance filing date to November 12, /19/2013 The FERC issued Order No. 764-B clarifying certain issues but denying rehearing. No change in compliance date. 11/7/2013 Compliance filing made. Filing makes changes to OATT Section 13.8, Section 14.6, and Attachment N (Exhibit A). Proposed revisions adopt the pro forma language provided by the Commission in Order No Also, they are effective on 11/12/2013, per the terms of Order 764, even before the FERC has approved our filing. 11/13/2013 Filed a correction to Section 14.6 of the earlier compliance filing; assigned as Docket No. ER /31/2013 NV Energy Operating Company Schedule 1 - Scheduling ER /1/2014 pending On May 31, 2013, the company filed to change the OATT rates for the schedules listed etariff FERC Combined Rate Case Schedule 2 - Reactive to the left. This filing proposes a single-system rate and the elimination of the former zonal rate design. The proposed rate case Schedule 3 - Regulation & Frequency Response effective date of the new rates is the later of January 1, 2014 or the in-service date of the ON Line transmission line. pending Schedule 4 - Energy Imbalance The rate changes proposed for the OATT were: Previous SPPCO Previous NVPWR Proposed NVEOC Schedule 5 - Spinning Reserve Rate Category Rate Units (Zone A) Rate (Zone B) Rate Combined Rate Schedule 6 - Supplemental Reserve Schedule 1: Scheduling: MW per month $ $70.92 $99.15 Schedule 7 - Firm Point-To-Point Transmission Schedule 2: Reactive: MW per month $ $ $ Schedule 8 - Non-Firm Point-To-Point Transmission Schedules 3 & 11: Regulation: MW per month $9, $7, $8, Schedule 9 - Generator Imbalance Schedule 5: Spinning Reserve: MW per month $9, $7, $8, Schedule 10 - Loss Compensation Schedule 6: Supplemental Reserve: MW per month $7, $8, $7, Schedule 11 - Regulation & Frequency Response for Schedule 10: Loss Compensation Real Power Loss Factor 2.28% 1.26% 1.57% Generators Selling Outside of Control Area Schedules 7, 8, & H: Transmission: kw per month $3.74 $2.51 $3.57 Attachment H - Annual Transmission Revenue Requirement for Network Integration Transmission Page 1 of 16 12/2/2013

2 5/31/2013 NV Energy Operating Company Many ER /1/2014 pending On May 31, 2013, the company filed to change the OATT non-rate terms and conditions. etariff Change to the Non-rate Terms & This filing is being made in connection with the proposed consolidated transmission rate filing, shown above. The proposed effective date of the non-rate Conditions of the OATT new rates is the later of January 1, 2014 or the in-service date of the ON Line transmission line. This filing provides for changes in five key areas: terms & First, the Revised OATT reflects a single, consolidated transmission system operated by a single transmission provider, as opposed to two conditions systems operated by two separate transmission providers. pending Second, the Revised OATT revises the terms and conditions for transmission service offered pursuant to a retail access program. Third, the Revised OATT eliminates all provisions on Capacity-Based Network Service. Fourth, the Applicants submit a revision to Section 19.1 with regard to when requests to study conditional firm and planning redispatch options should be made to ensure they are included in system impact studies without unnecessarily delaying the study process. Fifth, the Revised OATT includes the pro forma language provided by the Commission in Order No Finally, the Revised OATT also incorporates certain of the terms and conditions from filings pending before the Commission, such as Attachment K, N, and O The Applicants will amend the Revised OATT as necessary based on the Commission s action in those cases. 5/31/2013 NV Energy Operating Company N/A N/A EC /31/2013 pending On May 31, 2013, the company filed to requests Commission authorization for an internal pending Section 203 Application for Approval corporate reorganization under which Sierra will merge into Nevada Power, the surviving entity, which will be renamed NV Energy Operating of an Internal Reorganization Company, doing business as NV Energy. The requested effective date is the latter of December 31, 2013, or the in-service date of the One [Note: not a direct OATT change, but closely interrelated to Nevada Transmission Line (currently anticipated by December 31, 2013). the two filings above: Docket Nos. ER & ER ] 5/10/2013 Order No Compliance Filing. Attachment K none ER /31/9998 pending This compliance filing was submitted early (the FERC-adjusted due date was July 10, 2013). etariff Revised Attachment K for interregional transmission coordination procedure. This is a combined effort of almost all of the Western Interconnection electric utilities. compliance Revised Attachment K to include interregional cost allocation method. The filing is designed to address all the requirements of Order No for interregional filing transmission planning and cost allocation. 12/31/2012 Revisions to Schedule 4 - Schedule 4 ER /22/2013 pending The NV Energy Operating Companies are proposing two minor changes to Schedule 4 - the etariff Energy Imbalance Service ER13-44 Energy Imbalance Schedule. Both changes deal with the calculation of the Market Price Proxy that sometimes serves as the Schedule 4 basis for Incremental and Decremental Energy Cost. Schedule 9 - Generation Imbalance will also be impacted, as it Revisions incorporates by reference the Schedule 4 definitions of Transmission Provider s Incremental Energy Cost and pending Transmission Provider s Decremental Energy Cost. However, no changes to the text of Schedule 9 are proposed. Order Issued: 3/1/2013 On March 1, 2013 the Commission issued an Order Rejecting in Part, Accepting in Part and Suspending Proposed Rates, Granting Complaint in Part, Establishing Hearing and Settlement Judge Procedures and Consolidating Proceedings. This filing will enter hearing and settlement proceedings before resolution. Compliance Filing: 4/1/2013 On April 1, 2013 as directed in the March 1 Order, the NV Energy Operating Companies revised Schedule 4 to remove the ER transmission basis in its Schedule 4 provisions with respect to the calculation of the Market Price Proxy ( MPP ). The NV Energy Operating Companies request that the Commission accept the revised Schedule 4 for filing as compliant with the March 1 Order, and effective March 1, 2013, subject to the outcome of the proceeding set forth in Docket No. ER Note that a new Docket Number was assigned for this particular compliance filing. Page 2 of 16 12/2/2013

