Electric utility firm CenterPoint Energy has unveiled plans to upgrade existing and build new electric transmission infrastructure to meet the growing demand from the petrochemical industry along the Texas Gulf Coast.

CenterPoint has submitted a proposal to the Electric Reliability Council of Texas (ERCOT) for the $250m transmission project, which will serve petrochemical industry in the Freeport, Texas area.

The project will expand the utility’s capacity in the region to around 1,340MW, which can be operational at different stages between 2017 and 2019.

The proposed enhancements are expected to complete by summer 2019, while proposed new line is anticipated to start service in 2021.

CenterPoint will upgrade two existing substations, in addition to building new 345 kilovolt double-circuit transmission line.

CenterPoint Energy's electric operations senior vice president Kenny Mercado said: "We are fortunate to serve an area that continues to experience growth and expansion in the petrochemical industry.

"This project is critical to reliability due to the magnitude of new load being added to the area."

Earlier this year, CenterPoint had acquired Atmos Energy's retail energy services business, Atmos Energy Marketing.

The acquired business allowed CenterPoint to deliver about one trillion cubic feet of natural gas to around 100,000 customers per annum.

Based in Houston of Texas, CenterPoint provides electric transmission and distribution, natural gas distribution and energy services.

With around 7,700 employees, the company provides services to about five million metered customers in Arkansas, Louisiana, Minnesota, Mississippi, Oklahoma, and Texas.