Rebuilding the Transmission Grid: Hurricanes Laura, Delta and Zeta Hurricane Laura Peak Outages: 615,360 Damages: 14,000 poles 50% Restoration: Aug. 29 4,600 transformers 90% Restoration: Sept. 11 29,600 wire spans Full Restoration: Oct. 1 (33 days) 300 substations Resources: 26,000 workers/31 states 225 transmission lines
Hurricane Delta Peak Outages: 493,370 Damages: 1,500 poles 50% Restoration: Oct. 10 500 transformers 90% Restoration: Oct. 12 3,930 wire spans Full Restoration: Oct. 17 (8 days) 215 substations Resources: 14,800 workers/27 states 160 transmission lines
Hurricane Zeta Peak Outages: 482,360 Damages: 2,750 poles 50% Restoration: Oct. 30 570 transformers 90% Restoration: Nov. 2 1,800 wire spans Full Restoration: Nov. 12 (15 days) 30 substations Resources: 7,800 workers/22 states 40 transmission lines 2 H I S T O R I C STORMHurricane Laura
Laura’s historic intensity caused severe damage to the Entergy distribution and transmission systems resulting in nearly 616,000 outages at its peak and impacting more than 919,000 customers in total.
Laura made landfall in Cameron, Louisiana, early Aug. 27 as a catastrophic Category 4 hurricane with maximum sustained winds of 150 mph.
The eye wall, which brings the most damaging winds and intense rainfall, passed directly over Lake Charles causing widespread damage to that area and our system. It continued as a Category 2 hurricane, still maintaining nearly 110 mph sustained winds, as it moved inland and northward across our service territory.
3 UNPRECEDENTED DAMAGE Hurricane Laura
Transmission Line Damage Comparison 2,000 Major Hurricanes (2005 – present) 96% of all structures destroyed by Laura 1,600 were in three southwest Louisiana 1,200 parishes
800
400 ~25% of all existing transmission 0 structures in Calcasieu parish (greater Laura Rita Katrina Ike Gustav Delta Zeta Easter Isaac Harvey (2020) (2005) (2005) (2008) (2008) (2020) (2020) Storm (2012) (2017) Lake Charles, LA area) were either (2020) destroyed or sustained damage by
Transmission Structures Destroyed Transmission Structures Damaged Hurricane Laura 4