Dealing with Catastrophic Storm Issues January 2009 SE Missouri Ice Storm

1. Dealing with Catastrophic Storm IssuesJanuary 2009 SE Missouri Ice Storm Missouri PSC Storm Workshop Presented by Dave Wakeman Manager, Distribution Operating AmerenUE

2. Monday, January 26Preparation and Advanced Warning • Quantum Weather predicts the possibility of ice storm in southern 1/3 of state • Mobilized contractor resources and Missouri Valley resources to SEMO south • Mobilized 3 storm trailers and 1 Mobile Command Center

3. And it startsTuesday, January 27 • At 4 a.m. only 800 customers out—just the beginning • Major ice accumulation occurring throughout the day in SEMO south area • Decision made to move all available AmerenUE resources to SEMO • Outage numbers climb throughout the day • Additional contractor resources procured • 650 linemen and 350 tree trimmers engaged by end of day

4. Significant Ice Formation Wednesday, January 28 • Ice continues to build—outage count over 36,000 in A.M. • 6 counties in Bootheel are essentially without power • Decision made to use Extensive Damage Recovery Method • SEMO south divided into 8 “work islands” • 1150 linemen and 450 tree trimmers engaged by end of day

5. Missouri Counties Served by AmerenUE That Were Affected • Cape Girardeau • Dunklin • Mississippi • New Madrid • Pemiscot • Scott • Stoddard

6. Issues and responses • Dense fog in morning caused black ice, generally dangerous driving conditions. • Widespread damage - added storm trailers bringing the total to 8 • Long repair times- Installed 3-2MVA generators to supply power for 2 towns

7. Issues and responses • Storm damage continues until the ice melts • Then came the mud - needed farmer’s equip.

8. Mutual Assistance from: Texas, Iowa, Illinois, Georgia, Tennessee, Kansas, Oklahoma Alabama, Missouri

9. Resource Summary • Linemen 2400 • Vegetation 555 • Field Checking 160 • Logistics 70 • Stores 85 • Other Support Personnel 730 • Total Resources 4000

11. Major Restoration Obstacles • Extensive widespread severe damage • Sub-transmission System • Distribution System • Logistics • No power in the entire region for nearly 4 days • Rural Area—limited infrastructure • Supply Chain

12. Widespread Damage • Virtually 100% of AmerenUE customers in 6 counties without power • 34 kV Sub-transmission System • 25 circuits out of service and requiring major repair • Portageville 71 (34kV) 30 miles long with 1 pole left standing • 35 distribution substations without power • 20 customer subs without power • Distribution System • 163 distribution circuits out of service

13. Distribution System Many towns required significant re-builds

14. Logistics

15. Logistics Issues • On Wednesday night we had rooms but they all lost power as the lineman were bedding down • Logistics issues were significant – enlisted help of a logistics company

16. Logistics • 15,500 hotel room nights • 2300 alternative sleeping arrangements—bunk trailers, dorms, etc. • 76,000 meals • 1250+ loads of laundry • 44 buses

17. Accomplishments • Portageville 71 Re-build • 30 miles of line supplying 2 towns • Completely re-built entire circuit in 3 ½ days using 500 linemen • Collaborated with SEMA and REC’s to transition resources to Co-ops • Participated in twice daily SEMA conference calls • Provide daily restoration status updates

18. SEMO Ice Storm 36,000 customers out Major Material Installed 3800 poles 7000 cross arms 700 transformers 1,440,000 ft of wire (273 miles) Sept 14, 2008 Wind Storm (Hurricane Ike) 161,000 customers out Major Material Installed 38 poles 295 cross arms 58 transformers 69,000 ft of wire Supply Chain IssuesComparison: SEMO Ice Storm vs. Sept 14, 2008 Storm (Hurricane Ike)

19. Conclusions • Emergency Plan designed to manage this contingency • Logistics Plan was stretched to it’s limits—many improvement opportunities identified • Supply Chain process stretched to it’s limit—many improvement opportunities identified • Preparation and advanced planning keys to success along with after-action review