1. 2006 BTA 8/5/2015 070136SSC-1 ACC BTA Requirements SRP’s Ten Year Plan Presentation Chuck Russell Salt River Project June 6, 2006 Phoenix, Arizona Arizona Corporation Commission Fourth Biennial Transmission Assessment 2006 - 2015 Workshop

2. 2006 BTA 8/5/2015 070136SSC-2 ACC BTA Requirements SRP’s Ten Year Plan Presentation TODAY SALT RIVER PROJECT 500kV SYSTEM NEVADA WESTWING KYRENE SILVER KING CORONADO CHOLLA (APS) MEAD McCULLOUGH MARKETPLACE BROWNING HASSAYAMPA RUDD PALO VERDE JOJOBA NAVAJO GS MOENKOPI YAVAPAI

3. 2006 BTA 8/5/2015 070136SSC-3 ACC BTA Requirements SRP’s Ten Year Plan Presentation NEVADA PINA WEST SANTA ROSA 2008 SALT RIVER PROJECT 500kV SYSTEM WESTWING KYRENE SILVER KING CORONADO CHOLLA (APS) MEAD McCULLOUGH MARKETPLACE BROWNING HASSAYAMPA RUDD PALO VERDE JOJOBA NAVAJO GS MOENKOPI YAVAPAI NORTH GILA (APS)

4. 2006 BTA 8/5/2015 070136SSC-4 ACC BTA Requirements SRP’s Ten Year Plan Presentation NEVADA TS5 (APS) SECOND KNOLL (APS) 2009 SALT RIVER PROJECT 500kV SYSTEM WESTWING KYRENE SILVER KING CORONADO CHOLLA (APS) MEAD McCULLOUGH MARKETPLACE BROWNING HASSAYAMPA RUDD PALO VERDE PINAL WEST JOJOBA SANTA ROSA NAVAJO GS MOENKOPI YAVAPAI NORTH GILA (APS)

5. 2006 BTA 8/5/2015 070136SSC-5 ACC BTA Requirements SRP’s Ten Year Plan Presentation NEVADA RACEWAY (APS) PINNACLE PEAK 2010 SALT RIVER PROJECT 500kV SYSTEM WESTWING KYRENE SILVER KING CORONADO CHOLLA (APS) MEAD McCULLOUGH MARKETPLACE BROWNING HASSAYAMPA RUDD PALO VERDE PINAL WEST JOJOBA SANTA ROSA TS5 (APS) NAVAJO GS SECOND KNOLL (APS) MOENKOPI YAVAPAI NORTH GILA (APS)

6. 2006 BTA 8/5/2015 070136SSC-6 ACC BTA Requirements SRP’s Ten Year Plan Presentation WESTWING KYRENE SILVER KING CORONADO CHOLLA (APS) MEAD McCULLOUGH MARKETPLACE BROWNING HASSAYAMPA RUDD PALO VERDE PINAL WEST JOJOBA SAGUARO SANTA ROSA RACEWAY (APS) TS5 (APS) NAVAJO GS SECOND KNOLL (APS) MOENKOPI YAVAPAI PINNACLE PEAK NEVADA PINAL SOUTH 2011 SALT RIVER PROJECT 500kV SYSTEM NORTH GILA (APS)

7. 2006 BTA 8/5/2015 070136SSC-7 ACC BTA Requirements SRP’s Ten Year Plan Presentation NEVADA 2012 SALT RIVER PROJECT 500kV SYSTEM WESTWING KYRENE SILVER KING CORONADO CHOLLA (APS) MEAD McCULLOUGH MARKETPLACE BROWNING HASSAYAMPA RUDD PALO VERDE PINAL WEST JOJOBA SANTA ROSA RACEWAY (APS) TS5 (APS) NAVAJO GS SECOND KNOLL (APS) MOENKOPI YAVAPAI PINNACLE PEAK PINAL SOUTH NORTH GILA (APS)

8. 2006 BTA 8/5/2015 070136SSC-8 ACC BTA Requirements SRP’s Ten Year Plan Presentation NEVADA (TBD, place holder for CATS only, no current SRP plans) 2012 TO BE DETERMINED SALT RIVER PROJECT 500kV SYSTEM WESTWING KYRENE SILVER KING CORONADO CHOLLA (APS) MEAD McCULLOUGH MARKETPLACE BROWNING HASSAYAMPA RUDD PALO VERDE PINAL WEST JOJOBA SAGUARO SANTA ROSA RACEWAY (APS) TS5 (APS) NAVAJO GS SECOND KNOLL (APS) MOENKOPI YAVAPAI PINNACLE PEAK PINAL SOUTH NORTH GILA (APS) SOUTHEAST VALLEY RS20(PIERCE)

