SYSTEM IMPACT STUDY FINAL REPORT. El Paso Electric Company

Transcription

1 SYSTEM IMPACT STUDY FINAL REPORT 115 kv CLUSTER STUDY Prepared for: El Paso Electric Company Prepared by: TRC Engineers, LLC 1526 Cole Boulevard Building 3, Suite 150 Lakewood, CO (303)

2 FOREWORD This report was prepared for the project Interconnection Customer, by System Planning at El Paso Electric Company. Any correspondence concerning this document, including technical and commercial questions should be referred to: David Tovar Manager System Planning Department El Paso Electric Company 100 North Stanton, Loc. 751 El Paso, Texas Phone: (915) Fax: (915) or David Gutierrez Principal Engineer El Paso Electric Company 100 North Stanton, Loc. 751 El Paso, Texas Phone: (915) Fax: (915) i

3 Table of Contents EXECUTIVE SUMMARY INTRODUCTION PERFORMANCE CRITERIA STUDY METHODOLOGY ASSUMPTIONS PROCEDURE Development and Description of Cases kv Cluster Study Generation Modeling Contingency List STEADY STATE POWER FLOW ANALYSIS PRE-PROJECT POWER FLOW EVALUATION Pre-Project N-0 Flow Violations Pre-Project N-1 Flow Violations POST-PROJECT POWER FLOW EVALUATION Post-Project N-0 Power Flow Analysis Post-Project N-1 Power Flow Analysis POWER FLOW ANALYSIS CONCLUSION STEADY STATE VOLTAGE ANALYSIS SHORT CIRCUIT ANALYSIS SHORT CIRCUIT ANALYSIS MODELING SHORT CIRCUIT ANALYSIS PROCEDURE SHORT CIRCUIT ANALYSIS RESULTS AND CONCLUSION STABILITY ANALYSIS DYNAMIC MODELING STABILITY STUDY CASE DEVELOPMENT STABILITY ANALYSIS RESULTS STABILITY ANALYSIS CONCLUSION COST ESTIMATES, ONE-LINES, & PROJECT SCHEDULE DISCLAIMER CONCLUSIONS ii

4 List of Tables Table 1-1: EPE and New Mexico Performance Criteria... 5 Table 3-1: Generator Short Circuit Modeling Data... 8 Table 5-1: Generator Short Circuit Modeling Data Table 6-1: Stability Post-Project Case Scenarios Table 6-2: Transient Stability Analysis Results for both Peak and Off-Peak Cases Table 7-1: Cost Estimate by Project Table 7-2: EPE Interconnection Facilities Costs for POI Stations Table 7-3: EPE Network Upgrade Costs for the CO70S POI Station Table 7-4: EPE Network Upgrade Costs for the DS90S POI Station List of Figures Figure 7-1: CO70S POI and CO70S 115 kv Station One line Figure 7-2: DS90S POI and DS90S 115 kv Station One line Appendices Appendix A kv Cluster System Impact Study Statement of Work Appendix B... Power Flow Contingency List Appendix C... Dynamic Modeling Data Appendix D... Stability Plots Appendix E... Worst Condition Analysis Results Appendix F... Project Schedule iii

5 115 kv Cluster System Impact Study EXECUTIVE SUMMARY The study objective was to determine the impact that the proposed 115 kv Cluster Study generation would have on the El Paso Electric Company (EPE) and Southern New Mexico transmission systems. The proposed 115 kv Cluster Study generation is comprised of a 90 MW PV solar powered project (DS90S) interconnected between EPE s Diablo and Santa Teresa Substations and another 70 MW PV solar powered project (C070S) interconnected between EPE s Chaparral and Oro Grande Substations. The proposed Commercial Operation dates for the two projects included in this System Impact Study (SIS) are identical, and as follows: 1. October 1, 2016 for First Unit Power Block a. Total of 5 MW for each project (DS90S & CO70S) 2. December 1, 2016 for Entire Facilities a. Total of 90 MW for DS90S b. Total of 70 MW for CO70S The only interconnection project in the EPE study queue that has an Interconnection Agreement (IA) with EPE is the Montana Power Station. This project is currently under construction and will consist of four (4) 105 MW gas powered units, located about 3 miles east of EPE s Caliente Substation The Montana Power Station has been included in the base cases for this SIS. The generation from this project will be delivered to serve EPE native load. The Study Areas for the analysis were limited to WECC Areas 11 - EPE and 10 - PNM. Steady State Results The power flow analysis was conducted for 2016 Light Winter and 2017 Heavy Summer load conditions. The Arroyo Phase Shifter was set to regulate N-S Flows in all cases (10-25 MW under Heavy loads and MW under Light loads). The analysis showed that with these Network Upgrades in place, the East Cluster generation does not have an adverse impact on the EPE and Southern New Mexico transmission systems. The power flow analysis results showed that the addition of 115 kv Cluster generation would not require any Network Upgrades other than the 115 kv switching stations to allow for the 2 interconnections. Short Circuit Results A short circuit analysis was performed to determine if the addition of the 115 kv Cluster Study generation would cause any of the EPE or Southern New Mexico transmission system s existing substation circuit breakers to exceed their interrupting capability ratings. The results of this short circuit study show that the maximum fault currents after the 115 kv Cluster generation is placed in service did not exceed the breaker interrupting capability at any substation on the EPE or Southern New Mexico transmission system. 1