3 Compliance Filing Accepted: 7/10/2013 On July 10, 2013, FERC issued a Letter Order accepting our April 1st filing compliance with the March 1 Order of removing ER the transmission cost basis from the Energy Imbalance Provisions in Schedule 4 of the NV Energy OATT. Note that while this closes this particular compliance issue, the larger Docket No. ER remains outstanding. However, we did post an updated OATT to reflect the acceptance of this limited compliance filing, effective March 1, Offer of Settlement Filed: 7/10/2013 Offer of Settlement filed to resolve all remaining issues in this filing. This settlement is unopposed. Among other things, the ER settlement changes the proposed effective date to January 22, 2013 (from the originally requested March 1, 2013). ER13-44 This settlement addresses the originally filed issues to: (1) adjust one component ofthe calculation of the Market Price Proxy ( MPP ); and (2) update the transmission cost basis included in the calculation of Schedule 4 imbalance charges/payments. 12/31/2012 Revisions to Attachment N Attachment N ER /1/2013 7/10/2013 The purpose of this filing is to reform the OATT generation interconnection procedures to etariff (Large Generator Interconnection Attachment O address unique siting issues in the state of Nevada, improve the efficiency of the interconnection process, and decrease future LGIA-SGIA Procedures) and Attachment O queue backlogs. The modifications to NV Energy s interconnection process will be implemented by: (1) creating a Revisions (Small Generator Interconnection Pre-Application Process; (2) eliminating current Feasibility Study process; & (3) creating a biannual queue cluster window for Procedures) large generator interconnection requests based on geographic location & completion of the Pre-Application Process. Order Issued: 3/1/2013 On March 1, 2013 the Commission issued an Order Conditionally Accepting in Part and Rejecting in Part Tariff Revisions. A compliance filing is due within 30 days to address this order. Compliance Filing: 4/2/2013 On April 2, 2013 as directed in the March 1 Order, the NV Energy Operating Companies have filed revisions to the Large ER Generator Interconnection Procedures ( LGIP ) and Small Generator Interconnection Procedures ( SGIP ) in accordance with the Commission s direction in the March 1 Order. There were several changed to be made to each of the Attachments. We requested that these changes be accepted and made effective on March 1, Note that a new Docket Number was assigned for this particular compliance filing. Updated Compliance Filing: 5/3/2013 On May 3, 2013, the Company filed several updates and corrections to its earlier compliance filing, made on April 2, ER This correction filing was made under the new Docket Number issued for just this compliance filing. Updated Compliance Filing Accepted: 7/10/2013 On July 10, 2013, FERC issued a Letter Order accepting our April 2nd filing (as corrected on May 3rd) of our compliance with ER the March 1 Order. This Letter Order not only closes Docket No. ER but also concludes the original Docket No. ER ER as well. This filing is, thus, complete, and an updated OATT was posted on OASIS to reflect these changes. 10/30/2012 FERC Rate Case for Sierra Pacific Schedule 1 - Scheduling ER /1/2013 8/29/2013 On October 30, 2012, the Sierra Pacific Power Company filed at FERC to amend its Zone A etariff Power Company (OATT Zone A) Schedule 2 - Reactive ER13-29 rates for the schedules listed to the left. The original proposed effective date for these changes was January 1, On rate case Schedule 3 - Regulation & Frequency Response December 31, 2012, the Commission issued an Order which accepted the rate for Schedules 1 and 10 effective January 1, Schedule 5 - Spinning Reserve 2013 (subject to refund), and postponed the effective dates for the remaining schedules until June 1, 2013 (which will also be Schedule 6 - Supplemental Reserve subject to refund) pending a settlement and/or hearing. Schedule 7 - Firm Point-To-Point Transmission The rate changes proposed for the OATT were as follows: Schedule 8 - Non-Firm Point-To-Point Transmission SPPC (Zone A) Rate Category Rate Units Previous Rate Proposed Rate Settlement Rate Schedule 10 - Loss Compensation Schedule 1: Scheduling MW per month $ $ $ Schedule 11 - Regulation & Frequency Response for Schedule 2: Reactive MW per month $ $ $ Generators Selling Outside of Control Area Schedules 3 & 11: Regulation MW per month $6, $9, $8, Attachment H - Annual Transmission Revenue Schedule 5: Spinning Reserve MW per month $6, $9, $8, Requirement For Network Integration Schedule 6: Supplemental Reserve MW per month $4, $7, $7, Page 3 of 16 12/2/2013

