Dealing with Catastrophic Storm Issues

January 2009 SE Missouri Ice Storm

Missouri PSC Storm WorkshopPresented by

Dave Wakeman

Manager, Distribution Operating

AmerenUE

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

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

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

Missouri Counties Served by AmerenUE That Were Affected

Cape Girardeau Dunklin Mississippi New Madrid Pemiscot Scott Stoddard

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

Issues and responses Storm damage

continues until the ice melts

Then came the mud - needed farmer’s equip.

SEMO Ice Storm Resource Counts by Day

0

500

1000

1500

2000

2500

Day1

Day2

Day3

Day4

Day5

Day6

Day7

Day8

Day9

Day10

Day11

Line/Trouble

Vegetation

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

Resource Summary

Linemen 2400 Vegetation 555 Field Checking 160 Logistics 70 Stores 85 Other Support Personnel 730 Total Resources 4000

Percent of Customers Restored by DayCumulative

1%6%

17%

30%

48%

60%

76%

94% 98% 100% 100%

0%

20%

40%

60%

80%

100%

120%

Day1

Day2

Day3

Day4

Day5

Day6

Day7

Day8

Day9

Day10

Day11

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

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

Distribution System Many towns required significant re-builds

Logistics

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

Logistics

15,500 hotel room nights 2300 alternative sleeping arrangements

—bunk trailers, dorms, etc. 76,000 meals 1250+ loads of laundry 44 buses

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

Supply Chain IssuesComparison: SEMO Ice Storm vs. Sept 14, 2008 Storm (Hurricane Ike)

SEMO Ice Storm36,000 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

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