Presentation Overview

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Presentation Overview

• APS Challenges
• Southwest Transmission System
• Western Regional and Sub-Regional Transmission
  Planning
• Arizona Planned Facilities
• Proposed Regional EHV Projects
• TransWest Express Project
• Arizona Transmission Plan for Renewables

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Arizona Public Service Company

• Largest electric utility in Arizona
• Fastest growing utility in the country
• Peak Control Area load 7750 MW (07/21/06)
• Serves over 1.1 million customers
• Over 1B Ten-Year Transmission Plan

LEGEND
EXISTING 500 KV LINES
EXISTING 345 KV LINES
EXISTING 230 KV LINES
POWER PLANT
EXISTING 115 KV LINES
115KV ABOVE SUBSTATION
NUCLEAR POWER PLANT
JOINT OWNSHIP
J/O
Substation locations and line routings depict an
electrical connection only and do not reflect any
assumed physical locations or routing.
NORTH
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APS Challenges With Growth

• APS as well as other utilities in Arizona,
  Southwest and Southern California are fastest
  growing in nation
• APS summer resource capacity requirement expected
  to increase 8000MW by 2025
• APS annual energy sales expected to increase by
  70 by 2025
• APS RPS require 15 of retail energy sales from
  renewable resources by 2025
• 30 of this requirement from distributed
  renewable resources such as rooftop solar

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2005 Southwest Transmission System(From 500,000
Feet)
230K
V
345K
V
TO INTER
MOUNTAI
N
TO SIGURD
230K
V
345KV
TO
TO HUNGING
TON
TO C
UREC
ANTI
LONGFELLOW
(UPL)
(UPL)
SH
I
P
RO
C
K
345
SAN JU
AN
KV
GLEN CANYON
230
KV
NAVA
JO
500
KV
230
TO
KV
KV
KV
345
KV
FOUR
500
345
CORNERS
ELDORADO
KV
500
345
NEVADA
KV
500
KV
CALIFORNIA
NORTON
MEAD
MOENKOPI
KV
345
KV
SELIGMAN
500
B-A
TO
ROUND
DC
BLACKWATER
VALLEY
KV
AC-DC TIE
KV
COCONINO
KV
345
_500
500
MOHAVE

WEST
230KV
MESA
230KV
CHOLLA
YAVAPAI
345
KV
KV
500
KV
WILLOW
CORONADO
345
LAKE
KV
KV
500
345
500
KV
345
KV
PREA
CHER
CANYON
SPRING
ERVILL
E
KV
500
VICTOR
VILLE
ADEL
ANT
O
PINNAC
LE
CALIFORNIA
3-50
0KV
ARIZONA
PE
AK
WE
S
T
WI
N
G
TO M
IDW
AY
KV
500
PALO VERDE/
PHOEN
IX
HASSAYAMPA
KV
LIBE
RTY
345
500
KV
KYRE
NE
RUDD
LUGO
JOJOBA
VINC
ENT
SILVER
KING
230 KV
TO
500
KV
SWTC
KV
KV
TO
DEV
ERS
REDHAW
K
230
SAGUA
RO
500
ARTESIA
GILA
AC-DC TIE
RIVER
TOR
TOL
ITA
GREEN
LEE
GILA
4-23
KV
500
0KV
BEND
NORTH
345
IMPERIAL
GILA
KV
MIGUEL
VALL
EY
TUCSO
N
500
KV
YUMA
500
KV
VAIL
SOUT
H
345
KV
KV
345
ARIZONA
BICKNE
LL
MEXI
CO
POWER
PLAN
T
SUB
STA
TI
ON
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Planning the Transmission of the Future
WECC Transmission Expansion Planning Policy
Committee (TEPPC)
Subregional Groups
ISO/RTO
Individual Transmission Owners
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Western Interconnection Sub-Regional Planning
Groups
NTAC
NorthwestTransmissionAssessmentCommittee
Columbia Grid
NTTG
Northern Tier Transmission Group
WECC Western Electricity Coordinating Council
CCPG
CSPG
ColoradoCoordinatedPlanningGroup
CaliforniaSub-Regional P lanaing Group
SWAT
SouthwestAreaTransmission
STEP
SouthwestTransmissionExpansionPlanning
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Arizona Planned EHV Facilities
NAVAJO
FOUR
RED MESA EAST
2010
CORNERS

