This Meeting Tri-State is committed to an open, transparent, and - PowerPoint PPT Presentation

This Meeting  Tri-State is committed to an open, transparent, and meaningful transmission planning process and welcomes input from all stakeholders.  These efforts may be supplemented by additional stakeholder outreach activities in connection with individual transmission projects or overall programmatic needs, as necessary.  Final outreach meeting for 2015.  Same information as discussed at previous Colorado Coordinated Planning Group (CCPG) meetings.

This Meeting  Your input will be considered and included in the biennial transmission plans submitted to the CO PUC pursuant to Rule 3627.  The Rule 3627 transmission plan is due February 2016.  Alternatives proposed at this meeting may be referenced in the 2016 filing, but will be incorporated in the 2016/2017 study cycle.  More information:  www.tristategt.org/TransmissionPlanning  You can also provide comments, alternatives, or submit questions through the website.

What are Tri-State’s Transmission Planning Objectives?  Provide Transmission Service to all network customers.  Provide Reliable Service under NERC/WECC Reliability Standards.  Provide Low Cost Service to Member owners.  Provide Access to other stakeholders for the efficient planning, utilization and development of the transmission system.

Who is Tri-State? Founded in 1952, Tri-State is a not-for-profit, wholesale power supplier owned by 44 electric cooperatives and public power districts serving a population of approximately 1.4 million people. Tri-State's mission is to provide our member systems a reliable, cost-based supply of electricity in accordance with cooperative principles.

Tri-State Statistics  5,396 miles of transmission in which Tri-State has an ownership or capacity interest:  1220 miles - 345 kV  1001 miles - 230 kV  184 miles - 138 kV  2942 miles - 115 kV  49 miles - 69 kV  Over 220 Transmission Substations  David A. Hamil DC Tie at Stegall, NE (110 MW)  July 2015 Coincident Peak = 2,596 MW  TS All-Time Peak July 2014 = 2,813 MW

Transmission System This meeting

How is Tri-State’s transmission plan developed?  Network Customers identify load and resource requirements annually.  Other Transmission Providers update base case assumptions (system topology, loads and resources).  Tri-State Member Systems request new delivery points throughout the year.  Stakeholder requests, comments, and alternatives.

Transmission Plan Development (continued)  Generation Interconnection customers submit applications (January – February and July - August).  Regulatory and governmental agencies introduce policy initiatives.  Tri-State’s Board of Directors make decisions on capital expenditures.

Transmission Project Categories  Under Construction  Planned  Conceptual

Transmission Projects: Under Construction

Burlington – Lamar 230 kV Transmission Project

Burlington – Lamar 230 kV Transmission Project Construct a 230 kV transmission line from Description: Burlington to Lamar. Voltage: 230 kV Length: 107 miles Type: Line Status: Under Construction Planned 2020 ISD: Reliability, improve load-serving capability, remove generation operating restrictions, and Purpose: support renewable resource development in eastern Colorado. 2012, 2014 (as an element of Lamar Front 10yr plan: Range)

Burlington – Wray 230 kV Line

Burlington – Wray 230 kV Line Construct new 230 kV line from the existing Description: Burlington Substation to the existing Wray Substation Voltage: 230 kV Length: 72 miles Type: Line Status: Under Construction Planned 2016 ISD: Improve load-serving capability, remove generation operating restrictions and support Purpose: renewable resource development in eastern Colorado. 10yr plan: 2012, 2014

Western Colorado Transmission Upgrade Project

Western Colorado Transmission Upgrade Project Upgrade existing transmission line and Description: facilities from Montrose Substation to Cahone Substation from 115 kV operation to 230 kV. Voltage: 230 kV Length: 80 miles Type: Line Status: Under Construction Planned 2018 ISD: Reliability – eliminate need for existing Nucla Purpose: Remedial Action Scheme and replace failing structures. 10yr plan: 2014

Pueblo West Tap Line Uprate

Pueblo West Tap Line Uprate Description: Upgrade existing 115 kV line conductor Voltage: 115 kV Length: 0.3 miles Type: Line Status: Under Construction Planned 2016 ISD: Reliability, eliminate overloading of existing Purpose: line for NERC Category B contingency 10yr plan: 2014

