ISO-NE Load Forecast Methodology April 2003 Forecast of Energy and Seasonal Peaks For NEPOOL, States, and RTEP03 Sub-areas Presentation to NESCAUM David J. Ehrlich Principal Analyst Load Forecasting, System Planning December 18, 2003

RTEP03 Peak Load and Installed Capacity MW by Sub-Area – 2003 (Peak Loads – 50/50 F/C) NB-NE - 700 Highgate - 210 HQ Phase II - 1500 NB VT Load 1203 839 MW Orrington South – 1050 Surowiec South - 1150 ME-NH – 1400 S-ME ME BHE Load 956 956 MW Load 533 1516 MW NH Load 312 942 MW Load 1617 4006 MW Boston – 3600 East-West – 2400 BOSTON North-South – 2700 Load 5222 3613 MW NY-NE – 1550 w/o Cross Sound Cable W-MA CMA/NEMA Load 1963 3681 MW Load 1634 206 MW NY SEMA/RI – 3000 SEMA CT RI Load 2550 3356 MW CSC -300 Load 2266 5140 MW Load 3350 4437 MW South West CT – 2000 SEMA – 2300 KEY: NOR Connecticut Import– 2200 RTEP Load Capacity SWCT Regional Transmission Expansion Plan Sub-area Load 1251 444 MW Load 2263 2036 MW Under Construction Priority Studies Required Norwalk-Stamford – 1100 Other Studies Required