6 Stability Results Transient System stability was analyzed for faults relevant to the DS90S & CO70S Study Areas under heavy and light load conditions. The stability results showed that the addition of the new generation projects does not cause any adverse impacts to the system stability performance in the Study Area. Cost Estimates and Schedule Good faith cost estimates are presented. The cost estimates are in 2014 dollars (no escalation applied) and are based upon typical construction costs for previously performed similar construction. These costs include all estimated applicable labor and overheads associated with the engineering, design, and construction of these new EPE facilities. These estimates did not include the Generator Interconnection Costs 1 for any other Interconnection Customer owned equipment or associated design and engineering except for the Point of Interconnection (POI) facilities. The estimated total cost for the required upgrades is $5.16 Million for each project (both CO70S and DS90S) in the 115 kv Cluster. This breaks down to $0.27 Million for the EPE Interconnection Costs 2 at the POI and $4.89 Million for Network Upgrade Costs 3 for both 115 kv Cluster projects. Generator Interconnection Costs have not been estimated as part of this study. Table 0-1 details the cost per year. Table 0-0-1: Cost Estimate by Project Project CO70S DS90S Item EPE Interconnection Cost Network Upgrade Cost (in millions) Interconnection plus Network Upgrades (in millions) (in millions) CO70S Interconnection Station Construction $0.27 $4.89 $5.16 Subtotal CO70S DS90S Interconnection Station Construction $0.27 $4.89 $5.16 Subtotal DS90S Totals $ 5.16 M $ 5.16 M The estimated time frame for Engineering, Procurement, and Construction of Network Upgrades is approximately 19 months upon notice to proceed with construction from the Interconnection Customers. 1 Generator Interconnection Costs: cost of facilities paid for by Interconnection Customer and owned and operated by the Interconnection Customer from the generator facilities to the Change of Ownership Point, which is typically on the first dead-end at the Point of Interconnection substation. Not subject to transmission credits. 2 EPE Interconnection Costs: cost of facilities paid for by Interconnection Customer but owned and operated by EPE from the Change of Ownership Point to the Point of Interconnection. Not subject to transmission credits. 3 Network Upgrades Costs: cost of facilities from the Point of Interconnection outward, paid for by the interconnector but owned and operated by EPE. Subject to transmission credits 2

7 Conclusion This System Impact Study shows that the proposed 115 kv Cluster generation will NOT have an adverse impact on the EPE and Southern New Mexico transmission systems. 3

8 1.0 INTRODUCTION EPE requires that a SIS be performed for generation facilities desiring to connect to the El Paso Electric Transmission System. Since both Interconnection Requests for this 115 kv Cluster Study (2014) have proposed a 115 kv Point of Interconnect (POI),and thus, this SIS was completed to determine any possible impacts the combined 160 MW of proposed generation from the two projects would have on EPE s Transmission System. The proposed Commercial Operation dates for these two projects are identical, and as follows: 1. October 1, 2016 for First Unit Power Block a. Total of 5 MW for each project (DS90S & CO70S) 2. December 1, 2016 for Entire Facilities a. Total of 90 MW for DS90S b. Total of 70 MW for CO70S 1.1 Performance Criteria The Study was performed in accordance with Western Electricity Coordinating Council (WECC), North American Electric Reliability Corporation (NERC), and EPE standards. The EPE local reliability standards can be found in Section 4 of EPE s FERC Form No The steady state and stability analysis was performed using GE s PSLF Version 18.1 power flow software program. Transformer tap and phase-shifting transformer angle movement, as well as static VAR device switching, were allowed for the steady state pre-contingency analysis. All regulating equipment such as transformer controls and switched shunts were fixed at pre-contingency positions when the contingency analysis was performed. All facility loadings, as well as voltages 69 kv and greater, were monitored within the El Paso and New Mexico control areas. Pre-contingency and Post-contingency flows on lines and transformers were required to remain at or below the normal rating, while post-contingency flows on lines and transformers were required to remain at or below the emergency rating. Flows above 100% of an element s pre- or post-contingency rating were considered violations. Post-project voltage criteria violations that either exacerbate or improve an existing pre-project violation were not considered an adverse impact to the system. The performance criteria utilized in qualifying violations in the study area are shown in Table

9 Table 1-1: EPE and New Mexico Performance Criteria Area Conditions Loading Limits Voltage (p.u.) Voltage Drop EPEC PNM Tri- State Normal Contingency Normal Rating Emergency Rating All buses N-2 Rating * Taiban Mesa and Guadalupe 345 kv bus voltage must be between 0.95 and 1.10 p.u. under normal and contingency conditions. ** For PNM buses in southern New Mexico the allowable N-1 voltage drop is 7%. *** Provided operator action can be utilized to adjust voltages back down to 1.05 Application kV and above Artesia 345 kv Arroyo 345 kv PST source side Alamo, Sierra Blanca and Van Horn 69kV % 60 kv to 115 kv % Artesia 345kV % Arroyo 345kV PST source side Alamo, Sierra Blanca and Van Horn 69kV % Hidalgo, Luna, or other 345 kv buses Normal ALIS Normal Rating kv and above* Contingency Emergency *** 6 %** 46 kv to 115 kv N-1 Rating *** 6 %** 230 kv and above Contingency Emergency N-2 Rating *** 10 % 46 kv and above* Normal ALIS Normal Rating All buses Contingency N-1 Contingency Emergency Rating Emergency % % % Tri-State buses in the PNM Service Area (list provided by Tri- State) Tri-State buses in southern and northeastern New Mexico (list provided by Tri-State) 5

10 2.0 STUDY METHODOLOGY 2.1 Assumptions The following assumptions are consistent for all study scenarios unless otherwise noted. This study assumed that all system expansion projects as planned by area utilities by the year under analysis are completed, and that any system improvements required by the interconnections senior to the 115 kv Cluster Study generation are implemented. This study did not analyze any transmission service from the interconnection point to any specific point on the grid for the interconnections senior to the 115 kv Cluster Study generation. 2.2 Procedure The analyses in this study included Steady State, Transient Stability, and Short Circuit Breaker Analysis as stated in the 115 kv Cluster Study SIS Statement of Work in Appendix A. A description of the procedures used to complete the analyses is presented below Development and Description of Cases Two benchmark cases without the proposed 115 kv Cluster Study generation were created using 2017 Heavy Summer (Peak) and 2016 Light Winter (Off Peak) load scenarios. The combined 160 MWs of Solar Cluster generation was then modeled as being dispatched to serve EPE system native load in post project cases under the same two load scenarios. The Arroyo Phase Shifter was modeled to provide MW N-S flow under peak load conditions and MW N-S flow during the off peak load conditions. The Montana Power Station project was included in both benchmark cases. This project is currently under construction and will consist of four (4) 105 MW gas powered units located about 3 miles east of Caliente Substation. The generation from the Montana Power Station project will be delivered to serve native EPE load kv Cluster Study Generation Modeling The 115 kv Cluster generation consists of two (2) Photo Voltaic (PV) Solar installations located on separate sides of EPE s service territory. The first PV installation plans to interconnect at a new 115 kv tap between the Santa Teresa and Diablo Substations. It would be located about 2 miles southeast of the Santa Teresa Station. The requested maximum output of this project is 90 MW. This project would be comprised of 24 PV inverters each producing approximately 4 MW when at full output. Similarly, the second PV installation plans to interconnect at a new 115 kv tap between the Oro Grande and Chaparral Substations. It would be located about 10 miles northeast of the Chaparral Station. This project would use the same 4 MW inverters as the first PV installation, but this second installation would only consist of 18 inverters to produce a maximum requested output of 70 MW when at full output. 6