4 Transmission Service Schedule 10: Loss Compensation Real Power Loss Factor 2.34% 2.28% 2.28% Schedules 7, 8, & H: Transmission kw per month $2.84 $3.74 $3.21 6/1/2013 An updated OATT was posted on OASIS to reflect the new rates that went into effect 6/1/ /27/2013 A settlement in the case, resolving all outstanding issues & unopposed by all interveners, was filed with the Commission. In addition to the settlement, a request for expedited treatment to allow us to put the settlement rates into effect beginning June 1st, 2013 was filed. The settlement rates are shown in the table above. 7/2/2013 An order was issued in Dockets ER & ER granting the request to put the settlement rates into effect beginning June 1st, /29/2013 Order issued approving the settlement and ordering refunds. This concludes this filing. 10/1/2013 Refund report filed in connection with the settlement approval. This REALLY concludes this filing. 10/30/2012 FERC Rate Case for Nevada Schedule 1 - Scheduling ER /1/2013 pending On October 30, 2012, the Nevada Power Company filed at FERC to amend its Zone B etariff Power Company (OATT Zone B) Schedule 2 - Reactive ER13-28 rates for the schedules listed to the left. The original proposed effective date for these changes was January 1, On rate case Schedule 3 - Regulation & Frequency Response December 31, 2012, the Commission issued an Order which accepted the rate for Schedules 1 and 10 effective January 1, pending Schedule 5 - Spinning Reserve 2013 (subject to refund), and postponed the effective dates for the remaining schedules until June 1, 2013 (which will also be Schedule 6 - Supplemental Reserve subject to refund) pending a settlement and/or hearing. Schedule 7 - Firm Point-To-Point Transmission The rate changes proposed for the OATT were as follows: Schedule 8 - Non-Firm Point-To-Point Transmission NPC (Zone B) Rate Category Rate Units Previous Rate Proposed Rate Settlement Rate Schedule 10 - Loss Compensation Schedule 1: Scheduling MW per month $ $70.92 $70.92 Schedule 11 - Regulation & Frequency Response for Schedule 2: Reactive MW per month $ $ $ Generators Selling Outside of Control Area Schedules 3 & 11: Regulation MW per month $6, $7, $7, Attachment H - Annual Transmission Revenue Schedule 5: Spinning Reserve MW per month $6, $7, $7, Requirement For Network Integration Schedule 6: Supplemental Reserve MW per month $3, $8, $7, Transmission Service Schedule 10: Loss Compensation Real Power Loss Factor 1.32% 1.26% 1.26% Schedules 7, 8, & H: Transmission kw per month $1.40 $2.51 $1.88 6/1/2013 An updated OATT was posted on OASIS to reflect the new rates that went into effect 6/1/ /11/2012 Order No Compliance Filing. Attachment K Attachment K ER /31/9998 3/22/2013 This is the big compliance filing completely rewriting our Attachment K to comply with FERC etariff Revised Attachment K for local & regional planning. Conditional Order No Several interventions and protest were received in the filing. On December compliance Revised Attachment K to include regional cost allocation method. 17, 2012 we filed a Motion For Leave To Answer And Answer of the WestConnect filing Jurisdictional Utilities in response to the various protests. pending FERC issued an order in this filing on March 22, 2013 that conditionally approved this filing of a new Attachment K, subject to a further compliance filing 120 days from the date of the this order. FERC concluded that they partially comply with the requirements of Order No FERC offered guidance to public utility transmission providers in the region and directed further compliance filings that: --->>> State that WestConnect has an obligation to identify transmission solutions in the regional transmission planning process that more efficiently or cost-effectively meet transmission needs driven by reliability and/or economic considerations or by public policy requirements. --->>> Address Order No s requirement to consider transmission needs driven by public policy requirements by including clear procedures for stakeholder input to identify transmission needs driven by such requirements & stakeholder input in evaluating potential solutions to those needs. --->>> Provide that regional cost allocations are binding on identified beneficiaries. Page 4 of 16 12/2/2013

5 ER /20/2013 Compliance filing made to address the issues in the March 22, 2013 Order, some of which are highlighted directly above. Also note that the name "NV Energy" was used throughout this compliance filing in order to comply with the FERC's directive in its August 5, 2013 Order Accepting in Part, 144 FERC 61,105 at P 70 (Aug. 5, 2013). 7/18/2011 Compliance filing to address the Section 59.1 none ER /1/2011 9/12/2011 Compliance filing to revise OATT Attachment C - Methodology To Assess Available Transfer etariff Notice of Deficiency received in the Capability (ATC). This revision filed to address changes requested by the FERC in their Data Request associated with the Filing Attachment C filing directly below. Notice of Deficiency in the filing directly below (changes mandated by FERC Order Nos. 729, 729-A, and 729-B). The effective date of these proposed new changes remains the same as the previous filing: 4/1/2011. The filing was accepted by the FERC on 09/12/2011 as filed (as amended), without change. 3/2/2011 Compliance filing to address the Section 59.1 none ER /1/2011 6/17/2011 Compliance filing to revise OATT Attachment C - Methodology To Assess Available Transfer etariff following FERC Orders: (requested) (with Capability (ATC). This revision filed to address changes mandated by FERC Order Nos. Filing FERC Order No. 729, November 24, conditions 729, 729-A, and 729-B. FERC Order No. 729-A, May 5, pending) On 6/17/2011 we received a Notice of Deficiency from the FERC outlining several FERC Order No. 729-B, July 15, items that were missing from our original filing. We have 30 days to respond, so a Revised OATT Attachment C - Methodology To Assess Available Transfer Capability (ATC) response will be due no later than 7/17/2011 (or 7/18/2011, since the 17th is on a Sunday). We made that filing via etariff on 7/18/ /21/2010 FERC Order No. 676-E (RM ) Section 4.2 none ER /21/ /22/2010 Compliance filing to incorporate by reference the latest edition of the NAESB-WEQ business etariff NAESB-WEQ Standards for practice rules. This modified Section 4.2 of the OATT. No specific date was mandated for the Filing Business Practices and Communication Protocols for Public compliance filing other than it had to be made within a year of the date of the Order 676-E. Utilities Order No. 676-E (RM ) was dated November 24, The filing was accepted by the FERC on 11/22/2010 as filed, without change. 