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Update on the 2006 Transmission Study

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  1. Update on the 2006 Transmission Study LPSC B&E Meeting Baton Rouge, LA November 29, 2006

  2. Current Status of the Amite South Area • At the time of the Phase II Study, peak load in the Amite South area was 6,200 MW, and the Amite South import limit was 2,100 MW – resulting in a difference of 4,100 MW between load and import capability. • Since Hurricane Katrina, peak load in the Amite South area has dropped to 5,670 MW. Meanwhile, the Amite South import limit has been increased to 2,600 MW – resulting in a difference of 3,070 MW between load and import capability. • Reliance upon generation within Amite South on peak has dropped by more than 1,000 MW since the Phase II Study. • One purpose of the 2006 Transmission Study is to determine whether and when additional projects should be implemented to improve the Amite South import limit at a projected cost of $32 million for Phase II and $16 million for Phase III.

  3. Amite South Load and Import Data Load Loss Due to Georgia Gulf Cogen Load Loss Due to Hurricane Katrina 6,170 MW 5,800 MW 5,670 MW Load Loss Due to Occidental Cogen ASI Phase 1 Conway-Panama 230 kV Line Constructed Coly-Vignes-Sorrento 230 kV Line Constructed 2,600 MW Expected ASI Capability of 2,950 MW upon completion of ASI Phases 2 & 3 2,100 MW 1,800 MW * 1994-1999: Deduced * 2000-2005: Actual * 2006-2011: Projected

  4. Events/Factors AffectingAmite South Import Capability

  5. Amite South Import Improvement Plan Phase 1: Build 230 kV Line (Conway-Panama) Completed in 2005 Phase 2: Build 230 kV line (Panama-Dutch Bayou) Phase 3: Upgrade 230 kV Lines (Coly-Vignes-Sorrento & Conway-Bagatelle) 1 3 COLY MISSISSIPPI FRENCH SETTLEMENT WEBRE WILLOW GLEN RIVER 2 GONZALES 1 PLAQUEMINE VIGNES SORRENTO EVERGREEN 3 2 3 CONWAY SORRENTO DONALDSONVILLE LUTCHER BAGATELLE BAYOU VERRET BELLE POINT PANAMA WELCOME SUNSHINE CONVENT ROMEVILLE FRISCO DUTCH BAYOU ST. JAMES LITTLEGYPSY VACHERIE LEGEND 500 kV Line 230 kV Line 115 kV Line WATERFORD New or Upgraded Line

  6. OASIS Postings • Beginning on June 9, 2006, the transmission organization commenced posting on OASIS the data and information that is needed by the System Planning Organization for the PROMOD analyses to be conducted as part of the 2006 Transmission Study. • This transmission information is being used to develop a PROMOD base case for the study, and to develop the necessary “change cases.” • Various study scenarios will be evaluated: • Four potential projects have been identified relating to the Amite South and DSG areas. These projects will be evaluated first. • Five potential projects also have been identified relating to the Western Region in Texas. • Two additional study scenarios have been identified recently by SPP. The projects proposed by SPP also will be posted and evaluated as part of the 2006 transmission Study. Entergy’s main OASIS site: http://oasis.e-terrasolutions.com/OASIS/EES