Transco has filed an application with the Federal Energy Regulatory Commission (FERC) for its $1 billion Northeast Supply Enhancement project, which would move an additional 400,000 dekatherms per day of incremental firm transportation capacity to the Northeast.

The wholly owned subsidiary of Williams Partners LP (NYSE: WPZ) has agreed with subsidiaries of National Grid—the largest distributor of natural gas in the northeastern U.S.—for firm transportation service. When complete, the project will serve 1.8 million customers served by National Grid in Brooklyn, Queens, Staten Island and Long Island, among others in the region.

The project will consist of approximately 10 miles of 42-inch pipeline looping facilities, three miles of onshore 26-inch looping facilities, 23 miles of offshore 26-inch looping facilities, the addition of 21,902 horsepower at an existing compressor station; a new 32,000 horsepower compressor station; and related facilities.

“Customers and businesses in the local communities that we serve in New York City and on Long Island benefit from affordable, clean and reliable energy,” said Ken Daly, President, National Grid New York, in a statement. “Williams’ Northeast Supply Enhancement project expands on our commitment to further improve reliability, make available much-needed gas capacity to support job growth, and help reduce our carbon footprint. This project complements the existing Brooklyn Queens Interconnect/Rockaway Lateral Project, which was completed last spring, and was the first new gas supply delivery point in decades for National Grid customers in this region.”

The rising demand for natural gas in New York is tied to Mayor Bill de Blasio’s goal of cutting the city’s emission 80% by 2050. To accomplish this, New York intends to phase out No. 4 fuel oil by 2030.

“As demand for natural gas increases, the importance of the associated energy infrastructure becomes even more critical,” said Rory Miller, senior vice president of Williams Partners’ Atlantic-Gulf operating area. “The Northeast Supply Enhancement project will add critical infrastructure necessary to meet the region’s growing demand for natural gas while helping reduce air emissions.”