11 The PV inverters proposed for both projects are expected to produce MW at 0.55 kv. This initial voltage would be immediately stepped up to a 34.5 kv collector system voltage planned for both PV installations. A 115/34.5 kv transformer at each of the proposed projects new buses would then step up the collector system voltage to the 115 kv EPE Transmission System voltage Contingency List All outages (69 kv and above with EPE) were modeled in the subsystem files. The list of contingencies used in this study can be found in Appendix B. Based on engineering judgment, these contingencies were selected to represent a good cross section of potential contingencies that would stress the EPE and PNM southern New Mexico systems. This study was performed for N-0 and N-1 conditions. 7

12 3.0 STEADY STATE POWER FLOW ANALYSIS 3.1 Pre-Project Power Flow Evaluation Peak and off peak base cases were evaluated for thermally overloaded facilities under both normal and contingency conditions prior to the addition of the 115 kv Cluster generation Pre-Project N-0 Flow Violations Power flow study analysis results showed no overloaded transmission facilities were present in the El Paso Electric (EPE) and Public Service Company of New Mexico (PNM) areas under non-contingency system conditions prior to the addition of the East Cluster generation Pre-Project N-1 Flow Violations Power flow contingency analysis results show a few overloads existed in El Paso and New Mexico areas prior to the addition of the 115 kv Cluster generation. Table 3-1 shows the N-1 pre-project overloads in the final study cases. Table 3-1: Generator Short Circuit Modeling Data From Bus kv To Bus kv ID Area Rating (MVA) TURQUOIS 115 HIDALGO TURQTAP 69 TYRONE LORDSBRG 115 LORDSBRG Contingency LUNA 345/115 kv TRAN MD-TURQUOISE 115 kv HIDALGO- TURQUOISE 115 kv 2016lw 2017hs % of Emergency Rating Post-Project Power Flow Evaluation This section provides a high-level understanding of the 115 kv Cluster impact on the loading of transmission lines and transformers in the Study Area. The analysis was performed under both normal and contingency conditions Post-Project N-0 Power Flow Analysis Power flow study results for the EPE and PNM areas showed that the 115 kv Cluster projects did not cause any power flow violations under non-contingency system conditions Post-Project N-1 Power Flow Analysis The contingency list described in Section was used to test projects DS90S and CO70S under N-1 conditions. The power flow study results for the EPE and PNM areas showed that projects did not cause any power flow violations under contingency system conditions. 8

13 3.3 Power Flow Analysis Conclusion The analysis showed that the addition of the 115kV Cluster generation to the system would not cause any thermal overloads on the EPE or New Mexico transmission systems. 9

14 4.0 STEADY STATE VOLTAGE ANALYSIS Bus voltages within the Study Area were evaluated under both normal and contingency conditions, with and without the 115kV Cluster generation in service. The Performance Criteria shown in Error! Reference source not found. were considered when analyzing bus voltages for violations. The voltage analysis results showed that after the addition of the 115kV Cluster generation the Study area transmission network voltages stayed within criteria limits, and did not significantly change from the preproject voltage levels. 10

15 5.0 SHORT CIRCUIT ANALYSIS A short circuit analysis was performed to determine if the addition of the 115 kv Cluster generation to the EPE transmission system would cause any of EPE s transmission system s existing substation circuit breakers to exceed their interrupting capability ratings. 5.1 Short Circuit Analysis Modeling Pre-project and Post-project cases were developed to perform this analysis. As mentioned, any planned or proposed third party generation listed in EPE s study queue ahead of 115 kv Cluster generation was also modeled in the cases. The generator and collector system impedance data used in the study is shown in Table 5-1. This analysis evaluated the impact of the DS90S & CO70S generation by comparing the pre- and postproject fault current levels at selected buses. Table 5-1: Generator Short Circuit Modeling Data Project Total Output (MW) Unit ID Pmax (MW) Interconnection Customer Qmax (MVAR) Qmin (MVAR) DS90S CO70S Z subtransient j j0.9 Rating (MVA) GSU Voltage (kv) / /34.5 Z Subtransient j j Short Circuit Analysis Procedure The initial short circuit analysis was performed with all other third-party generation projects ahead of the 115 kv Cluster generation in the study queue in service and 115 kv Cluster generation out of service. This identified the base case fault duties of the circuit breakers. The short circuit analysis was performed again with 115 kv Cluster generation in service. Three phase, two phase, and single-phase line-to-ground faults were simulated at selected buses in the EPE system with terminal voltages at 69 kv and above. EPE also requested faults on all transformer tertiary buses. ASPEN One Liner and Batch Short Circuit Module were used to perform the short circuit analysis. The short circuit fault analyses were performed with the following settings: Transmission line G+jB ignored. Shunts with positive sequence impedance ignored. Transformer line shunts ignored The pre-fault voltage was calculated using a Flat bus voltage of 1.05 per unit. Fault currents within the EPE System where analyzed before and after the addition of the 115 kv Cluster projects. These scenarios were compared against the smallest breaker interruption ratings at each substation to determine whether any breaker was overdutied under pre-project or post-project conditions. 11

16 5.3 Short Circuit Analysis Results and Conclusion The results of this short circuit study showed that DS90S and CO70S would have only minor impacts to the fault currents on the EPE and Southern New Mexico system. The study also showed that the fault currents produced by the Cluster generation will not exceed the interrupting capability of any existing or proposed circuit breakers on the EPE or Southern New Mexico system. 12

