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

0

1,000

2,000

3,000

4,000

5,000

6,000

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

Year

MW

ASI Capability

AS Area Peak Load *

Coly-Vignes-Sorrento 230 kV Line Constructed

ASI Phase 1Conway-Panama

230 kV Line Constructed

Expected ASI Capability of 2,950

MW upon completion of ASI Phases 2 & 3

Load Loss Due to

Hurricane Katrina

Load Loss Due to

Georgia Gulf Cogen

Load Loss Due to Occidental Cogen

* 1994-1999: Deduced* 2000-2005: Actual* 2006-2011: Projected

1,800 MW2,100 MW

2,600 MW

Amite South Load and Import Data

5,800 MW

6,170 MW

5,670 MW

4

Events/Factors AffectingAmite South Import Capability

Event Effect on ASI Capability• 1997 – Construction of the Coly-Vignes-Sorrento 230 kV line and the

installation of approximately 300 MW of cogeneration by Georgia Gulf; together with load growth and other generation additions at the Exxon facility in Baton Rouge Cost - $9.1 Million

• Increased ASI capability to 2,100 MW

• 2001 – Upgraded Willow Glen-Gonzales 138 kV line

Cost - $4.5 Million

• Dispensed with need for an operating guide and maintained ASI capability

• 2001 – Installed 230/115 kV 200 MVA autotransformer at Sorrento

Cost - $4.5 Million

• Improved reliability to 138/115 kV transmission corridor and maintained ASI capability at 2,100 MW

• 2005 – Constructed Conway-Panama 230 kV line, and installed dynamic line rating equipment on Panama-Romeville 230 kV line

Cost - $19.8 Million

• Increased ASI capability to 2,600 MW

• Future – Plans to construct Phases 2 & 3 of the ASI Improvement Plan: Phase 2 – new Panama-Dutch Bayou 230 kV line; Phase 3 – upgrades of Coly-Vignes-Sorrento & Conway-Bagatelle 230 kV lines. Need for and timing of improvements to be determined by the ongoing 2006 Transmission Study. Projected cost - $48 Million

• Phase 2 expected to increase the ASI capability to 2,835 MW; Phase 3 expectation is to 2,950 MW

5

MISSISSIPPI

EVERGREEN

DONALDSONVILLE

WELCOME

BAYOUVERRET

ST. JAMES

VACHERIE

FRISCO

CONVENTSUNSHINE

ROMEVILLE

BAGATELLE

CONWAY

GONZALES

FRENCHSETTLEMENT

SORRENTO

SORRENTO

RIVER

DUTCHBAYOU

VIGNESPLAQUEMINE

WEBRE

LUTCHER

LITTLEGYPSY

COLY

WILLOW GLEN

BELLE POINT

PANAMA

LEGEND

230 kV Line

115 kV Line

500 kV Line

New or Upgraded Line

Amite South Import Improvement Plan

1

2

3

3

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

2

3

WATERFORD

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