9. 2006 BTA 8/5/2015 070136SSC-9 ACC BTA Requirements SRP’s Ten Year Plan Presentation TO APS OCOTILLO TO APS PINNACLE PEAK TO W.A.P.A. PINNACLE PEAK W.A.P.A. W.A.P.A. W.A.P.A. TO SILVER KING EXISTING 230kV SUBSTATIONS GENERATING STATION TODAY SALT RIVER PROJECT 230kV SYSTEM BRANDOW WARD CORBELL SANTAN GOLDFIELD THUNDERSTONE ALEXANDER WESTWING KYRENE ANDERSON WHITE TANKS ORME SRP PINNACLE PEAK PAPAGO LIBERTY (W.A.P.A.) AGUA FRIA DEER VALLEY (APS) ROGERS KNOX SCHRADER RUDD BROWNING

10. 2006 BTA 8/5/2015 070136SSC-10 ACC BTA Requirements SRP’s Ten Year Plan Presentation BRANDOW WARD CORBELL SANTAN GOLDFIELD THUNDERSTONE ALEXANDER WESTWING KYRENE ANDERSON WHITE TANKS ORME SRP PINNACLE PEAK PAPAGO LIBERTY (W.A.P.A.) AGUA FRIA DEER VALLEY (APS) ROGERS KNOX SCHRADER RUDD BROWNING TO APS OCOTILLO TO APS PINNACLE PEAK TO W.A.P.A. PINNACLE PEAK W.A.P.A. W.A.P.A. W.A.P.A. TO SILVER KING Dinosau r (RS19) LOOP IN EXISTING 230kV SUBSTATIONS GENERATING STATION 2007 SALT RIVER PROJECT 230kV SYSTEM

11. 2006 BTA 8/5/2015 070136SSC-11 ACC BTA Requirements SRP’s Ten Year Plan Presentation TO APS OCOTILLO TO APS PINNACLE PEAK TO W.A.P.A. PINNACLE PEAK W.A.P.A. W.A.P.A. W.A.P.A. TO SILVER KING TBD FOUNTAINHILLS EXISTING 230kV SUBSTATIONS GENERATING STATION 2014 SALT RIVER PROJECT 230kV SYSTEM BRANDOW WARD CORBELL SANTAN GOLDFIELD THUNDERSTONE ALEXANDER WESTWING KYRENE ANDERSON WHITE TANKS ORME SRP PINNACLE PEAK PAPAGO LIBERTY (W.A.P.A.) AGUA FRIA DEER VALLEY (APS) ROGERS KNOX SCHRADER RUDD BROWNING Dinosau r (RS19)

12. 2006 BTA 8/5/2015 070136SSC-12 ACC BTA Requirements SRP’s Ten Year Plan Presentation TO APS OCOTILLO TO APS PINNACLE PEAK TO W.A.P.A. PINNACLE PEAK W.A.P.A. W.A.P.A. W.A.P.A. TBD TO SILVER KING RS17 RS21 SOUTHEAST VALLEY/RS22 RS23 RS20(PIERCE) LOOP IN EXISTING 230kV SUBSTATIONS GENERATING STATION TO BE DETERMINED SALT RIVER PROJECT 230kV SYSTEM BRANDOW WARD CORBELL GOLDFIELD THUNDERSTONE ALEXANDER WESTWING KYRENE ANDERSON WHITE TANKS ORME SRP PINNACLE PEAK PAPAGO LIBERTY (W.A.P.A.) AGUA FRIA DEER VALLEY (APS) ROGERS KNOX SCHRADER RUDD BROWNING FOUNTAINHILLS Dinosau r (RS19) SANTAN

13. 2006 BTA 8/5/2015 070136SSC-13 ACC BTA Requirements SRP’s Ten Year Plan Presentation SOUTHEAST VALLEY TBD DESERT BASIN PINAL WEST PINAL SOUTH TBD SAGUARO SANTA ROSA (TBD, place holder for CATS-HV only, no current SRP plans) EXISTING 230kV SUBSTATIONS GENERATING STATION 2011 PINAL COUNTY 230kV SYSTEM

14. 2006 BTA 8/5/2015 070136SSC-14 ACC BTA Requirements SRP’s Ten Year Plan Presentation SOUTHEAST VALLEY TBD DESERTBASIN PINALWEST PINALSOUTH SAGUARO SANTAROSA (TBD, place holder for CATS-HV only, no current SRP plans) EXISTING 230kV SUBSTATIONS GENERATING STATION TO BE DETERMINED PINAL COUNTY 230kV SYSTEM