10/21/2010 FERC Order No. 739 (RM10-22) Section 23.1 none ER /1/ /8/2010 Compliance filing to permanently lift the price cap for all electric transmission customers etariff Promoting a Competitive Market for reassigning transmission capacity, effective October 1, This was done on an Filing Capacity Reassignment experimental basis for two years. The FERC has now decided that the cap may be FERC Order No. 739 (RM10-22) was dated September 20, permanently lifted. The filing was accepted by the FERC on 12/08/2010 as filed, without change. 9/29/2010 etariff Compliance Baseline Filing none none ER /29/ /27/2010 This was the big project to get the OATT into "etariff compatible" format and file it using etariff No substantive changes made at all. the new etariff filing system. While there were NO substantive changes made to the OATT as a part of this process, the printed OATT does look Filing This filing was made solely to quite a bit different due to the requirements of the FERC Order 714 etariff filing process. For example, there are no longer unified sheet (or page) comply with the etariff filing numbers throughout the tariff, although certain sections have their own page numbers. Also, as part of the Order 714 process, all the old, process of FERC Order No sheet-based headers and footers were eliminated. Also, all those old, sheet-based blank pages with "Held for Future Use" were eliminated. There This huge filing was given FERC Accession No was one significant benefit, though: the size of the OATT was reduced from 667 pages to 519 pages, which is pretty amazing when you consider Page 5 of 16 12/2/2013

6 that there were no content changes at all. The filing was accepted by the FERC on 10/27/2010 as filed, without change. This is the dividing line between the new FERC Order No. 714, etariff section-based OATT and the old FERC Order No. 614, sheet-based OATT. With the etariff compliance filing made above, the look of the OATT changed substantially. Gone are the old sheet-based headers and footers. Gone are the old sheet-based artificial page breaks to preserve sheet position. Gone are the old "This Page Held for Future Use" placeholder pages. Gone is the old, unified, front-to-back sheet (or page) numbering. Now we are supposed to work with the OATT using sections only, not page or sheet numbers. 4/15/2010 FERC Order No. 676-F (RM05-5) none none RM N/A N/A This is noted here because most of these types of orders required an OATT compliance filing. Not a filing date - NAESB-WEQ Standards for Business Practices However, Order 676-F applies to demand response products and services in this was the and Communication Protocols for Public Utilities wholesale energy markets only (i.e. RTOs and ISOs). So, in this instance, no filing is needed. Order issue date. NOT a Compliance Filing - Informational Note Only 2/1/2010 Name Change Filing Cover Sheet none ER /31/2010 3/3/2010 This is a housekeeping filing to change the name of the OATT from the Sierra Pacific 172,195,206C,227, Resources Operating Companies OATT to the NV Energy, Inc. Operating Companies OATT. Note 253A - 253W (24 sheets), that EVERY header of the entire 600+ page OATT was changed to reflect the new name of the OATT. 253Y - 253DD (6 sheets), However, the pages listed here are the ones that had the Sierra Pacific Resources (or SPR) name 253FF - 253JJ (5 sheets), embedded in the page somewhere, and that we had to change. 257AA The filing was accepted by the FERC on 3/3/2010 without change. (41 sheets) --> This total does not include all the remaining sheets that just needed the header name changed. 9/14/2009 Attachment K-Transmission 253I 253I.01 OA /7/2007 3/3/2010 This compliance filing was required by the FERC Order on Compliance Filings issued July Planning Process Compliance (1 sheet) (1 sheet) 16, 2009 in Docket No. OA , 128 FERC 61,063. The compliance filing explains how we will Filing analyze and select the preferred solution from competing alternatives so as to make it clear that transmission, generation, and demand resources are considered on a comparable basis. The filing was accepted by the FERC on 3/3/2010 without further changes. 9/30/2008 FERC Order No. 676-D (RM05-5) none none RM N/A N/A This is noted here because most of these types of orders required an OATT compliance filing. Not a filing date - NAESB-WEQ Standards for Business Practices RM However, Order 676-D simply clarifies the implementation dates for two previous items: NAESB Standard this was the and Communication Protocols for Public Utilities WEQ Transmission Loading Relief-Eastern Interconnection (TLR) NAESB Standard WEQ Public Order issue date. NOT a Compliance Filing - Informational Note Only Key Infrastructure (PKI) So, in this instance, no filing is needed. 8/4/2008 General Rate Case Zone A 165,186,189 ER /23/2007 1/15/2009 Note this is not an actual filing. This is the date that the Commission accepted our filing of (not a filing) Rate Change 190,244 the uncontested Zone A rate case settlement back on September 7, The original case was filed back on (Not an actual filing-see (5 sheets) September 14, The new rates that take effect - effective retroactive to November 23, are the comments at right.) following: point-to-point and network rates on Sheet No. 186 (Schedule 7), Sheet Nos. 189 & 190 (Schedule 8), and Sheet No. 244 (Attachment H). Note that the new Schedule 1 rates on Sheet No. 165 took effect back on November 16, Page 6 of 16 12/2/2013

