American Electric Power Company Inc. said Tuesday it is considering a multibillion-dollar project aimed at harnessing wind energy through a “transmission superhighway.”

The Columbus-based utility said it is in the conceptual phase of the proposal, which would require construction of more than 1,000 new miles of transmission lines and cost between $5 billion and $10 billion. The 765-kilovolt lines would connect wind farms in the upper Midwest – the Dakotas, Minnesota and Iowa – to an existing network that ends near Chicago.

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