ColorColor CommentaryCommentary forfor WestConnectWestConnect Paths Paths

U.S. DOE 2009 Congestion Study Spring 2009 Technical Workshop

Bob Smith Director Asset Management and Planning Public Service Company March 25, 2009 03/25/09 2

Four Corners West (Path 22) Owner: APS (SCE has all rights on FC-MK 500kV line through long term lease) TTC= 2325 MW Primary Use: Delivery of Four Corners generation and resources and New Mexico wind generation

Four Corners Generation APS - 792.5 MW SCE - 744 MW PNM - 201.5 MW SRP - 155 MW EPE - 108.5 MW TEP - 108.5 MW TOTAL = 2110 MW 03/25/09 3

TOT 2A Owners: WAPA, PSCO, Tri-State TTC= 690 MW Primary Use: Delivery of CRSP hydro, Springerville generation and merchant activity 03/25/09 4

Southern New Mexico (Path 47) Owners: EPE, PNM, TRI TTC= 940 MW Primary Use: Import Palo Verde Nuclear and Four Corners power into southern New Mexico 03/25/09 5

Navajo-Crystal-McCullogh 500kV Owners: NPC, LADWP, USBR TTC = 1422MW East of the River (Path 49) TTC= 8055 MW

Moenkopi-El Dorado 500kV Owners: APS (SCE has all rights on MK-ED Liberty-Peacock-Mead 345kV 500kV line through long term lease) Owners: WAPA TTC = 1555MW TTC = 450MW

Perkins-Mead 500kV Owners: APS, SRP, WAPA, LADWP, Other CA Entities Palo Verde-Devers 500kV TTC = 1300MW Owners: SCE TTC = 1802MW

Hassayampa-North Gila 500kV Owners: SDG&E, APS, IID TTC = 1526MW 03/25/09 6

West of the River (Path 46) TTC= 10,623 MW

•El Dorado-Lugo 500kV •El Dorado-Lugo 230kV 1&2 •Mohave-Lugo 500kV •Julian Hinds-Mirage 230kV •McCullough-Victorville 500kV 1&2 •Hoover-Victorville 287kV •Marketplace-Adelanto 500kV •North Gila- 500kV •Palo Verde-Devers 500kV •El Centro-Imperial Valley 230kV •Ramon-Mirage 230kV •Coachella-Devers 230kV

West of the River Owners: •SCE, LADWP, SDG&E, IID, Other CA cities 03/25/09 7 03/25/09 8 Phoenix and Tucson Planned EHV

Facilities NAVAJO

RED MESA EAST FOUR CORNERS

Planned EHV Projects 500KV J/O 500KV MOENKOPI TO CALIF. 345KV

ƒ TO MEAD / To GLEN PV-TS5-TS9-PP 500kV 500KV J/O CANYON (WAPA) MARKETPLACE SELIGMAN

ƒ Southeast Valley COCONINO ROUND 2 circuits YAVAPAI 230KV VALLEY VERDE FLAGSTAFF ƒ BAGDAD (WAPA) CHOLLA Pinal Central-Tortolita WILLOW ( LAKE SR P)

(WAPA) )

A

P 500kV A W

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CORONADO PREACHER TS9 GAVILAN CANYON PEAK 2010 2 2016 010 MAZATZAL TS5 2014 WEST TBD 2014 WING V J/O PINNACLE 500K PALO VERDE- PEAK LIBERTY HASSAYAMPA RUDD KYRENE BROWNING JOJOBA KNOX 2011 PINAL DESERT 500KV REDHAWK WEST J/O 2013 BASIN GILA RIVER N.GILA CASA GRANDE 2 GILA BEND 01 PINAL SOUTH SANTA 3 ROSA

SAGUARO YUCCA TAT MOMOLI ORACLE 2013JUNCTION SAN MANUEL TORTOLITA

LEGEND ADAMS EXISTING 500 KV LINES PLANNED 500 KV LINES EXISTING 345 KV LINES FUTURE 115KV & ABOVE SUBSTATION EXISTING 230 KV LINES EXISTING 115 KV LINES POWER PLANT MURAL 115KV & ABOVE SUBSTATION NORTH J/O JOINT OWNSHIP PLANT Substation locations and line routings depict an electrical connection only and do not reflect any assumed physical locations or routing.