LS Power Purchases Wyoming-Colorado Intertie

April 29, 2009 — LS Power announced the closing of its purchase of the rights to the Wyoming-Colorado Intertie Project. The Wyoming-Colorado Intertie Project consists of a proposed 850 MW transmission line extending approximately 180 miles between Laramie River Station Substation located at Wheatland, Wyo., and Pawnee Substation located at Brush, Colo. The Wyoming-Colorado Intertie Project will provide a transmission path to deliver high capacity-factor wind energy from Wyoming to load centers in Colorado. The Wyoming-Colorado Intertie Project is a public/private development partnership involving the Wyoming Infrastructure Authority and the Western Area Power Administration.

In August 2008, the Wyoming-Colorado Intertie announced the completion of its open season, which resulted in subscriptions for 585 MW of the project’s capacity. The remaining unsold capacity, 265 MW, is now being made available on an application basis in conformity with the WCI Open Access Transmission Tariff. In March 2009, Wyoming-Colorado Intertie filed its open season results and tariff for approval by the Federal Energy Regulatory Commission.

Acquisition of the Wyoming-Colorado Intertie represents another significant expansion of LS Power’s transmission development platform, which is being pursued to support the delivery of new renewable energy resources throughout the United States.

Subsidiaries of LS Power Transmission, LLC are advancing the development of other high-voltage transmission project including:
— Cross Texas Transmission: develop, build, own and operate approximately $400 million of 345 kV transmission facilities to support renewable energy as part of the Texas Competitive Renewable Energy Zone process
— The Southwest Intertie Project: the most advanced independent transmission project in the U.S., will enable a path for renewable energy to be delivered from the Midpoint hub in Idaho to load serving entities in Southern Nevada and the desert Southwest.
— The Overland Intertie Project: deliver wind energy from Wyoming to the Midpoint hub in Idaho, for delivery to the south on the Southwest Intertie Project, or to the west on other planned transmission at the Midpoint hub.

Paul Thessen, President of LS Power Development, LLC said, “Expansion into the transmission sector of the electric power industry is a major focus within LS Power due to the need to expand the transmission system in the U.S. to deliver renewable resources located in remote areas to load and to improve system reliability and efficiency. The Wyoming-Colorado Intertie is being driven by the strong need to deliver high-capacity factor wind from Wyoming to customers in Colorado. “

LS Power is a power generation and transmission group and has been involved in the development, construction, or operations of more than 20,000 MW of power generation throughout the United States. LS Power is actively developing both power generation and
transmission infrastructure to serve the need for new generation and improve the aging transmission system.

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