AZ Power -- Planning for Arizona's Future

PW-SEV/BRG 500kV project background

Below is some background on the Pinal West to Southeast Valley/Browning 500kV transmission project, including construction information, schedules, requests for reconsideration, hearings and transcripts, and more.

About the project

The Pinal West to Southeast Valley/Browning project (PW-SEV/BRG) is composed of new 500 kilovolt (kV) and 230 kV transmission lines and substations that will serve Pinal, Pima and Maricopa Counties.

The project is planned jointly by the Salt River Project Agricultural Improvement and Power District (SRP), Tucson Electric Power Company, Electrical District Number 2, Electrical District Number 3, Electrical District Number 4, and Southwest Transmission Cooperative Inc. The project is managed by SRP.

The project involves:

  • Transporting power from the Pinal West (PW) substation in western Pinal County southwest of the City of Maricopa to a new 500 kV substation that will interconnect with the existing Santa Rosa substation located south of the Ak Chin Indian Community.
  • From the Santa Rosa substation, a double circuit 500/230 kV line will extend to the permitted Pinal Central substation located east of the Pinal County Fairgrounds.
  • From the Pinal Central substation, a double circuit 500/230kV line will continue north through the City of Coolidge to the permitted Abel substation located in the northern portion of Florence.
  • From the permitted Abel substation a double circuit 500/230kV transmission line connects to the Dinosaur 230/69 kV substation located in Pinal County northeast of the town of Queen Creek. A 500/230 kV transmission line which was energized in 2007, continues on to the existing Browning substation in east Mesa.

ACC approves SRP's request for 230kV/500kV consolidation

On Dec. 8, 2006, the Arizona Corporation Commission issued an Order (Decision No. 69183) approving SRP's request to construct a 230kV circuit on the 500kV structures to be built along the Pinal West to Southeast Valley certificated route in Casa Grande. Specifically, SRP will add a 230kV circuit to the 500kV structures at a point on Cornman Road near the intersection with Thornton Road and continue east along the route to the future Pinal Central (formerly Pinal South) substation.

The request was made in compliance with Condition 23 of the Pinal West to Southeast Valley CEC (Decision No. 68093). The 230kV circuit is part of the planned Desert Basin 230kV Power Line Project. SRP was awarded a CEC application for the portion of the Desert Basin 230kV Power Line Project exiting the Desert Basin Generating Station and continuing south for approximately six miles to intersect with the 500kV corridor.

Find out more about the Desert Basin 230kV project.

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SRP submits compliance filing for PW-SEV/BRG 500kV project condition

View SRP's Aug. 11, 2006 filing:

SRP provided a public notice of this request to landowners located within the allowed corridor along the certificated route from the intersection of Burris and Cornman Roads to the future Pinal Central (formerly Pinal South) Substation. View the public notice and ACC's approved route map.

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Requests for reconsideration

Since the CEC was approved by the ACC, four requests for reconsideration were submitted.

On Sept. 28, 2005 the ACC held a special open meeting for the purpose of considering the four Applications for Rehearing of Decision No. 68093. The Pulte Homes' Application for Rehearing/Reconsideration was the only application discussed at the meeting. The other applications were deemed denied due to lapse of time.

View the requests:

Following discussion of the Pulte Application for Rehearing/Reconsideration, the Commissioners voted unanimously to grant the Pulte application and to consider the request for an expanded corridor width for the area from Node 81 south to the northern bank of the Gila River at a future ACC meeting to be determined. The Commissioners requested that Pulte and interested parties file a brief with the ACC clarifying their position on the Pulte request within 10 days.

View the briefs filed in the Pulte request for reconsideration:

The ACC held a special open meeting Nov. 9, 2005 at which the Commission voted unanimously on the Pulte request for reconsideration of the CEC decision. The amended decision extends the 500kV transmission line corridor width to a half mile on the east side of the centerline of the Valley Farms/Cooper Road section line, but for only the area that is north of the state land to the Union Pacific Railroad. Pulte's original request was to expand the corridor width to include the state land as well as the land located south of the state land to the north side of the Gila River.

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Hearings conducted

Line Siting Committee hearings 2004-05
The public was invited to participate in public hearings before the Arizona Power Plant and Transmission Line Siting Committee on the following dates:

  • Nov. 29-30, 2004 (overview)
  • Dec. 16-17, 2004 (Area A)
  • Jan. 7, 2005 (Area A)
  • Jan. 10-11, 2005 (Area B)
  • Feb. 14-15, 2005 (Area C)
  • March 9-10, 2005 (Area C)
  • March 22-23, 2005 (Area C)
  • April 8, 2005 (Area C)
  • April 14-15, 2005 (Area C)
  • May 10, 2005 (final)
  • June 7, 2005 (hearing reopened) - View details

On May 10, 2005, the siting committee recommended a CEC for the project.

Arizona Corporation Committee hearings
The public was invited to participate in public hearings before the ACC on the following dates:

  • July 13, 2005
  • July 20, 2005 (special public comment session held in Casa Grande)
  • Aug. 15-16, 2005

The ACC voted unanimously to confirm a CEC for the project on Aug. 16, 2005.

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Route tours completed

A tour of the Area A route was conducted on Jan. 20 (view a tour map - 211K PDF*). A tour of Area B was conducted March 2 (view a tour map - 1MB PDF*). A tour of Area C, Option 1 was conducted March 29 (view a tour map - 8.7 MB PDF*)

Hearing transcripts

Copies of transcripts from the following CEC hearings can be viewed at the Casa Grande Public Library:

  • Nov. 29-30, 2004
  • Dec. 16-17, 2004
  • Jan. 7, 10-11, 2005
  • Feb. 14-15, 2005
  • March 9-10, 2005
  • March 22-23, 2005
  • April 8, 2005
  • April 14-15, 2005
  • May 10, 2005
  • June 7, 2005

The library is located at 449 N. Dry Lake in Casa Grande.

