ACC Biennial Transmission Assessment

Ed BeckSuperintendent, Planning

Tucson Electric Power

2008 - 2017

South

Vail

Greenlee

Westwing

TEP Service Area

North Loop

Irvington

500 kV345 kV

Voltage

TEP EHV System Additions TEP EHV System Additions Springerville

Winchester

Tortolita

SaguaroPinal West

2008

Pinal Central

2011

TEP EHV Studies• Pinal West interconnection as well as Pinal

Central (South) to Tortolita have been part of WECC base cases, SATS, SWAT, and WestConnect planning work

• Pinal Central to Tortolita environmental work underway and application for a CEC will be submitted last quarter of 2008 Study group for project is being formed

• All EHV options are being studied in comprehensive TEP 20 year study

500 kV345 kV

Voltage

North Loop

Vail

Irvington

Tortolita

Saguaro

138 kV System138 kV System• 138kV • 34 projects identified in plan

• 15 in ten year window• 15 projects = 120 miles of

line• Ten year projects in WECC

base cases, part of SATS, SWAT, WestConnect planning work as well as comprehensive TEP 20 year study that is in progress

UNS Electric (Citizens)• Plan to construct a 230kV line from

Kingman to Mercator mine in 2009• Plan to upgrade the existing 115kV line to

Nogales to 138kV and connect to TEP Vail substation by 2012