Marigold Energy Center

About the project

SRP is planning the Marigold Energy Center, a mixed generation and storage facility project designed to meet near-term energy and capacity needs in central Arizona.

Plans are anticipated to include:

	A 230-kilovolt (kV)/500 kV substation
	Approximately 4 miles of new 230 kV transmission lines
	600 megawatts (MW) of solar generation
	400 MW of battery energy storage
	Up to 675 MW of gas-fired generation

This project will build on SRP’s commitment to provide Arizona with reliable and affordable power to keep up with economic growth. The project has the potential for collaboration with Electrical District No. 3 (ED3), a regional public power utility serving the communities of Maricopa, Stanfield and the surrounding area. ED3 is evaluating a potential partnership with SRP to procure a portion of the energy generated by the Marigold Energy Center, enhancing its ability to serve local customers with reliable and competitively priced electricity.

Why is this project needed?

When completed, these generation and transmission resources will strengthen the power grid and help ensure that SRP can meet the electricity demand of a rapidly growing population. This combination of technologies will provide flexible, dispatchable capacity to support the growing customer base in Maricopa and Pinal counties while enhancing grid reliability and enabling the integration of intermittent renewable energy resources.

Power Plant and Transmission Line Siting Committee Hearing

A public hearing will be held before the Arizona Power Plant and Transmission Line Siting Committee as follows:

Francisco Grande Hotel & Golf Resort
12684 W. Gila Bend Highway
Casa Grande, AZ 85193

The hearing will commence on Sept. 21 at 10 a.m. and will continue each weekday starting at
9 a.m. through Sept. 25 as necessary. The hearing schedule may be adjusted if the Committee elects to conduct a site tour.

Public comment will be taken in a special evening session:
Sept. 21 at 5:30 p.m.
(in person or via telephone or Zoom)

Public comment may also be taken at other times during the hearing at the discretion of the committee chair.

If any revisions to the hearing schedule are required, they will be noticed on the Arizona Corporation Commission (ACC) website at Hearings and Meetings | Arizona Corporation Commission (Opens in a new tab) or on this project webpage. Below is the Notice of Hearing filed with the ACC.