Grid management and improvement projects
Generating power: SRP power plant projects
Discover the major power plants and generating facilities we’re planning, siting and constructing to meet the Valley’s energy needs.
Coolidge Generating Station
The Coolidge Expansion Project (CEP) will position SRP to meet increasing energy needs, add more renewable resources, and maintain the power grid well into the future.
Learn moreCopper Crossing Energy and Research Center
The proposed continued development will complement the existing solar generation at the site and is expected to feature generating resources needed to support and enable SRP's transition to a lower carbon resource portfolio.
Learn moreCoronado Generating Station Repowering Project
SRP will convert the Coronado Generating Station (CGS) from coal to natural gas. To support this conversion, a new lateral natural gas pipeline will be permitted and constructed by a third-party gas supplier.
Learn moreMarigold Energy Center
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.
Learn moreSpringerville Generating Station
SRP announced its intent to repurpose SGS from coal-powered to natural gas-powered. To support this effort, SRP plans to cease coal generation at the site and complete the conversion to natural gas by late 2029.
Learn moreStoring power: Pumped storage hydropower
Pumped storage hydropower is a type of hydroelectric energy storage that can help increase SRP’s supply of affordable and reliable energy.
Salt River Pumped Storage Project
SRP is exploring opportunities to expand hydropower on the existing Salt River reservoir system.
Learn moreCarrying power through the Valley: SRP transmission projects
These projects are in progress to site, build, update or maintain the electric system that distributes power from power plants to substations around Arizona.
Voltage: 230 kV & 500 kV | Phase: Approved
South Mountain Transmission Project
SRP is proposing to build new 500/230/69-kilovolt (kV) substation, two sets of new overhead double-circuit 230 kV transmission lines, and two new sets of overhead 500 kV transmission lines.
Learn moreVoltage: 230 kV | Phase: Complete
Abel-Pfister-Ball
SRP has built the 20-mile, double circuit 230 kV transmission line. The new transmission will connect to a future substation named Pfister.
Learn moreVoltage: 230 kV | Phase: Complete
High-Tech Interconnect Project (HIP)
A transmission project that will provide reliable power to the recently announced $20 billion expansion of Intel's Chandler campus.
Learn moreVoltage: 230 kV | Phase: Complete
Project Huckleberry
A half-mile 230 kV transmission line and substation required to provide reliable power to serve Meta's data center located at the southeast corner of Elliot and Ellsworth roads in Mesa.
Learn moreVoltage: 230 kV | Phase: Construction
Project Red Hawk
Formerly the Allium Project. SRP will provide energy services and infrastructure to a commercial customer on its 187-acre parcel for a data center located in east Mesa, Arizona.
Learn moreVoltage: 230 kV | Phase: Complete
Southeast Power Link
SRP has built 7 miles of new overhead 230 kV power lines and a new 230/69 kV receiving station. A half-mile of the approved route is located in Queen Creek with the remainder in Mesa.
Learn moreVoltage: 115 kV | Phase: Design
Superior - Silver King Relocation
At the request of Resolution Copper Mining, LLC, SRP will relocate approximately 1 mile of an existing 115 kV line on Resolution's property.
Learn morePermitted corridors
See our 500 kV projects that are permitted but not yet in design or construction.
- Palo Verde - Pinal West: Project will allow SRP to construct a second single-circuit 500 kV line from the Hassayampa Switchyard to the Pinal West Substation. Learn more
- Palo Verde - Saguaro: Project will allow for construction of a 500 kV transmission line from the Palo Verde Generating Station to the Saguaro RS.
- Saguaro - Winchester: Project will allow for construction of a 500 kV line from the Saguaro Generating Station to the Winchester Substation.
- Pinnacle Peak - Brandow: Project will allow SRP to co-locate a circuit on the existing Pinnacle Peak - Brandow/Papago Buttes 230 kV line.
Bringing power to your home: SRP distribution projects
Explore the power line projects we’re working on to help ensure efficient and safe delivery of electricity to homes and businesses.
Humphrey-Turpen 69 kV Transmission Project
We're building a 69 kV line that will connect from the Humphrey Substation on Riggs and Lindsay roads to the Turpen Substation on Appleby and Lindsay roads.
Learn moreHonor-Pico Project
We're constructing a new 69 kV transmission line that will connect from the existing Honor Switchyard located near 36th Street and McDowell Road to the Pico Substation located near 52nd Street and McDowell Road.
Learn moreAnderson Wilkins, Bartlett Parker, Bartlett Wilkins 69kv Project
We're building a 69 kV line that will connect from the Anderson Substation at 7th Avenue and Baseline Road to the Wilkins Substation at 48th Street and Southern Avenue; a second 69 kV line that will connect Bartlett Substation at 40th Street and Fremont Street to the Parker Substation at 40th Street and Wier Avenue; and a third 69 kV line that will connect Bartlett Substation at 40th Street and Fremont Street to the Wilkins Substation at 48th Street and Southern Avenue.
Learn moreHow the electric grid works
The electrical grid is a highly complex system that delivers electricity to homes and businesses. It can be broken down into three key steps:
Generation
Electricity starts at a generator, which can be powered by fossil fuels, wind turbines, solar panels, water or nuclear reactors.
Transmission
After power is generated, it moves throughout the Valley through transmission lines – those large power lines you often see along the road.
Distribution
Electricity travels through overhead or underground power lines and into your home.
Developing the next-generation power grid
Grid enhancements will include quicker outage restoration, improved cybersecurity and better integration with renewable sources.
SRP projects at your home
To maintain the power grid and ensure reliable delivery to your home, it’s critical to allow SRP crew members access to equipment for repairs and maintenance.
See what to expect and how to prepare for SRP's cable replacement and maintenance process.
- First, we’ll need access. If we need to access equipment in your yard, we’ll send a letter, leave a door hanger or call you to let you know. We do our best to inform you in advance; however, our crews may need immediate access during planned maintenance, emergencies or storm-related damages and outages. When we arrive to do the work, a crew member will knock on your door and announce their intentions before starting the work. See how to verify that crew members are from SRP.
- We try our best to avoid outages. It's possible that a line may need to be de-energized while work is being done. You may be affected by a brief outage, but in most cases, this will only be for a short period of time. If a new wire is being installed, another outage may be necessary at a later date. In that case, SRP will notify you at least two days in advance of the planned power outage.If you have a medical condition and depend on a medical device that requires electricity, please contact the Public Involvement Agent listed on your construction phase letter for more information.
- Sometimes digging is necessary. Digging is necessary when working on an underground electrical conduit. Our designers will always choose the path of least resistance and work to avoid conflict with existing underground structures.
At the end of a project, our team is dedicated to restoring a site to its former state as best as possible. - We’re available — and happy — to resolve any issues. Our Public Involvement Representative will send a series of letters including the SRP Public Involvement Representative responsible for your project. Please contact the Representative listed on your letter and we’ll be happy to address your concerns as soon as possible.
Still have questions?
We’d love to provide answers. Give us a call at (602) 236-2872(602) 236-2872 to get in touch.
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