1. 1 Entergy Gulf States, Inc. (Louisiana) Proposed Transmission Reliability Projects Entergy Transmission Planning Summit New Orleans, LA July 10, 2003

2. 2 2004 EGSI-LA Transmission Reliability Projects 69kV Five Points-Erath Line Upgrade McManus Capacitor Bank Addition Harelson Substation: 230/69kV Auto Replacement Carryover – 4-30-2004 ISD Improve ASI REVISED : Build line Conway-Panama (2004 ISD) Carryover SEE ELI Presentation Willow Glen: Breaker Replacement Program 5 – 230 kV breakers Coly-Hammond: Build 230kV line 2006 ISD. Port Hudson-Crown Zellerbach Line upgrade Chlomal-Jennings Line 13 Upgrade Port Hudson 69 kV Breaker Replacement

3. 3 230kV Harelson Substation: Replace 2 nd 230/69kV 200MVA auto with a 300MVA unit Harelson 230/69kV substation, located in eastern Baton Rouge, has two 200MVA autotransformers. This substation, in conjunction with Coly substation, serves an area with one of the highest load growths in south Louisiana. Contingency: Under peak loading conditions, loss of one of the existing 230/69kV autotransformers at Harelson can potentially overload the other unit by 19%. Recommended Solution: Replace 2nd 200MVA auto with another 300MVA unit. The 1 st auto will have been in-service by 12-13-2003 (T#2). Substation space constraints prohibited the installation of a third auto. Total Estimated Cost: $4.2M2004 Cost: $700 K Estimated In-service Date: 4-30-2004 2004

4. 4 Harelson Weiner 230kV Harelson Substation

5. 5 EGSI-LA Circuit Breaker Replacement Program 2004 Mandatory: Safety Issue –Replace five 230 kV circuit breakers at Willow Glen Substation –Replace one 69kV circuit breaker at Port Hudson Total Estimated Program Cost: $7.3 M –2004 Cost: ~$2.8 M Estimated ISD: 7-30-2004

6. 6 138 kV Line 368 Port Hudson-Crown Zellerbach: 2004 The 138 kV substations in East Baton Rouge and East Feliciana Parishes are served by 2-230/138 kV autos located at Port Hudson substation. This industrial loop serves approximately 237 MVA. Contingency: Under peak loading conditions, loss of the Repapco-Port Hudson line can potentially overload Line 368 (Port Hudson-Crown Zellerbach) by as much as 36% in 2004, that portion of line composed of 795 AA and rated at 174 MVA. Recommended Solution: Reconductor 7.5 miles of Line 368 with a conductor capable of at least 301 MVA or 1260 A. Estimated Cost: $3.81M

7. 7 138kV Line 368 Port Hudson-Crown Zellerbach Line 368 2004

8. 8 Chlomal-Jennings Loop Upgrade The 69kV transmission system between Jennings and Chlomal substations will serve approximately 73MW of load including the radial from Lawtag substation in 2004. The main "trunk" of these systems are the contiguous segments comprising of Line 13 (Jennings-Compton-Elton), Line 16 (Elton-Tupper- Serpent-Carter), and Line 11 (Carter-Lacassine-Chlomal). The other main "trunk" is comprised of Line 14 (Jennings-Lawtag) and Line 12 (Lawtag-Welsh-Derouen-Iowa-Chlomal), which span approximately 29 miles and serve approximately 39 MW. These lines are over 50 years old. Their age have manifested in reduced reliability and reduced load-serving capacity. Between 1997 and 2001, an average of 19 outages per year occurred on the northern route (Lines 11,13, and 16). In 2002, 13 outages were recorded. Splices have been used to make repairs and they are beginning to fail. The current loading can potentially cause the 69kV lines to sag into the distribution underbuild that is located along most of these lines. Upgrading these lines is needed to avoid safety and reliability concerns. 2004