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CEC application

On Oct. 7, 2004, SRP submitted an application for a Certificate of Environmental Compatibility (CEC) with the Arizona Corporation Commission (ACC) for the Pinal West to Southeast Valley/Browning (PW-SEV/BRG) project.

You can view selected parts of the application online:

A complete copy of the application, including detailed maps of the proposed project, is on file with Docket Control Center of the Arizona Corporation Commission at:

Arizona Corporation Commission
1200 West Washington, Suite 108
Phoenix, AZ 85007

Copies of the application are also available for inspection at the following locations:

  • City of Casa Grande Public Library - 449 N. Dry Lake, Casa Grande

  • City of Coolidge Public Library - 160 W. Central Avenue, Coolidge
  • City of Maricopa Public Library - 44240 W. Maricopa, Maricopa
  • City of Eloy Public Library - 100 East Seventh Street, Eloy
  • City of Queen Creek Public Library - 22407 S. Ellsworth Road, Queen Creek
  • City of Apache Junction Public Library - 1177 North Idaho Road, Apache Junction
  • City of Mesa Public Library - 64 East First Street, Mesa
  • City of Florence Public Library - 1000 South Willow Street, Florence

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Detailed project maps

View the most recent maps of the PW-SEV/BRG project below in PDF* format. For closer detail, please use the magnifying glass icon centered at top of the map to zoom in.

Approved route map - Modified route approved by ACC on Aug. 16, 2005 (1.6MB PDF*)

Recommended route map - Route recommended by siting committee on May 10, 2005 (969K PDF*)

Preferred alignments and alternatives - submitted with the CEC application Oct. 7, 2004 (492K PDF*)

Study area:

The maps below show maps of the larger study area including both the PV-PW and PW-SEV/BRG projects.

PV-SEV/BRG (formerly PW-SEV/BOB) project study area
Web version   PDF version* (534K)

CATS/PV-SEV map (672K PDF*)

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Project origin

As a result of the Central Arizona Transmission System (CATS) Study, new power transmission capacity is planned for central Arizona. A study of regional scope was collaboratively prepared by 18 public and private utility companies, with participation by the Arizona Corporation Commission.

The objective of CATS is to analyze system reliability, capacity and increasing demand for energy delivery in Arizona, and to plan for any additional required transmission.

The project began as one but was divided into two projects, Palo Verde to Pinal West (PV-PW) and Pinal West to Southeast Valley/Browning (PW-SEV/BRG).

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Siting and public process

An extensive siting process was conducted for the PV-PW and PW-SEV/BRG projects to determine the most appropriate location for each within an approximate 2000-square-mile study area (534K PDF).

History of Public Meetings for PV-PW and PW-SEV/BRG 500kV Projects

Type of Meeting Meeting Date Meeting Location
Phase 1 Open House July 16, 2002 Casa Grande, AZ
Phase 1 Open House July, 17 2002 Coolidge, AZ
Phase 1 Open House July 18, 2002 Apache Junction, AZ
Phase 1 Open House July 23, 2002 Maricopa, AZ
Phase 1 Open House July 24, 2002 Arlington, AZ
Phase 2 Open House October 8, 2002 Casa Grande, AZ
Phase 2 Open House October 9, 2002 Coolidge, AZ
Phase 2 Open House October 10, 2002 Queen Creek, AZ
Phase 2 Open House October 15, 2002 Maricopa, AZ
Phase 2 Open House October 16, 2002 Stanfield, AZ
Phase 3 Open House December 9, 2002 Casa Grande, AZ
Phase 3 Open House December 10, 2002 Coolidge, AZ
Phase 3 Open House December 11, 2002 Queen Creek, AZ
Phase 3 Open House December 12, 2002 Maricopa, AZ
Phase 3 Open House December 16, 2002 Arlington, AZ
Public Information Meeting February 13, 2003 Mobile, AZ
Public Information Meeting November 17, 2003 Mobile, AZ
Developer Workshop June 1, 2004 Scottsdale, AZ
Developer Workshop June 2, 2004 Scottsdale, AZ
Developer Workshop June 3, 2004 Scottsdale, AZ
Phase 4 Open House July 26, 2004 Casa Grande, AZ
Phase 4 Open House July 27, 2004 Coolidge, AZ
Phase 4 Open House July 28, 2004 Queen Creek, AZ
Phase 4 Open House July 29, 2004 Maricopa, AZ
Neighborhood Meeting August 26, 2004 Hidden Valley, AZ
Open House September 9, 2004 Hidden Valley, AZ
Open House September 30, 2004 Hidden Valley, AZ
Browning 500kV/230kV Construction Open House Nov. 2, 2006 Mesa, AZ

Visit the Arizona Corporation Commission (ACC) Web site for answers to frequently asked questions about transmission line siting.

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EMF information

Electromagnetic fields (EMF): Please visit one of the following Web sites for more information about EMF:

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Contact us

If you have questions or comments about the project, please contact us.Comuníquese con nosotros

E-mail: Send questions to webmaster@azpower.org.

Telephone: Call SRP Public Involvement at (602) 236-2872 or (800) 380-6123

Information request form: For questions about the project, complete our online request for information form.


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*To view PDF files, you'll need Adobe Acrobat Reader if you don't have it. It is free and you will only need to download it once. Then, return to this page to view the report sections and maps.

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