17 6.0 STABILITY ANALYSIS A Transient Stability analysis was performed under peak and off-peak load conditions to determine the degree of impact the Projects may have on the EPE and Southern New Mexico transmission system performance. This analysis evaluated the performance of the system for selected faults. The purpose of this analysis is to ensure the system has adequate damping after a fault/trip event. The simulations were conducted using the PSLF power flow and dynamic simulation software, General Electric, Inc. PSLF load flow software package, Version 18.1 and the associated DYTools module. Dynamic stability simulations were conducted for peak and off-peak load conditions with the 115 kv Cluster generation units off, and on at full capacity. 6.1 Dynamic Modeling EPE provided the base cases and dynamic file data base for this part of the study. The Interconnection Customers provided the detailed model data sheets and/or parameter values. The DS90S generation was modelled as a single PV inverter unit with capacity of 92 MW. Similarly, the CO70S generation was modelled as a single PV inverter unit with capacity of 72 MW. The detailed PSLF model data for these projects (DS90S & CO70S) can be found in Appendix C. 6.2 Stability Study Case Development Two base cases were used to simulate Peak and Off-Peak conditions. These base cases were modified to include the DS90S & CO70S projects. The analysis compared the system response to the fault simulations before and after the 115kV Cluster generation was added. The two dynamic study cases are listed in Table 6-1. Table 6-1: Stability Post-Project Case Scenarios Descriptions 2017 Heavy Load Case 2016 Light Load Case DS90S (92 MW) in service DS90S (92 MW) in service CO70S (72 MW) in service CO70S (72 MW) in service Arroyo PST MW N-S Arroyo PST MW N-S Afton in service Afton out of service 6.3 Stability Analysis Results The stability analysis showed that the EPE and Southwestern New Mexico transmission system remained stable for all simulated faults before and after the addition of the Project. Simulated fault locations, time durations, and system response are shown in Table 6-2. The stability plots of these faults can be found in Appendix D. Worst Condition Analysis (WCA) did not reveal any frequency or voltage criteria violations as the result of the 115kV Cluster projects. The WCA results can be found in Appendix E. 13

18 6.4 Stability Analysis Conclusion The study area remains stable and well damped for all the faults analyzed. The addition of the 115 kv Cluster projects does not pose any concern to system stability performance. 14

19 Table 6-2: Transient Stability Analysis Results for both Peak and Off-Peak Cases 2014 SIS MO420G 105 MW Output Results 2016 Light Load 2017Peak Load Fault Name Event Description Clearing (cycles) Location Projects Projects Projects Projects Off On Off On Tran1 Newman Three Phase fault at Newman 345 kv bus. Newman 345/115 kv tran. = 4.0 Stable Stable* Stable Stable* Tran2 Newman Three Phase fault at Newman 115 kv bus. Newman 345/115 kv tran. = 4.0, Stable Stable* Stable Stable* Tran3 Caliente Three Phase fault at Caliente 345 kv bus. Caliente 345/115 kv tran. = 4.0, Stable Stable* Stable Stable* Line1 Caliente Three Phase fault at Caliente 345 kv bus. Caliente 345 kv = 4.0, Amrad 345 kv = 4.0 Stable Stable* Stable Stable* Line2 Caliente Three Phase fault at Caliente 345 kv bus. Caliente 345 kv = 4.0, Picante 345 kv = 4.0 Stable Stable* Stable Stable* Line3 Picante Three Phase fault at Picante 345 kv bus. Picante 345 kv = 4.0, Caliente 345 kv = 4.0 Stable Stable* Stable Stable* Line4 Newman Three Phase fault at Newman 345 kv bus. Newman 345 kv = 4.0, Picante 345 kv = 4.0 Stable Stable* Stable Stable* Line5 Picante Three Phase fault at Picante 345 kv bus. Picante 345 kv = 4.0, Newman 345 kv = 4.0 Stable Stable* Stable Stable* Line6 Newman Three Phase fault at Newman 345 kv bus. Newman 345 kv = 4.0, Afton 345 kv = 4.0 Stable Stable* Stable Stable* Line7 Afton Three Phase fault at Afton 345 kv bus. Newman 345 kv = 4.0, Afton 345 kv = 4.0 Stable Stable* Stable Stable* Line8 Newman Three Phase fault at Newman 345 kv bus. Newman 345 kv = 4.0, Arroyo 345 kv = 4.0 Stable Stable* Stable Stable* Line9 Diablo Three Phase fault at Diablo 345 kv bus. Diablo 345 kv = 4.0, Luna 345 kv = 4.0 Stable Stable* Stable Stable* Line10 Newman Three Phase fault at Newman 115 kv bus. Newman 115 kv = 4.0, Chaparral 115 kv = 4.0 Stable Stable* Stable Stable* Line11 Chaparral Three Phase fault at Chaparral 115 kv bus. Newman 115 kv = 4.0, Chaparral 115 kv = 4.0 Stable Stable* Stable Stable* Line12 Santa Teresa Three Phase fault at Santa Teresa 115 kv bus. Santa Teresa 115 kv = 4.0, DS90S POI 115 kv = 4.0 Stable Stable* Stable Stable* Line13 DS90S POI Three Phase fault at DS90S POI 115 kv bus. Santa Teresa 115 kv = 4.0, DS90S POI 115 kv = 4.0 Stable Stable* Stable Stable* Line14 NW2 Three Phase fault at NW2 115 kv bus. NW2 115 kv = 4.0, DS90S POI 115 kv = 4.0 Stable Stable* Stable Stable* Line15 DS90S POI Three Phase fault at DS90S POI 115 kv bus. NW2 115 kv = 4.0, DS90S POI 115 kv = 4.0 Stable Stable* Stable Stable* Line16 Chaparral Three Phase fault at Chaparral 115 kv bus. Chaparral 115 kv = 4.0, CO70S POI 115 kv = 4.0 Stable Stable* Stable Stable* Line17 CO70S POI Three Phase fault at CO70S POI 115 kv bus. Chaparral 115 kv = 4.0 CO70S POI 115 kv = 4.0 Stable Stable* Stable Stable* Line18 CO70S POI Three Phase fault at Oro CO70S 115 kv bus. Oro Grande 115 kv = 4.0, CO70S POI 115 kv = 4.0 Stable Stable* Stable Stable* Line19 Oro Grande Three Phase fault at Oro Grande 115 kv bus. Oro Grande 115 kv = 4.0, CO70S POI 115 kv = 4.0 Stable Stable* Stable Stable* Gen1 DS90S Unit No Fault DS90S unit Trip DS90S unit Trip = 4.0 (loss of project) N/A Stable* N/A Stable* Gen2 CO70S Unit No Fault CO70S unit Trip CO70S unit Trip = 4.0 (loss of project) N/A Stable* N/A Stable* Note: Stable - System response stable; Stable* - System response stable and Cluster PV generation units stayed in service. 15