9. 9 Line 11/12/13/15/16 69 kV Upgrade

10. 10 Chlomal-Jennings Loop Upgrade (continued) For Existing Configuration: ContingencyOverload/Undervoltage Loss of Jennings-Compton Chlomal-Lacassine 13% Depressed local area voltages (0.78 p.u. at Compton) Loss of Jennings-Elton Chlomal-Lacassine loads to 99% Loss of Chlomal-Lacassine Jennings-Compton 30% Depressed local area voltages(0.75 p.u. at Lacassine) Elton-Tupper 5% Loss of Jennings-Lawtag Chlomal-Iowa 6% Depressed local area voltages (0.91 p.u. at Potter) Possible solution: Upgrade 46 miles of line Chlomal-Serpent and Jennings to Compton rated 33 MVA/ 39 MVA with a conductor capable of 72 MVA or 602 amps. Install breaker at Lacassine. Estimated cost: $13M ($2.5M for 2004) Expected In-Service Date: October 2010

11. 11 Existing Configuration of Lines 11, 12, 13, 14 & 16 Station with Breaker Non-Breaker Station LEGEND Station with Proposed Breakers Radial to Winn/Potter/Thornwell/ TexLake Chlomal IowaDerouen Lacassine Carter SerpentTupper Elton Compton Roanoke Lawtag Robbie Jennings Welsh Normally-Opened L11 L13 L16 L13A L12 L14

12. 12 Chlomal-Jennings Loop Upgrade (continued) For Modified Proposal: ContingencyOverload/Undervoltage Loss of Jennings-Lawtag Chlomal-Iowa 119% Loss of Carter-Lacassine Lawtag-Jennings 32% Loss of Chlomal-Lacassine Lawtag-Jennings 43% Loss of Lawtag-Compton Tupper, Serpent, Compton, Elton < 0.9 p.u. Possible solution: Upgrade 25.5 miles of line Chlomal to Carter and Jennings to Roanoke pt rated 33 MVA/ 39 MVA with a conductor capable of 93 MVA or 780 amps. Install breaker at Lacassine. Total Estimated cost: $13M ($3.5M for 2004) Expected In-Service Date: October 2010

13. 13 Modified Proposed Reconfiguration Radial to Winn/Potter/Thornwell/ TexLake ChlomalIowa Derouen Lacassine Carter SerpentTupper Elton Compton Roanoke Lawtag Robbie Jennings Welsh Station with Breaker Non-Breaker Station LEGEND Station with Proposed Breakers Lines that can be de- energized or taken out of service.

14. 14 McManus 69kV Substation: Replace Cap Bank & Correct Load PF McManus 69kV Substation is located north of Baton Rouge in East Feliciana Parish near the end of a 12 mile radial 69kV line. There will be approximately 70 MW of load in the area in 2004. Contingency: Loss of Port Hudson to Jackson 69kV will cause voltages less than 0.91 p.u. near the end of this line. Recommended Solution: Replace existing 18 MVAr capacitor bank with 1-30 MVAR capacitor bank. Estimated Cost: $550K 2004

15. 15 McManus 69kV Substation

16. 16 69kV Line 280 (Five Points -Erath) The 69kV substations Five Points, Texas Erath, Erath, and LeBlanc in Vermillion and Iberia Parishes are served by two sources, Meaux and Moril. The load served by the four 69kV substations will be approximately 41 MW in 2004. Contingency: Under peak loading conditions, loss of the Moril 138/69kV autotransformer can potentially overload a portion of Line 280 (Five Points to Erath) by 13% in 2004, that portion of line is composed of 4/0 ACSR and rated at 39MVA. Recommended Solution: Reconductor 5.01 miles of 69kV Five Points-Erath with a conductor capable of 72 MVA. Estimated Cost: $1.3M 2004

17. 17 69kV L280 (Five Points -Erath) These lines (Line 280 & 649) do not connect. TIGRE

18. 18 2005+ EGSI-LA Transmission Target Areas 69kV Jackson- Marydale Line Upgrade: ISD 2005 Coly-Hammond: Build 230kV line 2006 ISD 69 kV Lafayette-Holiday Line Upgrade: ISD 2006 Winn 69 kV 18MVAR Capacitor Installation: ISD 2005 69 kV Harelson-Flannery Rd Line Upgrade: ISD 2006 138 kV Willow Glen-Alchem Line Upgrade: ISD 2005

19. 19 Questions