Expanding flexible generation to meet Arizona’s growing electric demand

Arizona’s rapid population and economic growth are increasing electricity demand across the Phoenix area. To maintain reliable supply while supporting a more dynamic grid, Salt River Project (SRP) is expanding its Coolidge Generating Station with an additional 600 megawatts of fast-start natural gas capacity. 
 
The expansion will include 12 advanced gas turbines with evaporative cooling, along with major supporting infrastructure, including a new water treatment facility capable of processing 1,500 gallons per minute, four deep raw-water wells and two additional natural gas supply yards. 
 
The project also introduces significant transmission and substation upgrades, including an expansion to the 230-kilovolt system, a new 500-kilovolt substation, generator step-up transformers, new 500-kilovolt lines connecting the facility to the regional grid and associated control and monitoring assets. Together, these upgrades will strengthen system flexibility and support reliable power delivery across SRP’s service territory. 

Jacobs delivers project engineering services through a staff augmentation agreement with SRP, providing experienced technical engineering and project management professionals to support project planning and execution. 
 
By combining extensive experience in gas turbine generation and power delivery projects with large-scale construction and program management expertise, Jacobs is supporting SRP to accelerate development of the expansion while maintaining technical rigor, budget controls and project oversight. This collaborative approach strengthens delivery confidence for a complex multi-system expansion, enabling SRP to bring new flexible generation online to support the region’s growing energy needs.