Colorado utilities regulators will consider the new plan, which was revised in hopes of capturing lucrative renewable energy credits while slashing greenhouse gas emissions... Xcel Energy has a vision for Colorado’s clean energy future — one independent power producers, consumer advocates and regulators didn’t see coming — a vision that is both expensive, with a $15 billion price tag, and unparalleled in its sweep. Xcel Energy’s preferred electric resource plan submitted to the Colorado Public Utilities Commission in September includes 7,100 megawatts of new generation and storage, mainly wind and solar and nearly $3 billion in new transmission lines. “We...