20 7.0 COST ESTIMATES, ONE-LINES, & PROJECT SCHEDULE Good faith cost estimates are presented. The cost estimates are in 2014 dollars (no escalation applied) and are based upon typical construction costs for previously performed similar construction. These costs include all estimated applicable labor and overheads associated with the engineering, design, and construction of these new EPE facilities. These estimates did not include the Generator Interconnection Costs 4 for any other Interconnection Customer owned equipment or associated design and engineering except for the Point of Interconnection (POI) facilities. The estimated total cost for the required upgrades is $5.16 Million for each project (both CO70S and DS90S) in the 115 kv Cluster. This breaks down to $0.27 Million for the EPE Interconnection Costs 5 at the POI and $4.89 Million for Network Upgrade Costs 6 for both 115 kv Cluster projects. Generator Interconnection Costs have not been estimated as part of this study. Table 7-1 details the estimated costs. Table 7-1: Cost Estimate by Project Project CO70S DS90S Item EPE Interconnection Cost (in millions) Network Upgrade Cost (in millions) Interconnection plus Network Upgrades (in millions) CO70S Interconnection $0.27 $4.89 $5.16 Station Construction Subtotal CO70S DS90S Interconnection $0.27 $4.89 $5.16 Station Construction Subtotal DS90S Totals $ 5.16 M $ 5.16 M The one-lines seen in Figure 7-1 and Figure 7-2 show the POI substations equipment with a color coded cost responsibility breakdown. 4 Generator Interconnection Costs: cost of facilities paid for by Interconnection Customer and owned and operated by the Interconnection Customer from the generator facilities to the Change of Ownership Point, which is typically on the first dead-end at the Point of Interconnection substation. Not subject to transmission credits. 5 EPE Interconnection Costs: cost of facilities paid for by Interconnection Customer but owned and operated by EPE from the Change of Ownership Point to the Point of Interconnection. Not subject to transmission credits. 6 Network Upgrades Costs: cost of facilities from the Point of Interconnection outward, paid for by the interconnector but owned and operated by EPE. Subject to transmission credits 16

21 Figure 7-1: CO70S POI and CO70S 115 kv Station One line CO70S Substation CO70S 70 MW 115 kv M 115 kv To Chaparral 9.6 miles 24.8 miles To Oro Grande Existing Chaparral to Oro Grande 115 kv line Color Code Network Upgrades Existing Facilities EPE Interconnection Facilities Located at POI Interconnection Customer Equipment 17

22 Figure 7-2: DS90S POI and DS90S 115 kv Station One line DS90S Substation DS90S 90 MW 115 kv 1.5 miles M 115 kv To Diablo 5.7 miles 2.0 miles To Santa Teresa Existing Diablo/NW2 to Santa Teresa 115 kv line Color Code Network Upgrades Existing Facilities EPE Interconnection Facilities Located at POI Interconnection Customer Equipment 18

23 The substations will be identical for each 115 kv Cluster project, so the installation costs for CO70S and DS90S are also same. Table 7-2 through Table 7-4 provide a more detailed breakdown of the POI substation construction costs, which are the same for each interconnection project. The Project Schedule in Appendix F provides a more detailed breakdown of the estimated time for Engineering, Procurement, Construction and Commissioning. Element Table 7-2: EPE Interconnection Facilities Costs for POI Stations (CO70S & DS90S Costs are Identical) Description DS90S POI Or EPE Interconnection Facilities located at CO70S POI or DS90S POI CO70S POI One 115 kv 2000 A disconnect switch w/ grounding One set of CCVT s and Structures Three Lightning arresters and Structures One Set of 115 kv 3-Phase Metering Units and structures Relaying, communication, and testing Estimated Time Frame for Engineering, Procurement, Construction, and Commissioning Cost Est. Millions $ Months Table 7-3: EPE Network Upgrade Costs for the CO70S POI Station Element CO70S POI 115 kv Substation Description Build a new 115 kv three breaker in a Breaker and a Half Scheme Substation. The new equipment required includes: Cost Est. Millions $4.89 Three 115 kv 3000 A circuit breakers Six 115 kv 2000 A disconnect switches Two 115 kv 2000 A line disconnect switches w/ grounding Six sets of CCVT s and Structures Six Lightning arresters and Structures Three sets of Transmission Line Dead-end Assemblies for Substation Dead-end One lot 115 kv bus, insulators, and structural supports One lot Transmission line relaying, SCADA, communication, and testing One lot ground grid, misc. grounding, concrete, conduit, cable trench, and fencing Relay Setting Changes will also be needed at Chaparral and Oro Grande Estimated Time Frame for Engineering, Procurement, Construction, and Commissioning 24 Months 19

24 Table 7-4: EPE Network Upgrade Costs for the DS90S POI Station Element DS90S POI 115 kv Substation Description Build a new 115 kv three breaker in a Breaker and a Half Scheme Substation. The new equipment required includes: Cost Est. Millions $4.89 Three 115 kv 3000 A circuit breakers Six 115 kv 2000 A disconnect switches Two 115 kv 2000 A line disconnect switches w/ grounding Six sets of CCVT s and Structures Six Lightning arresters and Structures Three sets of Transmission Line Dead-end Assemblies for Substation Dead-end One lot 115 kv bus, insulators, and structural supports One lot Transmission line relaying, SCADA, communication, and testing One lot ground grid, misc. grounding, concrete, conduit, cable trench, and fencing Relay Setting Changes will also be needed at Diablo and Santa Teresa (and possibly the new Verde Station) 7 Estimated Time Frame for Engineering, Procurement, Construction, and Commissioning 24 Months 7 A new Verde Substation between the Diablo and Santa Teresa stations was scheduled to be in-service in May 2016 but has been delayed until May The relay setting changes required due to the DS90S project will vary based on the COD of both the Verde Substation and the DS90S project. 20

25 8.0 DISCLAIMER If any of the project data provided by Interconnection Customer and used in this study varies significantly from the actual data of the installed generation equipment for both DS90S & CO70S, the results from this study will need to be verified with the actual data at the Project Interconnection Customer's expense. Additionally, any change in the generation in EPE s Interconnection Queue that is senior to the 115 kv Cluster generation may require a re-evaluation of this Study. 21

26 9.0 CONCLUSIONS This 115 kv Cluster System Impact Study, consisting of a Steady State, Short Circuit and Stability Analysis, for a net 160 MW of generation interconnecting on the EPE transmission systems, has demonstrated that the 115 kv Cluster generation will NOT have an adverse impact on the EPE and Southern New Mexico transmission, and no Network Upgrades are required. The estimated cost for integrating both 115 kv Cluster generation projects onto the EPE and Southern New Mexico transmission systems is $10.32 Million. This breaks out to $5.16 Million for DS90S and $5.16 Million for CO70S. The good faith estimate of the time frame to Engineer, Procure, and Construct all facilities is 19 months for each POI switching station. 22

