Xcel Energy's Colorado fuel mix in 2009 relied on coal for 52% of its energy, but was projected to increase to 68% coal reliance by 2010. Xcel also projected future rate increases from 2015-2020 assuming flat coal prices and no carbon charges, with 2010 electricity rates estimated between 9-10 cents per kilowatt hour. According to Boulder's greenhouse gas inventory, a significant portion came from electricity use and its source.

1. Xcel’s Colorado Fuel Mix 2009-2010 2009 52% Coal 2010 Projected 68% Coal

2. Source: KTH-5 (Xcel Witness Karen Hyde) Docket 10M-245E Colorado PUC Xcel’s Projections of Future Rate Increases 2015-2020 (Assuming no carbon charges and almost flat coal prices; 2010 rates between 9-10 cents/kwh)

3. Source: Annual Reports from Xcel to the City of Boulder

5. Boulder’s Greenhouse Gas Inventory Electricity… Source: City of Boulder Climate Action Plan Assessment July 2009 http://www.bouldercolorado.gov/files/Environmental%20Affairs/climate%20and%20energy/City_of_Boulder_ALL_SECTIONS_FINAL_072809_v9.pdf Electricity