7 12/13/2008 FERC Order No. 676-C (RM05-5) 31A, none ER /1/2008 2/18/2009 This was a minor compliance filing to make a correction to the original filing, which was NAESB-WEQ Standards for (1 sheet) made on 9/17/2008. This compliance filing is made to state in the OATT - specifically - Business Practices and Communication that we have received waiver of Order No. 676-C requirements related to the standard Protocols for Public Utilities for Transmission Loading Relief - Eastern Interconnection. The filing was accepted by the FERC on 2/18/2009 without changes. 10/15/2008 Attachment K-Transmission 253A-253CC 253DD-253KK OA /7/2007 7/16/2009 On July 16, 2008 the Commission accepted the changes filed in the December 7, 2007 Planning Process Compliance (29 sheets) (8 sheets) compliance filing subject to a further compliance filing. What was interesting about the Compliance Order is Filing that a single order was issued to cover the Attachment K filings of several utilities. The utilities were grouped together because of their membership in both the Southwest Area Transmission Planning group (SWAT) and WestConnect. The utilities grouped together in this order included the following: El Paso Electric Company UNS Electric, Inc. Public Service Company of New Mexico Arizona Public Service Company Tucson Electric Power Company SPR Operating Companies On October 15, 2008 the Company made a compliance filing addressing all of the issues raised in the Compliance Order. The filing was accepted by the FERC on 7/16/2009. A further compliance filing will be required in mid-september. That compliance filing must explain how we will analyze and select the preferred solution from competing alternatives so as to make it clear that transmission, generation, and demand resources are considered on a comparable basis. 9/17/2008 FERC Order No. 676-C (RM05-5) 3,31A, 31D ER /1/ /13/2008 Filing to incorporate by reference the latest edition of the NAESB-WEQ business NAESB-WEQ Standards for 31B,31C (1 sheet) practice rules. Business Practices and (4 sheets) The filing was accepted by the FERC on 11/13/08. We have a minor compliance filing Communication Protocols for Public Utilities to make on 12/13/2008 to note our exemption from the Transmission Loading Relief-Eastern Interconnection standard in our OATT. In the acceptance order the Commission specifically assigned effective dates to specific standards, as listed here: 10/1/ >---->----> Business Practices for OASIS, Business Practices for OASIS Standards & Communication Protocols, OASIS Data Dictionary, Gas/Electric Coordination, Public Key Infrastructure, and Business Practices for OASIS Implementation Guide 8/28/ >---->----> Coordinate Interchange, Area Control Error Equation Special Cases, Manual Time Error Correction, and Inadvertent Interchange Payback 9/8/2008 Order 890-B Compliance Filing 19,105,108, none OA /8/ /14/2008 OATT reform continues with yet another "interpretation and clarification" of OATT Reform 109,109B Order 890. This filing removes the requirement that a reserve sharing program be (5 sheets) Commission-approved, adds the language except for purposes of fulfilling obligations under a reserve sharing program to selected sections, and makes other language changes. The filing was accepted by the FERC on 11/14/08 without changes. 9/2/2008 General Rate Case Zone A 186,189 none ER /23/2007 1/15/2009 This was the actual filing of the uncontested settlement in this Zone A (SPPC) General Rate Change Settlement 190,244 Rate Case. When the FERC approves this filing, the new rates that take effect are the Page 7 of 16 12/2/2013

8 Agreement Compliance Filing (4 sheets) following: point-to-point and network rates on Sheet No. 186 (Schedule 7), Sheet Nos. 189 & 190 (Schedule 8), and Sheet No. 244 (Attachment H). Note that the new Schedule 1 rates on Sheet No. 165 took effect back on November 16, The filing was accepted by the FERC on 1/15/09 without further changes. 8/11/2008 Filing to Address Issues of: 1,2,9,12, 109A.1,109C, ER /10/ /10/2008 This filing is to address issues similar to those raised in a recent Arizona Public Service Control Area ID, Bookouts, 24,26,27, 198B,198C, Company, 121 FERC 61,246 (2007), Puget Sound Energy, 120 FERC 61,232 Rollover Rights, & Other Issues 104, D,198E, (2007) and Entergy Services, 120 FERC 61,042 (2007) filings. Topic areas include (9 sheets) (6 sheets) the identification of the source control area when designating network services, the use of bookouts, the incorporation of network resource characteristics by reference, revision to rollover rights language, and other issues. The filing was accepted by the FERC on 10/10/08 without changes. 5/16/2008 Order 890 OATT Reform 26,27,53,58, 187A,257AA OA /1/ /10/2008 The final paragraph of the April 17, 2008 Order Conditionally Accepting Compliance Filing Compliance Filing 59,188,257A, (2 sheets) (for Sheets 26 & 27) ( Order 890 Compliance Order ) required the Nevada Companies to submit, within B,257C, days of that order, a compliance filing to make various changes outlined in the Order D,257E, 7/13/ /10/2008 Compliance Order. The areas addressed in the Order include making several changes to 257F,257G (for the remaining sheets) the Attachment L-Creditworthiness Procedures, make changes to unreserved use (13 sheets) penalties, file a new Attachment J-Procedures for Addressing Parallel Flows, and to return the rollover rights language to where it was prior to Order 890, pending acceptance of the Nevada Companies' Attachment K-Transmission Planning Process. The new Attachment J-Procedures for Addressing Parallel Flows was filed already on March 17, 2008 in conjunction with the Nevada Companies' Order 890-A OATT Reform Compliance Filing, so it was no longer needed to be filed with this compliance filing. All other ordered changes were made, however. 