27 Appendix A 115 kv Cluster System Impact Study Statement of Work 115 kv Cluster System Impact Study Appendix A TRC

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34 Appendix B Contingency List 115 kv Cluster System Impact Study Appendix B TRC

35 CONTINGENCY LIST Transmission Lines 1. ALA_ to ORO_GRAN Circuit 1 2. AMRAD to LARGO Circuit 1 3. AMRAD to ARTESIA Circuit 1 4. ANTHONY to BORDER Circuit 1 5. ANTHONY to MONTOYA Circuit 1 6. ANTHONY to NEWMAN Circuit 1 7. ANTHONY to SALOPEK Circuit 1 8. ASCARATE to COPPER Circuit 1 9. ASCARATE to RIVERENA Circuit AUSTIN_N to MARLOW Circuit AUSTIN_N to MARLOW Circuit BUTERFLD to FT._BLIS Circuit CALIENTE to LANE # Circuit CALIENTE to VISTA # Circuit CALIENTE to AMRAD Circuit CHAPARAL to ORO_GRAN Circuit COPPER to LANE # Circuit COPPER to PENDALE Circuit COYOTE to CALIENTE Circuit COYOTE to RGC_DC Circuit CROMO to RIO_GRAN Circuit DIABLO to RIO_GRAN Circuit DIABLO to RIO_GRAN Circuit DIABLO to INSURG Circuit DYER to AUSTIN_N Circuit DYER to SHEARMAN Circuit 27. BIGGS to GR Circuit FT._BLIS to AUSTIN_N Circuit GR to VISTA # Circuit HATCH to JORNADA Circuit HOLLOMAN to LARGO Circuit HORIZON to MONTWOOD Circuit JORNADA to ARROYO Circuit LANE # to WRANGLER Circuit LAS_CRUC to ARROYO Circuit LAS_CRUC to SALOPEK Circuit LUNA to DIABLO Circuit LUNA to HIDALGO Circuit LUNA to AFTON Circuit MAR to LARGO Circuit MARLOW to TROWBRIG Circuit MESA # to AUSTIN_N Circuit MESA # to RIO_GRAN Circuit MILAGRO to NEWMAN Circuit MILAGRO to NEWMAN Circuit MILAGRO to LEO Circuit NEWMAN to BUTERFLD Circuit NEWMAN to CHAPARAL Circuit NEWMAN to CROMO Circuit NEWMAN to SHEARMAN Circuit NEWMAN to ARROYO Circuit NEWMAN to AFTON Circuit NE to NEWMAN Circuit PELICANO to HORIZON Circuit PELICANO to MONTWOOD Circuit RIPLEY to THORN Circuit MONTWOOD to CALIENTE Circuit MONTWOOD to COYOTE Circuit ORO_GRAN to AMRAD Circuit RIO_GRAN to RIPLEY Circuit SALOPEK to ARROYO Circuit SANTA_T to DIABLO Circuit SANTA_T to MONTOYA Circuit SANTA_T to NW Circuit SCOTSDALE to VISTA # Circuit PENDALE to LANE # Circuit SOL to LANE # Circuit SOL to VISTA # Circuit SPARKS to HORIZON Circuit SUNSET_N to RIO_GRAN Circuit TALAVERA to ANTHONY Circuit THORN to MONTOYA Circuit NW to DIABLO Circuit WHITE_SA to ALA_ Circuit WRANGLER to SPARKS Circuit WRANGLER to SPARKS Circuit AEP to AZTECAS Circuit AEP to REA Circuit CHAMIZAL to COLEGIO Circuit CHAMIZAL to RIVERENA Circuit CHAVENA to AZTECAS Circuit COLEGIO to CHAVENA Circuit COLEGIO to FTS Circuit FTS to TEC Circuit INSURG to CHAMIZAL Circuit INSURG to CHAVENA Circuit REA to AZTECAS Circuit REA to INSURG Circuit CALIENTE to PICANTE Circuit NEWMAN to PIPELINE Circuit LEO to DYER Circuit PICANTE to NEWMAN Circuit 1

36 CONTINGENCY LIST Transmission Lines 93. PICANTE to BIGGS Circuit PICANTE to GR Circuit ANTHONY to NW Circuit ARROYO to COX Circuit APOLLOSS to APOLLO Circuit HATCH to LEASBURG Circuit LE to APOLLOSS Circuit LE to JORNADA Circuit SUNSET_N to DURAZNO Circuit DURAZNO to ASCARATE Circuit NW to MONTOYA Circuit COX to APOLLOSS Circuit APOLLO to JORNADA Circuit LEASBURG to JORNADA Circuit NE to CROMO Circuit ANTHONY to COX Circuit COX to TALAVERA Circuit ASCARATE to COPPER Circuit JORNADA to AIRPOR Circuit AFTON to AIRPOR Circuit SOL to VISTA # Circuit NEWMAN to PICANTE Circuit PIPELINE to BIGGS Circuit HIDALGO to GREENLEE Circuit LUNA to LEF Circuit DONA_ANA to LAS_CRUC Circuit AMRAD to ALAMOGCP Circuit HOLLOMAN to ALAMOGCP Circuit AIRPOR_T to AIRPOR Circuit CABALLOT to UVAS Circuit UVAS to MIMBRES Circuit ORO_GRAN to JARILLA Circuit WSTAP to WHITE_SA Circuit ASCARATE to TROWBRIG Circuit EPE to COYOTE Circuit EPE to MONTWOOD Circuit CALIENTE to EPE Circuit CALIENTE to EPE Circuit CALIENTE to VISTA # Circuit CALIENTE to SE Circuit CALIENTE to SE Circuit CALIENTE to PICANTE Circuit MACHO_SPRNGS to LUNA Circuit MACHO_SPRNGS345.0 to SPRINGR Circuit LE to ARROYO Circuit SE to LANE # Circuit Line SE to LANE # Circuit RIPLEY to THORN Circuit PICANTE to AMRAD Circuit WESTMESA to ARR PS Circuit ORO GRANDE TO CO70S Circuit CHAPARRAL TO CO70S Circuit NW to ROADRUNRTAP Circuit ROADRUNRTAP to DIABLO Circuit ROADRUNRTAP to ROADRUNER Circuit ART320W to ARTESIA Circuit Line CALIENTE to CORONA Circuit AMRAD to AA100W Circuit AA100W to ARTESIA Circuit CORONA to AMRAD Circuit CORONA to AMRAD Circuit CORONA to PICANTE Circuit CORONA to NEWMAN Circuit WESTMESA to WA300POI Circuit WA300POI to ARR PS Circuit WA300POI to WA300_C Circuit WA300_C to WA300_C Circuit IRONSTREET-PRAGER 46 kv (PI) 161. IRONSTREET-PERSON 46 kv (PH) 162. PERSON-TOME 46 kv (PB) 163. PERSON-TOME 46 kv (BN) 164. PERSON-PY47 46 kv (EL) 165. POWERPLANT-ZIA 46 kv (ZS) 166. POWERPLANT-ZIA 46 kv (ZM) 167. PRAGER-KELEHER 46 kv (PY) 168. SANDIA-IDEAL 46 kv (ID) 169. ALGODONE-PACHMANN 115 kv (AL) 170. ALGODONE-NORTON/ZIA1 115 kv (ANZ) 171. ALGODONE-AW CAP 115 kv 172. AW CAP-WILLARD 115 kv 173. AMBROSIA-BLUEWATER 115 (MB) 174. AMBROSIA-GULF PGT 115 kv (MA) 175. AMBROSIA-YAHTAHEY 115 kv (AY) 176. BA-ZIA 115 kv (RS) 177. BA-REEVES kv (AB) 178. BA-REEVES kv (RB) 179. BA-STA 115 kv (RL) 180. BA-PACHMANN 115 kv (CB) 181. BELEN-WILLARD 115 kv (WL) 182. BELEN-TOME 115 kv (TJ) 183. BELEN-WEST MESA kv (WB) 184. BELEN-SOCORRO 115 kv (SOC) 185. CORRALES-IRVING 115 kv (IC)

