CSP plant Hualapai Valley receives environmental certification

The CEC was the last approval for the project developer Mohave Sun to begin construction of the power plant. Beside the plant itself, the CEC approves interconnection and transmission plans.

The Hualapai Valley plant got the approval to use wastewater for an evaporative cooling system. The ACC expressed that Hualapai is likely to be the last project that gets approval to use water cooling. Due to the limited water resources in the area, further power plants will have to use dry cooling, which is more expensive. Hualapai Valley Solar and the nearby city of Kingman are evaluating possible sources for wastewater. Since a binding Memorandum of Understanding in December 2009, both sides are working on a water purchase agreement that would supply more than half of the water needed for the power plant. The source would be the city’s Hilltop Wastewater Treatment Plant that treats about 1.5 million gallons of wastewater per day. The agreement for the output of the Hilltop facility is expected to go before the City Council within this year. The CEC also allowed Mohave Sun to use a hybrid (water/air) cooling system if sufficient wastewater is not available.

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