APA Customer Bubble Charts Work in Progress Updated January 25, 2016 (a.m.) (Contact: John Underhill ) 1

Salt River Project Scheduling Entity Balancing Authority 64,248kw Total 59,234kw A 4,014kw D1 1,000kw D2 Town of Gilbert 1,000kw D2 San Tan ID 520kw A City of Chandler 676kw D1 Fort McDowell 338kw D1 SRPMIC 3,000kw D1 SRP 38,782kw A Customer Point of Delivery Queen Creek ID 1,770kw A Chandler Heights 930kw A ED6 Pinal 8,358kw A Ocotillo WCD 2,115kw A Roosevelt WCD 6,759kw A Mead 230kV Hoover Dam Post-2017 WAPA Dynamic Signal 0 to 64MW Point of Delivery Transmission Reservation ED6 has loads in both APS and SRP BA, the majority is within the SRP BA

AEPCO/CAWCD Sub-metered under WAPA Scheduling Entity 214,189kw Total 161,600kw CAWCD 37,236kw A 3,161kw B 7,188kw D1 5,004kw D2 Graham County Elec 312kw D1 1000kw D2 Sulfur Springs VEC 2731kw D1 1000kw D2 Mohave Electric Co. 1145kw D1 1000kw D2 TRICO Elec Coop 3000kw D1 1000kw D2 Avra Water Co-op 100kw D2 Duncan Valley Elect 700kw D2 City of Safford 2101kw B City of Sierra Vista 204kw D2 Town of Thatcher 1060kw B Mead 230kV Hoover Dam CAWCD 161,600kw B Avra I&DD 630kw A St David ID Sulfur Spr 81kw A Silverbell I&DD 710kw A Franklin Irr District Duncan Vly 303kw A Gila Vly ID Graham Cy 910kw A Mohave Valley I&DD 390kw A Post-2017 Customer Point of Delivery WAPA Dynamic Signal 0 to 214MW Point of Delivery Transmission Reservation ED4 Pinal 19445kw A ED-5 Pinal 14767kw A

Arizona Public Service Balancing Authority 98,932kw Total 65,405kw A 22,552kw B 7,204kw D1 3,771kw D2 Hyder Valley Irrig District 100kw A Maricopa Co. Mun. WCD 8838kw A Roosevelt ID 3219kw A McMullen Valley 3800kw A 5342kw B Tonopah Irrigation District 1549kw A Aguila Irrig District 2449kw A 3878kw B Customer Point of Delivery Harquahala Valley Power 2490kw A Buckeye Water Cons District 2979kw A ED7 Maricopa 10498kw A ED-8 Maricopa 13,387kw A 10917kw B Markham Irrig and WCD 100kw A Mead 230kV Hoover Dam Silvercreek Irrig Dist 100kw A City of Avondale 547kw D2 City of Buckeye 670kw D2 City of Flagstaff 172kw D2 City of Glendale 426kw D1 City of Globe 115kw D1 113kw D2 Town of Payson 119kw D1 173kw D2 City of Peoria 691kw D1 City of Phoenix 3000kw D1 City of Sedona 111kw D2 City of Scottsdale 2366kw D1 City of Tempe 241kw D1 Town of Wickenburg 2313kw B City of Williams 825kw D2 Northern AZ IDPP 246kw D1 Post-2017 ED-3 Pinal (ED-1) 15896kw A Point of Delivery WAPA Dynamic Signal 0 to 99MW Transmission Reservation RID has loads in both the APS BA and SRP BA. The majority of the loads are within the APS BA Ak-Chin Indian Comm 102kw B City of Yuma 996kw D2 City of Maricopa 164kw D2

Tucson Electric Power Balancing Authority 9,169kw Total 6,439kw A 1,427kw D1 1303kw D2 Cortaro Marana ID 6439kw A Customer Point of Delivery Town of Oro Valley 203kw D2 City of Tucson Water Dep. 1248kw D1 Metro Domestic Water ID 179kw D1 Mead 230kV Hoover Dam Post-2017 WAPA Dynamic Signal 0 to 9MW Point of Delivery Transmission Reservation Grover’s Hill ID 100kw D2 Navopache 1000kw D2

Western Area Power Administration Balancing Authority 35,636kw Total 22,455kw A 2,547kw B 10,102kw D1 532kw D2 Hohokam Irrigation & Drainage 100kw A Town of Fredonia 201kW D1 100kw D2 City of Mesa 1497kw B ED kw A Customer Point of Delivery Wellton Mohawk 2910kw A Page Utility 1050kw B Mead 230kV Hoover Dam Kaibab Band of Paiute 124kw D1 Hualapai Indian Tri 381kw D1 100kw D2 Gila River Indian Com 3,000kw D1 Aha Macav Indian Comm 332kw D2 Tohono O’odham 2,709kw D1 Pascua Yaqui Tribe 437kw D1 Navajo Tribal Util. 3000kw D1 Tonto Apache Tribe 250kw D1 Post-2017 Point of Delivery WAPA Dynamic Signal 0 to 36MW Transmission Reservation