1. Utility Executive Roundtable: Co-op renewable energy initiatives Lee Boughey September 16, 2010

2. TRI-STATE G&T Consumer-owned, not-for- profit wholesale power supplier to 44 member co-ops Initiatives Improving existing fleet Transmission development Renewable energy Energy efficiency Developing technology options to manage GHG risk

3. TRI-STATE UTILITY-SCALE RENEWABLE SUPPLY Western Area Power Administration hydropower Cimarron Solar Kit Carson Windpower Other contracts for distributed generation, including small hydro and biomass Member renewable and distributed energy contracts

4. RENEWABLE MANDATES 10 percent energy in 2020 Applies to member cooperatives in Colorado and New Mexico Tri-State will supply renewable energy to meet members’ requirements Tri-State supports member development of local renewable energy

5. RENEWABLES RFP Meet Colorado and New Mexico RPS definition Commercial technology Sought least 150,000 MWH per year, equivalent to 50 MW wind farm at 35 percent capacity Minimum delivery of at least 15,000 MWH per year Fuel and technology neutral Cost was key criteria

6. CIMARRON SOLAR PROJECT 30-megawatts 500,000 thin film panels 250 acres near Springer, N.M. 25-year PPA Online late 2010 No transmission required EPC is First Solar Owned by the Southern Company and Turner Renewable

8. KIT CARSON WINDPOWER PROJECT 51-megawatts 34 GE 1.5 SLE turbines 6,000 acres near Burlington, Colo. 20-year PPA Online late 2010 No transmission required Owner and operator is Duke Energy Generation Services

9. MEMBER LOCAL RENEWABLE PROJECTS Policies support local development of resources 25 MW Member projects planned or in place Kit Carson solar projects in northern N.M. Highline Electric (NE Colo.) and La Plata Electric (SW Colo.) recovered energy facilities San Miguel Power hydro and solar facilities in SW Colo. Poudre Valley REA methane gas facility in northern Colo. Delta-Montrose EA hydropower project in western Colo.

10. SOLAR AUGMENTATION Tri-State’s Escalante Station hosting solar augmentation project EPRI study on feasibility of integrating concentrated solar power technology with coal-based power plant If economical, could provide options to reduce emissions and increase efficiency

11. BIOMASS AUGMENTATION Tri-State’s Nucla Station uses atmospheric circulating fluidized-bed combustion that could support biomass co-firing Tri-State’s gas units could use biomass derived oils or gas Tri-State evaluating technology and economics – could be cost effective relative to other technologies

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