2011 SERTP Input 2011 SERTP Input Assumptions Assumptions 1 2011 - PowerPoint PPT Presentation

2010 SERTP 2011 SERTP Input 2011 SERTP Input Assumptions Assumptions 1

2011 Load Forecast 2011 Load Forecast

2011 Regional Generation 2011 Regional Generation Assumptions Assumptions Dahlberg Conasauga Hancock CC Rocky Mtn Warren Co Bio McDonough Vogtle Wansley Tenaska Piedmont Bio Washington Co CT Kemper Central AL Warthen CT West Georgia Franklin CC Harris CC Moselle SMARR CC Lee Road SOWEGA Baconton McIntosh East Bainbridge Farley Existing Generation Future Generation

2010 SERTP 2010 SERTP Initial Generation Assumptions for the 2011 Transmission Initial Generation Assumptions for the 2011 Transmission Expansion Planning Process Expansion Planning Process 2011 Assumptions 2010 Assumptions 2011 Assumptions 2010 Assumptions Site Site MW MW MW MW Year Year Year Year Site Site Site Site MW MW Dahlberg CT -100 100 Dahlberg CT - -100 -100 100 100 GTC - - GTC GTC GTC GTC GTC Dahlberg CT Dahlberg CT Dahlberg CT Dahlberg CT Franklin 2 Franklin 2 625 625 East Bainbridge East Bainbridge -72 -72 72 72 East Bainbridge East Bainbridge - - Lee Road CT Lee Road CT 100 100 Franklin 2 Franklin 2 Franklin 2 Franklin 2 625 625 625 625 McDonough 2 Coal -51 51 McDonough 2 Coal - 205 205 Lindsay Hill CC Lindsay Hill CC Lindsay Hill CC Lindsay Hill CC 205 205 Rocky Mountain 44 44 Rocky Mountain McDonough 2 Coal McDonough 2 Coal McDonough 2 Coal McDonough 2 Coal -51 - -51 - 51 51 -152 152 2011 2011 2011 2011 Wansley CC7 Wansley CC7 - Rocky Mountain Rocky Mountain 44 44 Rocky Mountain Rocky Mountain 44 44 Warthen CT CT 390 390 Warthen Warthen CT Warthen Warthen CT Warthen CT CT 390 390 390 390 MEAG MEAG Crisp Co Hydro Crisp Co Hydro -20 - 20 PS PS McIntosh 4 & 5 McIntosh 4 & 5 448 448 PS PS McIntosh 4 & 5 McIntosh 4 & 5 448 448 PS McIntosh 4 & 5 448 448 PS McIntosh 4 & 5 SoCo SoCo SoCo SoCo Farley 1 Uprate Farley 1 Farley 1 Farley 1 Uprate Uprate Uprate 35 35 35 35 35 SoCo SoCo Farley 1 Uprate Farley 1 Uprate 35 -625 -625 625 625 Franklin 2 Franklin 2 Franklin 2 Franklin 2 - - Franklin 2 - -625 625 Franklin 2 McDonough 2 Coal McDonough 2 Coal McDonough 2 Coal McDonough 2 Coal -200 -200 - - 200 200 -200 200 McDonough 2 Coal McDonough 2 Coal -

