Resource Portfolio Fuel Mix 2011

Idaho Power obtains energy from a diverse set of generation resources, long-term power purchase agreements, and short-term market purchases. The estimated fuel mix for Idaho Power’s resource portfolio1 in 2011 is shown below2.

Fuel Percentage

1 Long-term power purchases with a known fuel source have been identified by fuel type, market purchases have been assigned the Northwest Power Pool.

2 This is an estimate of the fuel mix of Idaho Power’s portfolio of generation supply, including market purchases. Fuel mix percentages may not total 100 percent due to rounding. Because Idaho Power intends to sell the Renewable Energy Certificates (RECs) that it owns in the near-term with proceeds benefiting retail customers, and since Idaho Power does not own the RECs for the other qualified renewable resources represented in the above Resource Portfolio Fuel Mix table and chart, Idaho Power cannot and does not represent that electricity produced by this fuel mix is being delivered to its retail customers in 2011. For more information on the energy delivered to our retail customers see Electricity Delivered to Customers.

3 Combination of industrial waste and other forms of waste.