1. DOE Energy/Water Interdependency TTX Steve Lewis Georgia Power Company April 25, 2007 “Electricity Systems Overview”

2. South Coastal Central West East Northeast Northwest Metro S. Metro E. Metro N Metro W. Georgia Power Facts & Figures Customers by region Metro Atlanta1,126,351 Central166,579 East145,917 Northeast165,063 Northwest169,883 South127,992 West137,932 Coastal265,959 Customers Georgia Power's customers as of December 31, 2006, totaled 2,305,676 in the following categories: Residential1,998,643 Commercial294,654 Industrial8,008 Other Retail4,371

3. Georgia Power Facts & Figures Generation Sources in 2006 74.4%Coal 18.2% Nuclear 6.2%Oil & Gas 1.2%Hydro Distribution Statistics: Line Miles 68,039 Circuit Miles 74,572 Cable / Wire Miles 204,480 Poles 1,806,492 Transformers 634,802 Distribution Substations 876 Street Lights (All Classes) 816,173 Distribution Feeders 2,042 Distribution Hq. Locations: Headquarters 49 Satelite Hq's. (Minimal Staff) 20 Total 69

11. Potential VoltagePressure Electrical Potential (measured in Volts) on the electrical transmission system is analogous to Pressure (measured in Pounds per square Inch, PSI) on the water system.

12. Power Watts Flow Rate Electrical Power (measured in Watts) on the electrical transmission system is analogous to Flow rate (measured in GPM) on the water system.

13. Energy Watt-hoursGallons Electrical Energy (measured in Watt-Hours) on the electrical transmission system is analogous to Total Water Delivered (measured in Gallons) on the water system.

14. Characteristics of Electricity u Travels at the speed of light. u Cannot be “stored” – long term u Cannot be “routed”

15. 100kV Lines 44kV Lines TRANSMISSION SUBSTATION 500kV or 230kV GENERATING STATION TRANSMISSION LINES GSU TRANSFORMER HOME OR BUSINESS (CUSTOMER) RETAIL SUBSTATION INDUSTRIAL OR CUSTOMER STATION To Other Loads and Generation Geographic Boundary Control Center 100kV Lines 44kV Lines TRANSMISSION SUBSTATION or 230kV GENERATING STATION TRANSMISSION LINES GSU TRANSFORMER HOME OR BUSINESS (CUSTOMER) RETAIL SUBSTATION INDUSTRIAL OR CUSTOMER STATION To Other Loads and Generation Geographic Boundary Control Center

16. Tie Lines 49 Tie Lines connect the Southern electrical system to neighboring utilities in the southeastern United States.                          JEA Duke SCE&G FPL FPC TVA Santee Cooper Tal Entergy AEC SMEPA

17. Questions?