GDS Associates, Inc. ERCOT Reliability Operations Subcommittee June 10, 2010 Tex-La Electric Cooperative of Texas Load Forecast Methodologies

GDS Associates, Inc. Tex-La Service Territory ERCOT SPP Tex-La SERC (Entergy Sub-Region) 2 Tex-La Electric Cooperative of Texas

GDS Associates, Inc. Forecast Summary  Winter peak to increase by 31 MW from  Summer peak to increase by 28 MW from  Energy to increase by 182 GWH  1 industrial account will account for 22 MW and 135 GWH of total growth  Net of new industrial customer, energy to increase at 1.4% per year and peak to increase at 1.1% per year 3 Tex-La Electric Cooperative of Texas

GDS Associates, Inc. Load Forecast Methodologies  Bottom-Up, Top-Down  Customer class  Distribution cooperative  Tex-La  Region  Point of delivery  Hybrid End-Use and Econometric Model  Econometrics  Judgment  Historical proportions 4 Tex-La Electric Cooperative of Texas

GDS Associates, Inc ALDR Filing 5 Tex-La Electric Cooperative of Texas