1. Barry Ingold
Senior Vice President, Generation

2. Tri-State Generation and Transmission Association, Inc.
Not-for-profit cooperative wholesale power supplier owned by member cooperatives and public power districts
Serve more than1 million member- owners across nearly 200,000 square miles

3. Tri-State G&T 2,753 MW coincident peak demand 17.8 GWh sales
$1.4 billion operating revenue
$53.4 million margins
$4.9 billion assets
1,561 employees

4. Generation Resources 1,874 MW base load coal
965 MW intermediate and peaking natural gas/oil
923 MW renewable
Hydro
Wind
Solar
558 MW contracts

5. 2016 Tri-State Resource Mix
2016 Energy
As a % of gross member sales
2016 Capacity (%)
Oil <1%
Market Purchases 12%
Renewable 24%
Coal 43%
Coal 50%
Renewable 27%
Basin 12%
Natural Gas 19%
Basin 9%
Natural Gas 2%
Oil 2%

6. Renewable Generation April 2017 RENEWABLES = 379 GWH
Other Renewables 1%
Policy 115 5%
RENEWABLES = 379 GWH
26% of Total Power Supply
32% of Member Sales
San Isabel 1%
Alta Luna 2%
Basin 9%
Carousel 17%
WAPA - LAP 19%
Colorado Highlands 9%
Kit Carson 5%
WAPA - CRSP 33%
Cimarron 1%

7. Scheduled Coal Unit Retirements
Total Capacity (MW)
Tri-State Capacity (MW)
Retirement Date
San Juan #3
Waterflow, NM
500 41
2017
Nucla
Nucla, CO
100
2022
Craig #1
Craig, CO
428
104
2025
TOTALS
1,028
244

8. Resource Additions 1 R T 8 Resource Additions
Year
Resource
Fuel
Megawatts
2008
Rawhide
Natural Gas
100
2009
J. M. Shafer
150
Brush 70
2010
Kit Carson
Wind 51
2011
Cimarron
Solar 30
122
2012
Basin Electric
Unspecified 75 1 R T
Colorado Highlands 67
2013
Boulder Canyon
Hydro 5
CHW 2 24
2014
Ridgway 8
Vallecito 6
2015
Shoshone 3
2016
Carousel
San Isabel Solar
2017
Williams Fork
3.5
Alta Luna 25
Twin Buttes 76
2008-present
Member Generation
Various
113 *
8 Resource Additions
enewables: Natural gas: Unspecified:
592 MW
442 MW
75 MW
otal
1,109 MW
* Tri-State provided financial incentives

9. Rankine and Advanced
Steam Cycles

10. The Rankine Cycle

11. Subcritical steam production

12. Supercritical steam production

13. Continued Efficiency Gains
Comparison
Ultra Supercritical
1960 Vintage
Subcritical Reheat
Supercritical
Temperature
Early 20th Century Vintage
Subcritical Non-Reheat
1940 Vintage Subcritical
Non-Reheat
Entropy

14. Combustion Turbine
Technology

15. Combustion Turbine Technology

16. Combustion Turbine Cross- section

17. Combustion Turbine Technology
Combustion Turbine Technical Specifications
GE LM6000
GE 7E.03
GE 7F.06
GE 7HA.01
MHPS M501J
Net Output (MW)
45-58 91
270
280
327
Net Heat Rate (Btu/Kwh)
8619
10060
8250
8180
8322
Thermal Efficiency
39.6
33.9
41.4
41.7 41
Exhaust Temperature - Degrees C
455
552
593
626
636
Ramp Rate (MW/min) 50 40
Plant Turndown % 25 35 30

18. Combined Cycle Combustion Turbine
Technology

19. Combined Cycle Combustion Turbine (CCCT)

20. Combined Cycle Thermal Efficiency
 LM6000 SC
39.6% CC
51.9%
 501J
41.0%
61.5%

21. Combined Cycle Thermal Efficiency

22. Allam Cycle

23. Allam Cycle
To CO2 customer

24. How Does it Work? Very hot water 2.75% Hot water 2.75%
Oxygen 4.75% of mass
Cool water 2.75%
Pipeline ready CO %
Clean water 2.75%

25. Integrated Gas Combined Cycle (IGCC) Technology

26. Integrated Gas Combined Cycle

27. Kemper County IGCC 27

28. Reciprocating Internal Combustion Engines (RICE)

29. Wärtsilä 18V50SG

30. New Technology – Turbine Hall

31. Reciprocating Engines

32. Nuclear

33. B&W mPower Design

34. NuScale SMR Technology
NuScale design has achieved the “Triple Crown” for nuclear plant safety. The plant can safely shut-down and self-cool, indefinitely, with:
No Operator Action
No AC or DC Power
No Additional Water

35. NuScale Design 12 X 50MWe Compact 46-acre site
Separated Nuclear and Turbine Islands
All safety-related systems underground
One-to-one reactor to T/G alignment
Optimized for minimum staff and O&M
Water- or air-cooled condenser
Conventional steam cycle components

36. NuScale Design

37. 37