INDUSTRY-WIDE ACRONYMS

ACC Corporation Commission ADEQ Arizona Department of Environmental Quality AEPCO Arizona Electric Power Cooperative, Inc. ANZA Anza Electric Cooperative, Inc. APA Arizona Power Authority APPA American Public Power Association APS Company ASLD Arizona State Land Department AVIDD Avra Valley Irrigation Drainage District ADWR Arizona Department of Water Resources AzISA Arizona Independent Scheduling Administrators Association BLM Bureau of Land Management CAISO California Independent System Operator CAP Central Arizona Project CAWCD Central Arizona Water Conservation District CCPG Colorado Coordinated Planning Group CEC California Energy Commission CPUC California Public Utility Commission CREDA Colorado River Energy Distributor’s Association CREPC Committee on Regional Electric Power Cooperation CRSP Colorado River Storage Project CSPG California Sub-regional Planning Group CWP Construction Work Plan DOE U.S. Department of Energy DHS Department of Homeland Security DNR Department of Natural Resources DVEC Duncan Valley Electric Cooperative, Inc. ED1 Electric District #1 ED2 Electric District #2 ED3 Electric District #3 ED4 Electric District #4 ED5 Electric District #5 EEI Edison Electric Institute EIS Environmental Impact Statement EPA Environmental Protection Agency EPE El Paso Electric Company EPG Environmental Planning Group EPRI Electric Power Research Institute ER Environmental Report FERC Federal Energy Regulatory Commission FONSI Finding of No Significant Impact Statement GCEC Graham County Electric Cooperative, Inc. GCSECA Grand Canyon State Electric Cooperative Association, Inc.

6/4/2008 SWTC & TEP 2nd Quarter 1 Stakeholder Meeting GIS Geographic Information System GPS Global Positioning System GRICUA Gila River Indian Community Utility Authority IEDA Irrigation and Electrical Districts Association IEEE Institute of Electrical and Electronics Engineers, Inc. IID Imperial Irrigation District IOU Investor-owned Utility IPP Independent Power Producer IRP Integrated Resource Plan ISO Independent System Operator KRSA K. R. Saline & Associates kV Kilovolts kW Kilowatts kWH Kilowatt-hour LADWP Los Angeles Department of Water & Power MEC Mohave Electric Cooperative, Inc. MUNI Municipal-owned System MW Megawatts MWD Metropolitan Water District MW&E Morenci Water & Electric MWH Megawatt-hour NARUC National Association of Regulatory Utility Commissioners NEC Navopache Electric Cooperative, Inc. NERC North American Reliability Corporation NMPRC New Mexico Public Regulation Commission NM RETA New Mexico Renewable Energy Transmission Authority NPC Nevada Power Company NRECA National Rural Electric Cooperative Association NREL National Renewable Energy Laboratory NTAC Northwest Transmission Assessment Committee NTTG Northern Tier Transmission Group NTUA Navajo Tribal Utility Authority NWPP Northwest Power Pool OASIS Open Access Same-Time Information System OATI Open Access Technology International OATT Open Access Transmission Tariff OSHA Occupational Safety and Health Administration PG&E Pacific Gas & Electric PCC Planning Coordination Committee (of WECC) PD Parker Davis System (either the dams or transmission system) PMA Power Marketing Agency PNM Public Service Company of New Mexico PRPA Platte River Power Authority PUC Public Utility Commission PSCO Public Service Company of Colorado RDRC Rocky Mountain Desert Southwest Reliability Center

6/4/2008 SWTC & TEP 2nd Quarter 2 Stakeholder Meeting REC Rural Electric Cooperative RETI Renewable Energy Transmission Initiative (California) RMEL Rocky Mountain Electric League RTO Regional Transmission Association RUS Rural Utilities Service SCE Southern California Edison SCIP San Carlos Irrigation Project SDG&E San Diego Gas & Electric Company SIDD Silverbell Irrigation Drainage District SMUD Sacramento Municipal Utility District SPG Sub-regional Planning Group SPPG Sierra Pacific Planning Group SPPR Southwest Public Power Resources Group SPR Sierra Pacific Resources SRP SRSG Southwest Reserve Sharing Group SSVEC Sulphur Springs Valley Electric Cooperative, Inc. STPG Sub-regional Transmission Planning Group SWAT Southwest Area Transmission Planning Group SWTC Southwest Transmission Cooperative, Inc. SWPG Southwestern Power Group II, LLC TANC Transmission Agency of Northern California TEP Tucson Electric Power Company TEPPC Transmission Expansion Planning Policy Committee (of WECC) TP Transmission Provider TRICO Trico Electric Cooperative, Inc. TSGT Tri-State Generation & Transmission Association UES Unisource Energy Services USBR United States Bureau of Reclamation WECC Western Electricity Coordinating Council WESTERN Western Area Power Administration WIEB Western Interstate Energy Board WC WestConnect WGA Western Governor’s Association WSES Western States Energy Solutions

SWAT SUB-GROUP ACRONYMS

AZNM Arizona-New Mexico Regional Transmission CATS-EHV Central Arizona Transmission Study – Extra High Voltage CATS-HV Central Arizona Transmission Study – High Voltage CRT Colorado River Transmission NM New Mexico Transmission Renewable Transmission Task Force (no acronym yet) SATS Southeast Arizona Transmission Study SCWG Short-circuit Working Group

6/4/2008 SWTC & TEP 2nd Quarter 3 Stakeholder Meeting