Happy Valley Substation is a 500kV substation located in Happy Valley, Arkansas, US.

The Happy Valley Substation project’s construction is expected to begin in 2022. The works are expected to be commissioned in 2024.


Happy Valley Substation project, which is an upgrade substation, will be operated by Entergy Arkansas.

The designed voltage level of the substation is 500kV and the operating voltage level is 500kV.

The step-in voltage of the project is 500kV. Upon completion, the substation will have a capacity of 750MVA.

Happy Valley Substation project development status

The project is expected to be commissioned in 2024. Approximately $172.56m was financed by the authorities to undertake the construction works of the project.

About Entergy Arkansas

Entergy Arkansas Inc (Entergy Arkansas), a subsidiary of Entergy Corporation is an electric utility that generates, transmits and distributes electrical power. The utility’s services include site selection and project management services, research and engineering services, large project services and contract services. It also offers customer services, bill payment options, energy audits, customized commercial and industrial programs, electrical safety, builder services and energy conservation services, among others. Entergy Arkansas distributes electricity to residential and commercial customers. The utility serves the eastern and central Arkansas counties.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.