• Planned EHV Projects
• PV-TS5-TS9-PP 500kV
• Southeast Valley
• Pinal South-Tortolita 500kV
• Palo Verde-North Gila 500kV
• Navajo Transmission Project

500KV J/O
500KV
MOENKOPI
TO CALIF.
345KV
To GLEN
TO MEAD /
500KV J/O
CANYON
(WAPA)
MARKETPLACE
SELIGMAN
COCONINO
ROUND
2 circuits
230KV
YAVAPAI
VERDE
VALLEY
FLAGSTAFF
CHOLLA
BAGDAD
(WAPA)
FLAGSTAFF
WILLOW
LAKE
(APS)
(SRP)
2009
SECOND
(WAPA)
(WAPA)
KNOLL
2009
CORONADO
PREACHER
GAVILAN
TS9
CANYON
PEAK
2010
2012
2010
MAZATZAL
2009
TS5
TBD
WEST
2009
WING


PINNACLE
500KV J/O
PEAK
PALO VERDE-
LIBERTY
HASSAYAMPA
RUDD
KYRENE
BROWNING
JOJOBA
2011
KNOX
PINAL
DESERT
500KV
REDHAWK
2008
WEST
J/O
BASIN
2011
GILA RIVER
2012
N.GILA
CASA GRANDE
J/O
2011
GILA BEND
PINAL SOUTH
SANTA
ROSA
SAGUARO
ORACLE
TAT MOMOLI
YUCCA
SAN MANUEL
2011
JUNCTION
TORTOLITA
ADAMS
MURAL
NORTH
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Regional EHV Projects
Peace
Peace
River
River

• Path 49 upgrades
• TransWest Express
• Northern Lights
• Frontier Line
• Zia/High Plains
• PAC Gateway

British
British
Alberta
Alberta
Columbia
Columbia
H
Canada
Canada
Seattle
Seattle
WA
WA
Portland
Portland
MT
MT
Celilo
Celilo
Colstrip
Colstrip
Pacific
OR
OR
Pacific
Ocean
ID
ID
Ocean
Malin
Malin
Dave Johnson
SD
SD
WY
WY
Midpoint
Midpoint
Borah
Borah
Round
Round
Jim
Mountain
Mountain
Laramie
Laramie
Bridger
Jim
Salt
Salt
Bridger
River
River
Lake
NV
NV
Lake
NE
NE
Reno
City
Reno
City
San Francisco
San Francisco
Denver
UT
UT
Denver
Market
CO
CO
Market
Four
Four
Place
Place
CA
CA
Corners
Corners
Los
Los
Palo
Palo
Angeles
Angeles
NM
NM
Verde
Verde
Albuquerque
Albuquerque
Phoenix
Phoenix
San Diego
AZ
AZ
Tucson
Tucson
Mexico
Mexico
El Paso
El Paso
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TransWest Express Project Summary
Two new AC or one new DC transmission line(s)
from Wyoming through Utah, Colorado, and/or
Nevada to Arizona capable of 3000MW

• Project complements other planned projects
• Navajo Transmission Project 500kV line
• Palo Verde-Devers 2 500kV line
• EOR 9300 Project
• Palo Verde-North Gila 2 500kV line
• Provides access to coal and wind resources in
  Wyoming

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Arizona Transmission Plan for Renewables

• Requirement from 2006 Arizona Corporation
  Commission Biennial Transmission Assessment
• Analyze ATC for Renewables and prepare a plan for
  renewable transmission
• Plan development process
• Assess location of renewable resources
• Determine existing ATC
• Develop transmission plan
• SWAT Renewable Transmission Task Force
• Southwest-wide effort
• Begin with Arizona

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AZ Renewable Resource Assessment Combined
Resource Areas
Resource Areas
Announced Development
BV Identified Potential - 5,468 MW (6,300MW)
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Creative Transmission Solutions