MidAmerican Energy Holdings to Acquire Illinois Wind Farm from Invenergy

Bishop Hill II is located near the town of Galva, approximately 40 miles northwest of Peoria, Ill. Construction began in fourth quarter 2011, and Bishop Hill II is expected to be in commercial operation in fourth quarter 2012. Ameren Illinois will purchase the electricity from the project pursuant to the terms of a 20-year power purchase agreement.

Bishop Hill II is the second phase of Invenergy’s Bishop Hill Wind Energy Center. The first phase, Bishop Hill I, also is under construction in Henry County and is due to commence commercial operations in 2012.

"We are pleased to reach this agreement with MidAmerican and look forward to working together to make the Bishop Hill Wind Energy Center the pre-eminent wind project in Illinois," said Michael Polsky, president and CEO of Invenergy. Invenergy has developed and placed in-service 26 wind farms in North America and Europe.

"Wind energy is a renewable generation source that meets current and future energy needs in an environmentally efficient and cost-effective manner," said Greg Abel, chairman, president and CEO of MidAmerican Energy Holdings Company. "The Bishop Hill II wind project fits our model of investing in the renewable energy sector."

MidAmerican is the No. 1 rate-regulated utility owner of wind-powered generation capacity in the U.S. The addition of the Bishop Hill II wind project demonstrates MidAmerican’s commitment to environmental respect and renewable energy.

MidAmerican began building wind energy projects in 2004. Its first wind project was constructed in Iowa. The company has built or acquired more than 3,300 megawatts of wind generation. MidAmerican has invested approximately $6 billion in wind-powered generation, with projects in Iowa, Wyoming, Washington and Oregon.

MidAmerican Energy Holdings Company MidAmerican Energy Holdings Company, based in Des Moines, Iowa, is a global provider of energy services. Through its energy-related businesses, MidAmerican provides electric and natural gas service to more than 6.9 million customers worldwide. These businesses are Pacific Power, Rocky Mountain Power and PacifiCorp Energy, comprising PacifiCorp; MidAmerican Energy Company; Northern Powergrid Holdings Company; Northern Natural Gas Company; Kern River Gas Transmission Company; and CalEnergy.

Invenergy Invenergy and its affiliated companies develop, own and operate large-scale renewable and other clean energy generation facilities in North America and Europe. Invenergy is committed to clean power alternatives and continued innovation in electricity generation. Invenergy’s home office is located in Chicago, and it has regional development offices throughout the U.S., Canada and Europe. Invenergy and its affiliated companies currently have more than 6,700 megawatts of wind energy, solar power and thermal projects under contract, in construction, or in operation.

www.midamerican.com

www.invenergyllc.com