(Bloomberg) -- Regulators approved a $4.5 billion transmission line that will deliver Canadian hydropower to New York City, a key component of the Empire State’s efforts to eliminate carbon from its power grid by 2040.

The 339-mile (546-kilometer) Champlain Hudson Power Express is expected to be complete in 2025, according to a statement Thursday from New York Governor Kathy Hochul. The Public Service Commission also approved Clean Path NY, a project comprising more than 20 wind and solar farms and a second transmission line.

The biggest U.S. city gets about 85% of its electricity from burning fossil fuels, and efforts to use more renewables have been hindered by a lack of transmission lines. The two projects, the largest approved in the state in 50 years, are expected to reduce that reliance by more than half by 2030. 

“Today’s historic decision by the Public Service Commission is a game-changer for New York’s transition away from fossil fuels,” Doreen Harris, president of the New York State Energy Research and Development Authority, said in the statement. 

The Champlain Hudson line will carry 1,250-megawatts of electricity from hydropower facilities in Canada owned by Hydro-Quebec, enough for more than 1 million New York homes. 

“This decision has New York State and Quebec taking one giant step together towards climate progress with a project that is a model for equitable clean energy infrastructure,” Hydro-Quebec Chief Executive Officer Sophie Brochu said in an emailed statement from Transmission Developers Inc., the Blackstone-backed company behind the power line. 

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