37 CONTINGENCY LIST Transmission Lines 186. CORRALES-PACHMANN 115 kv (CY) 187. EMBUDO-SANDIA kv (SE) 188. EMBUDO-NORTH(TL)/EB86 (EB) 115 kv 189. EMBUDO-REEVES kv (RE) 190. EMBUDO-REEVES kv (ER) 191. IRVING-WEST MESA kv (WR) 192. IRVING-REEVES kv (IR) 193. KIRTLAND-PERSON 115 kv (PS) 194. KIRTLAND-SANDIA kv (KS) 195. NORTH-PRAGER 115 kv (PN) 196. NORTH-MISSION 115 kv (MN) 197. NORTH-REEVES kv (RN) 198. NORTON-ETA 115 kv (NL) 199. NORTON-ZIA kv (NS) 200. NORTON-HERNANDEZ 115 kv (NH) 201. OJO-HERNANDEZ 115 kv (HO) 202. PACHMANN-WEST MESA kv (CE) 203. PERSON-SP83/HW kv (SP) 204. PERSON-WEST MESA kv (PM) 205. PERSON-TOME 115 kv (AT) 206. PERSON-WEST MESA kv (PW) 207. PRAGER-WEST MESA kv (WP) 208. REEVES 2-MISSION 115 kv (NR) 209. REEVES 2-WEST MESA kv (NW) 210. SANDIA 1-HW43/EB kv (EB) 211. SANDIA 2-SP kv (SP) 212. VALENCIA-ZIA 115 kv (SL) 213. VALENCIA-STORRIE LAKE 115 kv (VS) 214. WEST MESA 115 kv BUS TIE WEST MESA 1-GULF PGT 115 kv (KM) 216. WEST MESA 115 kv BUS TIE WEST MESA 3-BLUEWATER 115 kv (BW) 218. YAHTAHEY-PEGS 115 kv (GYTH&WTG) 219. ZIA 115 kv BUS TIE 220. ETA-STA 115 kv (SA) 221. ETA-WTA 115 kv (TE) 222. ETA-TA kv (LA) 223. STA-WTA 115 kv (SW) 224. TA3-TA kv (SW) 225. TA3-WTA 115 kv (WT) 226. SPRINGER-TAOS 115 kv 227. SPRINGER-STORRIE LAKE 115 kv 228. TAOS-HERNANDEZ 115 kv 229. GLADSTONE-CLAPHAM 115 kv 230. RIO PUERCO - CORRALES BLUFFS (RR) 115 kv 231. AMBROSIA-WEST MESA 230 kv (WA) 232. AMBROSIA-PEGS 230 kv 233. AMBROSIA-BISTI 230 kv (BI) 234. BA-RIO PUERCO 345 kv 235. WEST MESA-RIO PUERCO 345 kv 236. BA-GAUDALUPE 345 kv (BB) 237. B-A-RIO PUERCO 345 kv 238. SAN JUAN-RIO PUERCO 345 kv 239. BA-NORTON 345 kv (NB) 240. BISTI-PILLAR 230 kv (BP) 241. FOUR CORNERS-WEST MESA 345 kv (FW) 242. GALLEGOS-PILLAR 230 kv (GC) 243. OJO-SAN JUAN 345 kv (OJ) 244. OJO-TAOS 345 kv (OT) 245. PILLAR-FOUR CORNERS 230 kv (AF) 246. SANDIA-WEST MESA 345 kv (WS) 247. SAN JUAN-SHIPROCK 345 kv (SR) 248. SAN JUAN-MCKINLEY 345 kv # SAN JUAN-MCKINLEY 345 kv # SAN JUAN-SANJN PS 345 kv (SH) 251. TAIBAN-BLACKWATER 345 kv (TB) 252. WALSENBURG - GLADSTON 230 kv 253. LORDSBURG-MD 69 kv 254. SILVER CITY-TURQUOISE 69 kv 255. SILVER CITY-MD 69 kv 256. ALMAMOGORDO-AMRAD 115 kv 257. ALAMOGORDO-DONA ANA 115 kv 258. ALAMOGORDO-HOLLOMAN 115 kv 259. AMRAD-LARGO/HOLLOMAN 115 kv 260. AMRAD-OROGRANDE 115 kv 261. HIDALGO-LORDSBURG 115 kv 262. HIDALGO-TURQUOISE 115 kv 263. LUNA-MIMBRES 115 kv 264. LUNA-MD 115 kv 265. MD-TURQUOISE 115 kv 266. MIMBRES-PICACHO 115 kv 267. MIMBRES-ELEPHANT BUTTE 115 kv 268. PICACHO-DONA ANA 115 kv 269. PICACHO-ELEPHANT BUTTE 115 kv 270. SANTA TERESA DS70S 115 kv 271. DS70S-NW2 115 kv 272. LUNA-LEF kv

