Preliminary 2010 Base Case Assumptions

1. Preliminary 2010 Base Case Assumptions

3. Existing Generation Future Generation Regional Assumptions Dahlberg Hancock CC Rocky Mtn Warren Co Bio McDonough Vogtle Wansley West Georgia Washington Co CT Central AL Tenaska Rumble Road #1 CC Harris CC Appling Co Bio Kemper Farley SOWEGA McIntosh East Bainbridge Note: Resources indicated are preliminary. As remaining assumptions are provided, this information will be updated accordingly.

4. Preliminary Generation Assumptions for the 2010 Transmission Expansion Planning Process Red Text = No Longer a Resource Assumption Note: Resources indicated are preliminary. As remaining assumptions are provided, this information will be updated accordingly.

5. Preliminary Generation Assumptions for the 2010 Transmission Expansion Planning Process Red Text = No Longer a Resource Assumption Note: Resources indicated are preliminary. As remaining assumptions are provided, this information will be updated accordingly.

6. Preliminary Generation Assumptions for the 2010 Transmission Expansion Planning Process Red Text = No Longer a Resource Assumption Note: Resources indicated are preliminary. As remaining assumptions are provided, this information will be updated accordingly.

7. Preliminary Generation Assumptions for the 2010 Transmission Expansion Planning Process Red Text = No Longer a Resource Assumption Green Text = Re-Timing Resource Assumption Note: Resources indicated are preliminary. As remaining assumptions are provided, this information will be updated accordingly.

8. Stakeholder Feedback / Input

9. Projected 2010 SERTP Process

10. 1st Qtr Meeting – “First RPSG Meeting and Interactive Training Session” RPSG Formation Select Five Economic Planning Studies Interactive Training Session 2nd Qtr Meeting – “Preliminary Expansion Plan Meeting” Present Preliminary 10 Year Transmission Expansion Plan Stakeholder input and feedback regarding the plan…alternatives to consider. 3rd Qtr Meeting – “Second RPSG Meeting” Present Preliminary Results of the Five Economic Studies Stakeholder input and feedback regarding results…alternatives to solutions identified 4th Qtr Meeting – “Annual Transmission Planning Summit and Assumptions Input Present Final Results of the Five Economic Studies Provide an overview of the 10 Year Transmission Expansion Plan 2010 SERTP Process

11. Next Meeting

12. Adjourn