2010 SERTP 2010 SERTP Initial Generation Assumptions for the 2011 Transmission Initial Generation Assumptions for the 2011 Transmission Expansion Planning Process Expansion Planning Process 2011 Assumptions 2010 Assumptions 2011 Assumptions 2010 Assumptions Year Site MW Site MW Year Site MW Site MW 55 GTC Fitzgerald Bio 55 Fitzgerald Bio Fitzgerald Bio 55 55 GTC Fitzgerald Bio GTC GTC -49 49 McDonough 1 Coal - McDonough 1 Coal McDonough 1 Coal -49 - 49 McDonough 1 Coal SMEPA SMEPA Moselle Moselle 150 150 Wansley CC7 Wansley CC7 152 152 -620 620 SoCo SoCo Conasauga Conasauga - SMEPA Moselle 150 SMEPA Moselle 150 2012 2012 Farley 2 Uprate Farley 2 Uprate 35 35 SoCo SoCo Conasauga Conasauga -620 - 620 McDonough 1 Coal -202 202 McDonough 1 Coal - 35 Farley 2 Uprate Farley 2 Uprate 35 McDonough CC4 McDonough CC4 841 841 McDonough 1 Coal McDonough 1 Coal -202 - 202 841 McDonough CC5 McDonough CC5 841 McDonough CC4 841 McDonough CC4 841 50 Piedmont Bio Piedmont Bio 50 McDonough CC5 841 841 McDonough CC5 Piedmont Bio Piedmont Bio 50 50

2010 SERTP 2010 SERTP Initial Generation Assumptions for the 2011 Transmission Initial Generation Assumptions for the 2011 Transmission Expansion Planning Process Expansion Planning Process 2011 Assumptions 2011 Assumptions 2010 Assumptions 2010 Assumptions Site MW Site MW Year Year Site MW Site MW SoCo SoCo MEAG MEAG Central Alabama CC Central Alabama CC 885 885 44 44 Vogtle 1 Vogtle 1 2013 2013 SoCo SoCo 841 841 Central Alabama CC Central Alabama CC 885 885 McDonough CC6 McDonough CC6 McDonough CC6 McDonough CC6 841 841 - -44 44 Vogtle 1 1 Vogtle Site MW Site Site MW MW Site MW Year Year Site Site MW MW Year Year 75 75 78 78 GTC GTC Dahlberg CT Dahlberg CT GTC GTC East Bainbridge East Bainbridge 78 78 GTC GTC East Bainbridge East Bainbridge 90 90 50 50 SOWEGA SOWEGA Lee Road CT Lee Road CT 50 50 Lee Road CT Lee Road CT 100 100 90 90 Warren Co Bio Warren Co Bio 90 90 SOWEGA SOWEGA SOWEGA SOWEGA 2014 2014 SoCo Baconton CT CT -197 197 2014 2014 SoCo Baconton - 100 100 100 100 Warren Co Bio Warren Co Bio Warren Co Bio Warren Co Bio Dahlberg CT Dahlberg CT -292 - 292 SoCo SoCo Baconton CT Baconton CT CT CT -197 -197 - - 197 197 SoCo SoCo Baconton Baconton 600 Kemper IGCC Kemper IGCC 600 Dahlberg CT Dahlberg CT Dahlberg CT Dahlberg CT -292 -292 - - 292 292 Kemper IGCC Kemper IGCC 600 600 600 600 Kemper IGCC Kemper IGCC

2010 SERTP 2010 SERTP Initial Generation Assumptions for the 2011 Transmission Expansion Planning Process 2011 Assumptions 2010 Assumptions 2011 Assumptions 2010 Assumptions Site MW Site Site MW MW Year Year Site Site MW MW Year Year Site MW GTC GTC Branch Branch -45 - 45 GTC GTC Dahlberg CT Dahlberg CT 300 300 GTC GTC Dahlberg CT Dahlberg CT 300 300 East Bainbridge -78 78 Dahlberg CT Dahlberg CT 187 187 East Bainbridge - ** ** East Bainbridge East Bainbridge -78 - 78 Gaston 1&2 Gaston 1&2 -52 - 52 -50 - 50 Lee Road CT Lee Road CT -50 - 50 ** ** Lee Road CT Lee Road CT 2015 2015 2015 2015 Scherer 3 -62 62 605 605 Scherer 3 - SMARR CC SMARR CC 605 605 SMARR CC SMARR CC SMARR CC 605 -90 - 90 SMARR CC 605 SOWEGA SOWEGA -90 - 90 SOWEGA SOWEGA SOWEGA -90 90 734 734 SOWEGA - Washington Co CT 734 Washington Co CT Washington Co CT 734 Washington Co CT Washington Co CT 734 Washington Co CT 734 Yates Yates - -122 122 MEAG MEAG Vogtle Vogtle 2 2 44 44 Vogtle Vogtle 2 2 -44 - 44 SoCo SoCo **Was not a generation assumption in 2014 either