38 273. AMRAD 345/115 kv Circuit ARROYO 345/115 kv Circuit ARROYO 345/115 kv Circuit CALIENTE 345/115 kv Circuit CALIENTE 345/115 kv Circuit DIABLO 345/115 kv Circuit DIABLO 345/115 kv Circuit DIABLO 345/115 kv Circuit NEWMAN 345/115 kv Circuit PICANTE 345/115 kv Circuit AFTON 345/115 kv Circuit HIDALGO 345/115 kv Circuit HIDALGO 345/115 kv Circuit LUNA 345/115 kv Circuit ZIA 115/46 kv TRANSFORMER # ZIA 115/46 kv TRANSFORMER # PERSON 115/46 kv TRANSFORMER 290. PRAGER 115/46 kv TRANSFORMER 291. SANDIA 115/46 kv TRANSFORMER # TOME 115/46 kv TRANSFORMER 293. ZIA 115/46 kv TRANSFORMER # ZIA 115/46 kv TRANSFORMER #1 & SPRINGER-GLADSTONE 115 kv 296. TAOS 345/115 kf TRANSFORMER # TAOS 345/115 kf TRANSFORMER # AMBROSIA 230/115 kv TRANSFORMER 299. BA 345/115 TRANSFORMER 300. OJO 345/115 kv TRANSFORMER 301. SANDIA 345/115 kv TRANSFORMER 302. WESTMESA 345/115 kv TRANSFORMER # WESTMESA 345/115 kv TRANSFORMER # WESTMESA 230/115 kv TRANSFORMER # WESTMESA 230/115 kv TRANSFORMER # NORTON 345/115 kv TRANSFORMER 307. MCKINLEY-YAHTAHEY 345/115 kv TRANSFORMER 308. SAN JUAN-HOGBACK 230/115 kv TRANSFORMER CONTINGENCY LIST Transformers

39 CONTINGENCY LIST Generators 309. AMRAD_A 13.2 Unit ID NEWMANG Unit ID NEWMN4S Unit ID NEWMN5G Unit ID NEWMN5G Unit ID NEWMN5S Unit ID NEWMN6G Unit ID NEWMN6G Unit ID NEWMN6S Unit ID RIOGD_G Unit ID RIOGD_G Unit ID ST_DIST_PV 24.9 Unit ID APT_DIST_PV 24.9 Unit ID CHAP_DIST_PV 13.8 Unit ID HAT_DIST_PV 24.9 Unit ID MOCC_G Unit ID MOCC_G Unit ID MOCC_G Unit ID MOCC_G Unit ID MO420G ALL UNITS" 329. CO70S OV 330. DS90S PV

40 Appendix C Dynamic Modeling Data 115 kv Cluster System Impact Study Appendix C TRC

41 #New kv Cluster Models regc_a "OT_PV_1 " 0.55 "1 " : #99 mva= "lvplsw" "rrpwr" "brkpt" "zerox" "lvpl1" "vtmax" "lvpnt1" "lvpnt0" "qmin" "accel" / "tg" "tfltr" "iqrmax" "iqrmin" "xe" 0.0 gencls "OT_PV_POI " "IN" : #9 mva= "h" "d" "ra" "lppd" / "rcomp" "xcomp" "accel" reec_b "OT_PV_1 " 0.55 "1 " : #99 "mvab" "vdip" "vup" "trv" "dbd1" "dbd2" "kqv" 0.0 "iqh1" "iql1" "vref0" / "tp" "qmax" "qmin" "vmax" "vmin" "kqp" "kqi" 0.0 "kvp" "kvi" 0.0 "tiq" / "dpmax" "dpmin" "pmax" "pmin" 0.0 "imax" "tpord" "pfflag" 0.0 "vflag" 0.0 "qflag" "pqflag" 0.0 regc_a "ST_PV_1 " 0.55 "1 " : #99 mva= "lvplsw" "rrpwr" "brkpt" "zerox" "lvpl1" "vtmax" "lvpnt1" "lvpnt0" "qmin" "accel" / "tg" "tfltr" "iqrmax" "iqrmin" "xe" 0.0 gencls "ST_PV_POI " "IN" : #9 mva= "h" "d" "ra" "lppd" / "rcomp" "xcomp" "accel" reec_b "ST_PV_1 " 0.55 "1 " : #99 "mvab" "vdip" "vup" "trv" "dbd1" "dbd2" "kqv" 0.0 "iqh1" "iql1" "vref0" / "tp" "qmax" "qmin" "vmax" "vmin" "kqp" "kqi" 0.0 "kvp" "kvi" 0.0 "tiq" / "dpmax" "dpmin" "pmax" "pmin" 0.0 "imax" "tpord" "pfflag" 0.0 "vflag" 0.0 "qflag" "pqflag" kv Cluster System Impact Study 1 Appendix C TRC

42 Appendix D Stability Plots APPENDIX D

43 Stability plots are not included in this report because there are 972 pages of plots in this study. Plots for the study will be provided upon request. APPENDIX D

44 Appendix E Worst Condition Analysis Results APPENDIX E

45 Worst Condition Analysis (WCA) results are not included because there are 563 pages of results in this study. WCA results for the study will be provided upon request. APPENDIX E

46 Appendix F Project Schedule 115 kv Cluster System Impact Study Appendix F TRC

47 ID Task Name Duration Start Finish Predecessors 1 CO70S and DS90S POI Switching Station 528 days Mon 12/1/14 Wed 12/7/16 4th Quarter 3rd Quarter 2nd Quarter 1st Q Sep Jan May Sep Jan May Sep Jan 2 Preliiminary Engineering 1.6 wks Mon 12/1/14 Wed 12/10/14 3 Permitting 26 wks Thu 12/11/14 Wed 6/10/ Engineering and Procurement 52 wks Thu 6/11/15 Wed 6/8/ Construction 26 wks Thu 6/9/16 Wed 12/7/ Chaparrall - Oro Grande Relay Work 105 days Thu 4/14/16 Wed 9/7/16 8 Engineering and Procurement 16 wks Thu 4/14/16 Wed 8/3/16 3FS+44 wks 9 Construction 5 wks Thu 8/4/16 Wed 9/7/16 8 Task Rolled Up Milestone Inactive Summary Task Progress Rolled Up Progress Manual Task Critical Task Split Duration-only Project: 115 kv Cluster Project Schedu Date: Thu 11/13/14 Critical Task Progress Milestone External Tasks Project Summary Manual Summary Rollup Manual Summary Summary Group By Summary Start-only Rolled Up Task Inactive Task Finish-only Rolled Up Critical Task Inactive Milestone Deadline Page 1