4/15/2008 General Rate Case Zone A 186,189 none ER /15/2008 1/15/2009 Note this is not an actual filing. Rather, this is the date that these new rates - filed back on (not a filing) Rate Change 190,244 September 14, take effect. The new rates that take effect today are the following: (Not an actual filing-see (4 sheets) point-to-point and network rates on Sheet No. 186 (Schedule 7), Sheet Nos. 189 & 190 comments at right.) (Schedule 8), and Sheet No. 244 (Attachment H). Note that the new Schedule 1 rates on Sheet No. 165 took effect back on November 16, /11/2008 Attachment C-Available Transfer 205,206, 205A,205B, OA /11/2008 9/12/2008 Paragraph 12 of March 12, 2008 Order On Compliance Filing ( ATC Compliance Order ) Capability Compliance Filing 206A,206B, 205C,206E.1, required the Nevada Companies to submit, within 30 days of that order, a compliance filing 206C,206D, 206E.2,206E.3, to address certain issues. These issues include: to provide a working link to mathematical 206E,206F, 206H.1,206M algorithms, provide a clear list of assumptions used for TTC calculations, explain the set 206G,206H, (8 sheets) aside for non-oatt customers, and present a detailed explanation of assumptions used to 206I,206J,206K,206L calculate TRM. We also, at this time, took the opportunity to add a table of contents and (14 sheets) reformat the Attachment to make topic headings more clear and improve the structure. The filing was made on April 11, 2008 and the changes were made effective that same date. On September 12, 2008 the Commission accepted the changes filed in the April 11, 2008 Page 8 of 16 12/2/2013

9 compliance filing without further modification. That closes this series of filings, which began with the original filing on September 11, 2007 which resulted from OATT reform Order /2/2008 Imbalance Penalty Revenue 177A,177B, none OA /2/2008 5/30/2008 Paragraph 12 of March 3, 2008 Order On Compliance Filing ( Imbalance Compliance Compliance Filing 196C,196D Order ) required the Nevada Companies to submit, within 30 days of that order, a (4 sheets) compliance filing to make the definition of non-offending customers less restrictive and to calculate penalty revenues on an hourly (rather than monthly) basis. We also made a correction to the language, changing the term "Hourly Energy Proxy" to "Transmission Provider's Incremental Energy Cost." The filing was made on April 2, 2008 and the changes were made effective that same date. On May 30, 2008 the Commission accepted the changes filed in the April 2, 2008 compliance filing without further modification. That closes this series of filings, which began with the original filing on April 14, 2007, continued with a compliance filing on August 10, 2007 and then another (and final) compliance filing on April 2, /17/2008 Order 890-A OATT Reform 10,19,22,27, 28A,118A OA /17/ /15/2008 On March 17, 2008, the Sierra Pacific Resources Operating Companies filed with the Compliance Filing 28,31,31A,34, (2 sheets) FERC the OATT Compliance changes to the OATT stemming from FERC Order 890-A 46,47,56,64,64A,70,74,77, OATT reform. Order 890-A was issued December 28, In addition, the new 79,80A,93,94,109B,117, Attachment J-Procedures for Addressing Parallel Flows was filed which was originally to 118,187,188,191,202A be filed on July 13, 2007 as a result of the original Order 890-OATT Reform. The Order (27 sheets) 890-A changes were effective March 17, A,145,247,248 7/13/ /15/2008 The original Order 890 change - Attachment J-Procedures for Addressing Parallel Flows - (4 sheets) (for the 4 Attachment J Sheets) was made effective July 13, The filing was accepted by the FERC on 10/15/08 without changes. However, FERC Auditor Bryan Dunn ( ) did find an error that was not big enough to deny acceptance, but he did request that we correct the error. Revised Sheet No. 56 contains the ordered revisions but shows an effective date of 7/13/2007 and a designation of "1st revised". However, the proper effective date should be 3/17/2008 and the designation should be "2nd revised". 12/7/2007 Attachment K - Transmission 253A 253B-253CC OA /5/2008 7/17/2008 On December 7, 2007, the Sierra Pacific Resources Operating Companies made an Planning Process (1 sheet) (28 sheets) OATT compliance filing of a new OATT Attachment K Transmission Planning Process as required in FERC OATT Reform Order 890. The proposed new OATT Attachment K is 29 pages in length and consists of modified Sheet Number 253A and new Sheet Numbers 253B through 253CC. The changes were made effective 60 days from the date of the filing-february 5, On July 17, 2008 the Commission accepted the changes filed in the February 5, 2008 compliance filing subject to a further compliance filing. What was interesting about the Compliance Order is that a single order was issued to cover the Attachment K filings of several utilities. The utilities were grouped together because of their membership in both the Southwest Area Transmission Planning group (SWAT) and WestConnect. The utilities grouped together in this order included the following: El Paso Electric Company UNS Electric, Inc. Public Service Company of New Mexico Arizona Public Service Company Tucson Electric Power Company SPR Operating Companies 9/14/2007 General Rate Case Zone A 165,186,189 none ER /15/2009 On September 14, 2007, the Sierra Pacific Resources Operating Companies filed at 190,244 Point-to-point & network rates FERC to amend its Zone A rates for the following schedules: (5 sheets) on Sheet 186 (Schedule 7), Schedule 1 - Scheduling, System Control, and Dispatch Service, Sheets 189 & 190 (Schedule 8), Schedule 7 - Long-Term Firm & Short-Term Firm Point-to-Point Transmission Service, Page 9 of 16 12/2/2013

