Supporters of wind and hydro power in Washington state are at odds over which energy source should power down to prevent overproduction, which could lead to blackouts. Some local officials say wind farms should power down because hydro costs less, while supporters of wind energy say cost comparisons are not fair, since hydro power has been around for decades. "The wind projects have identified their customers and have agreements to deliver a certain amount of energy. Excess energy from hydro is just in the market [not needed to serve their local customers]," said Rachel Shimshak, executive director of Renewable Northwest Project.
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