Kansas Renewable Energy & Efficiency Conference ‘07

1. Kansas Renewable Energy & Efficiency Conference ‘07 Smoky Hills Phase I Wind Project Update

2. TradeWind An Experienced Power Team • Founded 2001 • Lenexa, Kansas Based • Senior managers have 60+ years Utility and IPP experience • Directly managed - 5,300 MWs valued at over $5 Billion • 2,300 MWs of wind development in central USA Owned by local investors and Enel S.p.A.

3. TWE/Enel- Leaders in Renewable Power Development • TWE Form’s Strategic Alliance with Enel - 2006 • Enel S.p.A. is Italy’s Largest Electric Utility • $65 billion market capitalization • $51+ billion revenue • Over 53,000+ MW’s of electric generation worldwide • 19,000 + MW’s of renewable electric generation Enel will invest $ 6 billion in renewable energy worldwide

4. Smoky Hills – Centrally Located

5. Smoky Hills Development Highlights • 1st Met tower – June 2003 • Land leasing - 24+ months • Public meetings - multiple meetings ‘03 through ‘06 • Environmental evaluation • Power contracting – 2006 • Turbine selection – 3Q ‘06 • BOP selection – 3Q ‘06 • Start of construction 2Q ‘07

6. Environmental Due Diligence • TWE conducted the environmental work on this project with the assistance of the following groups and contractors: • TRC Mariah, Inc. • Burns & McDonnell, Inc. • Chatman & Associates, Inc. • United States Fish and Wildlife Service • Kansas Department of Wildlife and Parks • Kansas Department of Health and Environment • United States Corps of Engineers • Lincoln County, Kansas • Ellsworth County, Kansas

7. Environmental & Archeological • Environmental Studies conducted for the project: • Threatened and Endangered Species review and Critical Habitat Delineation (2005) • Raptor nest inventories (2005 and 2007) • Prairie Chicken Lek and population counts (2005, 2006, and 2007) • Wetland inventory mapping • Migratory corridor review • Cultural resources review • Paleontological Resources review

8. Smoky Hills Site • 250 MW site • Phased construction • 230 kV system • 22,000+ acres • 40 leases • I-70 good access for construction

9. Smoky Hills Project Construction Phase I-100.8 MW Smoky Hills Phase I Schedule I. Start – April 2007 II. Turbine erection – August 2007 III. Substation Complete – November 2007 IV. Commissioning & COD-December 2007

10. Vestas – V80 1.8 MW Turbines 56 Vestas V 80 1.8 MW Turbines Tower – 78 m / 13.5 ft diam Blade – 80 m diam. Tower – 197 tons Nacelle & rotor – 104 tons Turbine erection by Vestas

11. M.A. Mortenson – Balance of Plant MAM a leader in USA wind power construction Access Roads – 22 miles Underground cable – 22.5 miles Overhead line - 7 miles

12. Foundation Excavation ~ 15 feet deep

13. Rebar & Tower Bolt – 60+ Tons

14. Foundation Pour – 490 cubic yards

15. Foundation w/o Pedestal Pour

16. Kannapolis Rail Yard

17. Site Lay Down & Staging Yard

18. Tower Delivery – Area 2

19. Setting Tower Base Section

20. Setting Second Tower Section

21. Setting 1st Nacelle – September 21st

22. Blade Delivery ~ 131 feet

23. Avoided Emissions & Energy Production Smoky Hills Phase I Eliminates ~ 203,000 tons CO2/ year ~ 665 tons S02/year ~ 455 tons NOx/ year Energy supply equivalent to ~35,000 homes

24. Smoky Hills Energy Supply Customers Over 235,000 customers will benefit from Smoky Hills renewable energy Phase I Power Purchasers Include : Sunflower Electric – Hays, KS Board of Public Utilities – Kansas City, KS Midwest Energy – Hays, KS All Phase I energy will be consumed in Kansas

25. Economic Development Benefits Smoky Hills will bring significant economic benefit to central Kansas Over 150 construction jobs – at peak $14 million in local spending during construction Over $ 16 million to county government & local land owners Over $ 8 million in salary & benefits for operations staff