Ocotillo Modernization

APS is planning to modernize the Ocotillo Power Plant in Tempe. The proposed project will create a cleaner-running, more efficient plant using advanced technology. APS intends to install five combustion turbines powered by natural gas. Two existing 1960s-era units will be removed.
 
The project is critical to the Phoenix metro area and provides several benefits. It supports service reliability, improves the plant’s appearance, is better for the environment, creates construction jobs and adds additional tax revenue to the local economy.
 
We welcome feedback from the public about the project. Please complete the form below to share your comments or be added to the mailing list. 

Ocotillo Modernization Snapshot

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Line Siting Committee Approves Ocotillo Project CEC

The Arizona Power Plant and Line Siting Committee granted a Certificate of Environmental Compatibility (CEC) for the Ocotillo Modernization Project at the end of a three-day hearing Thursday, Sept. 18. The committee voted 6-0 with one abstention to approve the application from APS. As issued, the CEC authorizes ...

September 19, 2014
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Public Hearing Set to Begin for CEC Application

A public hearing regarding the Ocotillo Modernization Project will begin Tuesday, Sept. 16, at 9:30 a.m. at the Embassy Suites Phoenix - Tempe, 4400 S. Rural Road in Tempe. The Arizona Power Plant and Transmission Line Siting Committee is conducting the hearing to consider a Certificate of Environmental ...

September 15, 2014
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Five Companies Selected for Ocotillo RFP Solicitation

APS announced that five companies successfully completed the pre-qualification process for the Ocotillo Modernization Project request for proposal (RFP). Each company was invited by APS to participate in the RFP process, which will select a contractor to install five simple-cycle gas turbine generators and related ...

August 15, 2014
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Public Hearing Dates Announced for Ocotillo CEC Application

The Arizona Power Plant and Transmission Line Siting Committee will hold a public hearing beginning Sept. 16 to consider a Certificate of Environmental Compatibility (CEC) application for the Ocotillo Modernization Project. APS filed the CEC application with the Arizona Corporation Commission (ACC) on July 31. The ...

August 06, 2014
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APS Submits Ocotillo Application to Arizona Corporation Commission

APS has filed a Certificate of Environmental Compatibility (CEC) application for the Ocotillo Modernization Project with the Arizona Corporation Commission (ACC). As part of the application, APS evaluates environmental factors such as water use, existing and future land uses at the plant site, cultural ...

August 01, 2014
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FAQs

What is the project timeline?
APS plans to file applications for project permits this spring and summer. Construction on the new units, if approved, would begin in 2016 and be completed in 2018. Removal of the old units would begin in 2018.
 
Why upgrade the Ocotillo plant?
The Ocotillo plant is critical to maintain service reliability in the Phoenix metro area because of its location. We can also improve an existing plant without changing its overall footprint and replace generators that are increasingly costly to operate and maintain. Many replacement parts are no longer available for the steam generators and must be custom-made to keep equipment running.
 
What will be the environmental benefits?
Replacing the obsolete steam generators with much newer, proven, cleaner technology will greatly improve the plant’s efficiency. The new units will decrease the plant's water-use and emission rates. They will also improve the plant's overall noise conditions.
 
How tall will the new structures be?
The plant currently has four 178-foot stacks, while the upgraded plant is planned to have five stacks about half as tall. This would significantly reduce the plant’s visibility from several locations. 

What economic benefits will the project provide?
It will create local jobs – we expect the project to require an average of 114 jobs during construction. Total property taxes for the upgraded plant are expected to increase to about $8 million by the fifth year of operation. APS currently pays about $600,000 in total property taxes for Ocotillo.

How can I get involved in the project? 
APS is committed to a transparent public process. The public can submit comments on the project through the form above. In addition, we will hold a public open house to provide information and take comment.

View more FAQs about the Ocotillo modernization project.
 

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