San Juan Basin Energy Connect Project

San Juan Basin Energy Connect Project New 230 kV transmission line between existing WAPA Shiprock Substation in New Description: Mexico to a new 230 kV Iron Horse Substation. A new 230 kV Kiffen Canyon Substation will also be required Voltage: 230 kV Length: 70 miles Type: Line Status: Under Construction Planned 2018 ISD: Reliability for loss of Hesperus 345 kV source Purpose: and to serve approximately 100 MW of new industrial load in SW Colorado 10yr plan: 2012, 2014

Southwest Weld Expansion Project

Southwest Weld Expansion Project Construct approximately 49 aggregated miles of 115 kV and 230 kV transmission lines with Description: six potential load-serving substations and/or line taps. Voltage: 115/230 kV Length: 49 miles Type: Line Status: Under Construction Planned 2018 ISD: Purpose: Load Serving 10yr plan:

Transmission Projects: Planned

Big Sandy - Calhan

Big Sandy - Calhan New 230 kV line between Big Sandy and Description: Calhan Substations Voltage: 230 kV Length: 55 miles Type: Line Status: Planned Planned 2021 ISD: Support Member load between Denver and Purpose: Colorado Springs 10yr plan: 2012, 2014

Falcon – Midway 115 kV Line Uprate Project

Falcon – Midway 115 kV Line Uprate Project Planned uprate of existing 115 kV line Description: between Falcon and Midway Voltage: 115 kV Length: 27miles Type: Distribution Status: Planned Planned 2019 ISD: Purpose: Increase conductor thermal rating 10yr plan: 2012, 2014

Lost Canyon – Main Switch 115 kV Project

Lost Canyon – Main Switch 115 kV New transmission line between Lost Canyon Description: and Main Switch Voltage: 115kV Length: 20 miles Type: Line Status: Planned Planned 2018 ISD: Purpose: Increase load serving capability 10yr plan:

San Luis Valley – Poncha 230 kV Project

San Luis Valley – Poncha 230 kV Project Construct approximately 60 mile 230 kV Description: transmission line from the San Luis Valley to Poncha 230 kV. Voltage: 230 kV Length: 60 miles Type: Line Status: Planned Planned 2022 ISD: Purpose: Reliability SLV-Calumet-Comanche: 2012 10yr plan: Valley Corridor: 2014

Transmission Projects: Conceptual

Boone – Walsenburg 230 kV Line

Boone – Walsenburg 230 kV Line Construct a 230 kV transmission line from Description: Boone Substation to Walsenburg Substation Voltage: 230 kV Length: 69 miles Type: Line Status: Conceptual Planned To be determined ISD: Reliability – eliminate the need for the existing Purpose: Walsenburg Remedial Action Scheme (RAS) 10yr plan: 2014

Lamar – Front Range Project

Lamar – Front Range Project Two high voltage transmission paths from Lamar Substation to Pueblo area and a Description: second path from Lamar to substations near Brush and/or Deer Trail Voltage: 345 kV Length: 300 – 350 miles Type: Line Status: Conceptual Planned To be determined ISD: Tri-State reliability, system load-serving connectivity as regional power provider and Purpose: future resources. Xcel Senate Bill07-100 and reliability. 10yr plan: 2012, 2014

Lamar – Boone 230 kV Line

Lamar – Boone 230 kV Line Construct a 230 kV transmission line from Description: Boone Substation to Lamar Substation Voltage: 230 kV Length: 100 miles Type: Line Status: Conceptual Planned To be determined ISD: Accommodate potential increased resource Purpose: injection at Lamar. Subset of Lamar Front Range. 10yr plan: Lamar Front Range: 2012, 2014

Impacts of the Clean Pow er Plan  Colorado is in the early stages of formulating its plan for complying with the Clean Power Plan (CPP).  Tri-State is engaged with the relevant state agencies in the development of Colorado’s compliance plan, which is due September 6, 2016.  While Tri-State anticipates that aspects of the Colorado CPP compliance plan may impact transmission plans, those impacts are not yet known and it is premature to include in the 2016 Plan specific transmission projects related to the CPP.  Tri-State will continue to coordinate with stakeholders with respect to the transmission planning implications of the CPP and expects to address this issue in the next Ten-Year Plan planning cycle.

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