2010 SERTP 2010 SERTP Initial Generation Assumptions for the 2011 Transmission Expansion Planning Process 2010 Assumptions 2011 Assumptions 2010 Assumptions 2011 Assumptions Site Site MW MW Year Year Year Year Site Site MW MW Site Site MW MW 16 16 16 16 16 Dalton Dalton Dalton Dalton Vogtle Vogtle Vogtle 3 Vogtle 3 3 3 Dalton Vogtle 3 3 16 Dalton Vogtle GTC GTC Dahlberg CT Dahlberg CT -300 -300 - - 300 300 GTC GTC Dahlberg CT Dahlberg CT GTC GTC Dahlberg CT Dahlberg CT 188 188 330 330 Vogtle Vogtle 3 Vogtle 3 Vogtle 3 3 330 330 Vogtle 3 3 330 Vogtle 330 2016 2016 2016 2016 Warthen CT Warthen CT CT CT -70 -70 - - 70 70 Warthen Warthen Warthen Warthen CT CT -70 - 70 MEAG MEAG MEAG MEAG Vogtle 3 Vogtle Vogtle Vogtle 3 3 3 250 250 250 250 MEAG Vogtle 3 3 250 MEAG Vogtle 250 SoCo SoCo Vogtle 3 Vogtle 3 3 3 504 504 504 504 SoCo Vogtle 3 3 504 SoCo SoCo Vogtle Vogtle SoCo Vogtle 504 Site MW Site MW Year Year Site MW Site MW 16 16 16 16 Dalton Dalton Vogtle Vogtle 4 4 Dalton Dalton Vogtle 4 Vogtle 4 GTC Vogtle 4 4 330 330 GTC Vogtle 4 4 330 330 GTC Vogtle GTC Vogtle 561 561 Wansley Wansley CC6 CC6 561 Wansley Wansley CC6 CC6 561 2017 2017 MEAG Vogtle 4 4 250 250 MEAG Vogtle 4 4 250 250 MEAG Vogtle MEAG Vogtle 504 504 SoCo SoCo Vogtle Vogtle 4 4 504 SoCo SoCo Vogtle 4 Vogtle 4 504 Wansley CC6 CC6 -561 - 561 Wansley CC6 CC6 -561 - 561 Wansley Wansley

2010 SERTP 2010 SERTP Initial Generation Assumptions for the 2011 Transmission Expansion Planning Process 2010 Assumptions 2010 Assumptions 2011 Assumptions 2011 Assumptions Year Site Site MW MW Site Site MW MW Year N/A N/A 2018 N/A N/A 2018 Site Site MW MW Site MW Year Year Year Year Site Site MW MW Site MW PS PS McIntosh 6 McIntosh 6 McIntosh 6 McIntosh 6 187 187 187 187 PS McIntosh 6 McIntosh 6 187 187 PS PS PS Hancock CC1 Hancock CC1 840 840 Harris 2 -628 628 2019 2019 2019 2019 SoCo SoCo SoCo SoCo Hancock CC1 Hancock CC1 840 840 SoCo SoCo Harris 2 - Harris 2 Harris 2 -628 -628 628 628 Harris 2 Harris 2 - - Year Year Site Site Site Site MW MW MW MW Site Site MW MW Year Year 2020 2020 840 840 2020 2020 SoCo SoCo SoCo SoCo Hancock CC2 Hancock CC2 Hancock CC2 Hancock CC2 840 840 N/A N/A Year Site Site MW MW Year Site MW Site MW N/A 2021 N/A SoCo **Hancock CC1 940 940 2021 SoCo **Hancock CC1 **Delayed from 2019