10 and Sheet 244 (Attachment H): 4/15/2008 Schedule 8 - Non Firm Point-to-Point Transmission Service, and Attachment H - Network Integration Transmission Service. Schedule 1 rates on Sheet 165: 11/16/2007 The original proposed effective date for these changes was November 15, On November 13, 2007, the Commission issued an Order which accepted the rate for Schedule 1 effective November 16, 2007 (subject to refund), and postponed the effective dates for the remaining schedules until April 15, 2008 (which will also be subject to refund) pending a settlement and/or hearing. The filing of the final uncontested settlement in this case was on 9/2/2008. That settlement was accepted by the FERC on 1/15/09 without further changes. At the conclusion of this rate case, the rates had changed as follows: Rates for SPPC (Zone A) Rate Category Rate Units Previous Rate New Rate Schedule 1: Scheduling, System Control & Dispatch Service: kw per month $ $ Schedule 7 & 8: Firm & Non-Firm Point-to-Point Transmission Service: kw per month $2.88 $2.84 9/14/2007 CBNS-Update 126,130D,130E 130D.01 ER /13/ /28/2007 On September 14, 2007, the Sierra Pacific Resources Operating Companies made a (3 sheets) (1 sheet) compliance filing as directed by the FERC in their Capacity Based Network Service ( CBNS ) order to make several selected modifications to the new CBNS in consultation with their transmission customers. Those proposed modifications are contained in OATT Sheet Numbers 126, 130D, 130D.01 (a new sheet), and 130E. As directed in the FERC CBNS Order the changes were made effective July 13, On November 28, 2007 the FERC accepted the compliance changes as filed. 9/11/2007 Attachment C - ATM Calculations 205, A - 206L OA /11/2007 3/12/2008 On September 11, 2007, the Sierra Pacific Resources Operating Companies made an (2 sheets) (12 sheets) OATT compliance filing of a new OATT Attachment C Methodology to Assess Available Transfer Capability as required in FERC OATT Reform Order 890. The proposed new OATT Attachment C is 14 pages & consists of modified Sheet Numbers 205 and 206 and new Sheet Numbers 206A through 206L. As provided for in that order, the changes were made effective on the same day as the filing: September 11, On 3/12/08 the Commission conditionally accepted our Attachment C subject to us making a compliance filing within 30 days (on Friday, April 11, 2008) to make requested changes. These changes are to correct certain items and to add certain clarifications and explanations. We made that filing - which changed or added 22 tariff sheets - on April 11, /29/2007 Loss Compensation Schedule , A ER /1/ /4/2007 This change to OATT Schedule 10 - Loss Compensation Service provides an alternative (2 sheets) (1 sheet) settlement option to Transmission Customers who would prefer to settle Real Power Losses financially as opposed to supplying via Physical Delivery the Real Power Losses necessary to compensate the Transmission Provider for such losses. Thus, there are now three settlement options in the OATT for Real Power Losses: 1) supplying losses via physical delivery, 2) arranging for a third party to supply losses via physical delivery, or 3) financial settlement, which is the new option available with this filing. That filing was accepted by the FERC on 10/4/07 without change. 8/10/2007 Imbalance Penalty Charges 177A,196C 177B,196D OA /13/2007 3/3/2008 Paragraph 12 of July 13, 2007 Order Conditionally Accepting Proposed Variations From Compliance Filing (2 sheets) (2 sheets) The Pro Forma Open Access Transmission Tariff designated Docket No. OA07-2 ( Imbalance Order ) required the Nevada Companies to submit, within 30 days of that order, a compliance filing proposing a mechanism for crediting imbalance penalty revenues to all non-offending customers and to the Nevada Companies on behalf of their own customers in accordance with the requirements of Order No On 3/3/08 the Commission conditionally accepted those changes, subject to us making a compliance filing within 30 days (on Page 10 of 16 12/2/2013

11 Wednesday, April 2, 2008) to, among other things, make the definition of non-offending customers less restrictive. We made that filing - which changed or added 4 tariff sheets - on April 2, /27/2007 Capacity-Based Network Service 98 none ER /13/2007 9/12/2007 On July 27, 2007, the Sierra Pacific Resources Operating Companies made a Termination Date Change (1 sheet) compliance filing as directed by the FERC in their CBNS order to change the termination date from the originally proposed December 31, 2012 to the new July 12, As directed in the FERC Order that change was made effective July 13, This change was accepted by the FERC on September 12, /13/2007 Order 890 Reform 1-8,10,10A,11, 64A,80A,86A OA /13/2007 4/17/2008 On July 13, 2007, the Sierra Pacific Resources Operating Companies filed with the 13,15,16,19,22, 86B,109A,109B, FERC the OATT Compliance Filing making numerous changes to the OATT all 24,26-31,31A, 202A-202D, stemming from FERC Order 890. These were all direct compliance changes from that 33,34,41,46-51, 253A,257A-G order. All changes were effective July 13, 2007, as directed by the FERC in Order ,56,61,62,64, (18 sheets) On 4/17/08 the Commission conditionally accepted our Attachment C subject to us making a compliance filing 66,70,72,74,77-80,81,85,86,93-95, within 30 days (on Friday, May 16, 2008) to make requested changes. These changes are to correct certain 97,99-101,104,105,108,109,111,112, items and to add certain clarifications and explanations. We made that filing - which changed or added 15 tariff 115,118,120,129,166,168,178,182,205 sheets - on May 16, (71 sheets) 5/16/2007 Capacity-Based