15. 2006 BTA 8/5/2015 070136SSC-15 ACC BTA Requirements SRP’s Ten Year Plan Presentation 115kV 230kV TO APACHE (AEPCO) TO THUNDERSTONE TO SILVER KING 500kV 230 SEE DETAIL DETAIL SUPERIOR 230KV SUPERIOR 115KV EXISTING 230kV SUBSTATIONS GENERATING STATION TODAY SALT RIVER PROJECT EASTERN MINING AREA SYSTEM MIAMI PINAL SUPERIOR SPURLOCK MOONSHINE ELLISON FRAZIER ROOSEVELT RAY MORRIS KEARNY HAYDEN STEWART MOUNTAIN MORMON FLAT HORSE MESA GOLDFIELD OAK FLAT PINTO VALLEY KNOLL COOLIDGE (W.A.P.A.) SILVER KING ASARC0 BONNEYBROOK(APS)

16. 2006 BTA 8/5/2015 070136SSC-16 ACC BTA Requirements SRP’s Ten Year Plan Presentation 115kV 230kV TO APACHE (AEPCO) TO THUNDERSTONE TO SILVER KING 500kV 230 TBD SEE DETAIL CARREL DETAIL SUPERIOR 230KV SUPERIOR 115KV EXISTING 230kV SUBSTATIONS GENERATING STATION 2006 SALT RIVER PROJECT EASTERN MINING AREA SYSTEM MIAMI PINAL SUPERIOR SPURLOCK MOONSHINE ELLISON FRAZIER ROOSEVELT RAY MORRIS KEARNY HAYDEN STEWART MOUNTAIN MORMON FLAT HORSE MESA GOLDFIELD OAK FLAT PINTO VALLEY KNOLL COOLIDGE (W.A.P.A.) SILVER KING ASARC0 BONNEYBROOK(APS)

17. 2006 BTA 8/5/2015 070136SSC-17 ACC BTA Requirements SRP’s Ten Year Plan Presentation MIAMI PINAL SUPERIOR SPURLOCK MOONSHINE ELLISON FRAZIERROOSEVELTRAY MORRIS KEARNY NEW HAYDEN HAYDEN STEWART MOUNTAIN MORMON FLAT HORSE MESA GOLDFIELD OAK FLAT PINTO VALLEY KNOLL COOLIDGE (W.A.P.A.) SILVER KING ASARC0 CARREL BONNEYBROOK(APS) 115kV 230kV TO APACHE (AEPCO) TO THUNDERSTONE TO SILVER KING 500kV 230 (230kV) EXISTING LINE FUTURE LINE SEE DETAIL 230kV RS20(PIERCE) (230kV)(230kV)(230kV) (230kV) DETAIL SUPERIOR 230KV SUPERIOR 115KV EXISTING 230kV SUBSTATIONS GENERATING STATION TODAY SALT RIVER PROJECT EASTERN MINING AREA SYSTEM

18. 2006 BTA 8/5/2015 070136SSC-18 ACC BTA Requirements SRP’s Ten Year Plan Presentation SRP Changes from 2004 to 2006 500kV Projects 2008 Palo Verde – Pinal West Delayed from 2006 2008 Pinal West – Santa Rosa Delayed from 2007 2009 Palo Verde – TS5 Delayed from 2007 2009 Second Knoll (APS) 2010 Raceway – Pinnacle Peak New project 2011 Santa Rosa – Browning No change 2011 Pinal SouthAdditional facility to SEV Project 2012 TS5 – Raceway Delayed from 2010 500kV Projects 2008 Palo Verde – Pinal West Delayed from 2006 2008 Pinal West – Santa Rosa Delayed from 2007 2009 Palo Verde – TS5 Delayed from 2007 2009 Second Knoll (APS) 2010 Raceway – Pinnacle Peak New project 2011 Santa Rosa – Browning No change 2011 Pinal SouthAdditional facility to SEV Project 2012 TS5 – Raceway Delayed from 2010 230kV Projects 2007 Dinosaur (RS19) Advanced from 2008 2011 Desert Basin – Pinal South New project 2011 Desert Basin – Santa Rosa New project 2014 Fountain Hills Delayed from 2012 230kV Projects 2007 Dinosaur (RS19) Advanced from 2008 2011 Desert Basin – Pinal South New project 2011 Desert Basin – Santa Rosa New project 2014 Fountain Hills Delayed from 2012 115kV Projects No changes 115kV Projects No changes