Network Service 1,7,12,16,60, 130A-130H ER /13/2007 7/13/2007 On May 16, 2007, the Nevada Companies filed revisions to their OATT that would 98,99,126,130 (8 sheets) implement an optional Capacity-Based Network Service ("CBNS") (9 sheets) 4/14/2007 Schedule 4 Energy Imbalance A none OA07-2 7/13/2007 7/13/2007 Compliance with the Order No. 890 Optional Implementation FPA Section 205 filing Service and (8 sheets) guidelines. The Optional Implementation FPA Section 205 filing guidelines and Para. 139 Schedule 9 Generation C of the Final Rule allow previously approved variations to remain in effect subject to a Imbalance Service (7 sheets) demonstration that such variations continue to be consistent with or superior to the revised Final Rule pro forma OATT. This compliance filing preserved with minor modifications to update them for Order 890 requirements the Companies existing schedules as follows: - Schedule 4 Energy Imbalance Service, and - Schedule 9 Generation Imbalance Service. The minor modifications made to update them for Order 890 requirements were to add language to both schedules in order to conform to the reforms adopted in Order No. 890 regarding non-generation resources and double billing, and to Schedule 9 to provide for exceptions required for intermittent resources. On 7/13/07 the Commission accepted those changes, subject to us making a compliance filing within 30 days (which we made on August 14, 2007) to propose a mechanism to distribute imbalance charge revenues to non-offending customers. 12/6/2006 Housekeeping Changes to 200,204, none ER /5/2007 1/10/2007 The revisions are housekeeping in nature and consist of replacement of certain contact Update Company Contact 220,259 information in the OATT that needs to be updated to reflect current Company Information (4 sheets) responsibilities. The changes proposed are: Modification of the contact information on Sheet Numbers 200, 204, 220 and 259 to reflect the correct, current contact information. 9/12/2006 FERC Order No. 676 (RM05-5) ER /24/2006 The purpose of this filing is two-fold: NAESB-WEQ Standards for 2,19,31 31A,31B,31C For Order to incorporate by reference certain standards promulgated by the Wholesale Electric Page 11 of 16 12/2/2013

12 Business Practices and (3 sheets) (3 sheets) 676 changes: 7/1/2006 Quadrant ( WEQ ) of the North American Energy Standards Board ( NAESB ) in Communication Protocols Order No. 676 in Docket RM , and for Public Utilities 486,487,488, 488A,488B, For Order to make modifications to the pro forma small generator interconnection study agreements and 489,490,491, 488C,493A, 2006-B changes: 8/28/2006 and to correct the small generator interconnection agreement table of contents as outlined per Order No B in 492,493,494, 493B,497A, in Order No B in Docket RM This refers to Attachment O, and we were Docket No. RM ,496,497, 497B required to file, per this order, new: 498,499,501, (7 sheets) 1. Feasibility Study Agreement, System Impact Study Agreement, (16 sheets) 3. Facilities Study Agreement, and 4. SGIA Article 1 Table of Contents. 4/4/2006 Housekeeping Changes to Direct 10A,67,68, 67A ER /5/2006 5/31/2006 The OATT revisions submitted by the Companies are housekeeping in nature consisting OATT Readers to the Companies' , (1 sheet) of the correction of an error, of minor formatting changes and of the replacement of OATiOASIS site for a list of current information in the OATT that must necessarily be up to- date and that can best be Eligible Customers & (16 sheets) maintained in a current form by providing Eligible Customers and Transmission Transmission Customers Customers directions in the OATT to the Companies OATIOASIS website. 1/13/2006 Filing to comply with the 432,433, 433B,433C ER /18/2006 2/27/2006 On January 13, 2006 OATT revisions were submitted to comply with Order No. 661-A requirements of Commission 433A (2 sheets) in FERC Docket No. RM issued December 12, 2005 and with Order No. 661: Order No. 661-A making changes (3 sheets) Interconnection for Wind Energy issued June 16, to the LGIP and LGIA to accommodate wind energy 8/12/2005 Compliance filing regarding Order 7,8,10A, 433A, ER /18/ /9/2005 A compliance filing was made to comply with the following three orders: No C, Order No. 2006, and , /12/ Order No C: Standardization of Generator Interconnection Agreements & Order No ,358,359,377 (59 sheets) 10/14/2005 Procedures issued June 16, 2005 in Docket No. RM Change made 403,410,412,416, effective as of July 18, , , 2. Order No. 2006: Standardization of Small Generator Interconnection Agreements & (73 sheets) Procedures issued May 12, 2005 in Docket No. RM Change made effective as of August 12, Order No. 661: Interconnection for Wind Energy issued June 2, 2005 in Docket No. RM05-4. Change made effective as of October 14, /15/2005 Filing in Compliance with 280,285, , ER /19/2005 4/14/2005 A compliance filing was made to comply with Commission Order No B issued Commission Order No B 302,306,308,312, December 20, 2004 in Docket No. RM ,315,325,328, 359,362,365,372,381,385,386,387, ,408,410,412,415,421 (32 sheets) 3/8/2005 Filing of a Settlement Agreement 186,189,190, ER /1/2005 5/6/2005 The filing of this Settlement Agreement resolves all disputed issues relating to SPR's in the General Rate Case for 244, October 1, 2004 tariff filing. Parties to the Settlement Agreement, dated March 7, 2005, Transmission Zone A (SPPC) (4 sheets with changes) include SPR, Truckee-Donner PUD, City of Fallon, Newmont and Barrick. 125,126 At the conclusion of this rate case, the rate had changed as shown in the table below. (2 sheets with new effective date) Rates for SPPC (Zone A) Rate Category Rate Units Previous Rate New Rate Schedule 1: Scheduling, System Control & Dispatch Service: kw per month $ $ Page 12 of 16 12/2/2013