Storm Hardening Initiatives

Robert Schimmenti VP Engineering and PlanningConsolidated Edison Company of New York, Inc.June 12, 2013

Pre-Sandy Infrastructure Investments

2

• Since 1992 nor'easter– Raised critical equipment to

enhance flood protection

– Upgraded pumps and flood gates

– Installed protective moats

• Since Hurricane Katrina– New transformers and network

protectors in flood zones must be submersible or installed above flood level

– New submersible equipment tested to operate under 25 feet of brackish water

Limiting Damage to Overhead System– Aggressive tree trimming to reduce

storm damage to power lines– Monthly aerial inspections and semi-

annual ground patrol inspection of transmission line rights-of-way

Additional Investments– Control centers can remotely monitor

power flow, feeder status, and switches

– Operators can remotely operate breakers and switches to manage the grid and improve restoration lines

Region Customer Outages

Bronx 75,406

Brooklyn 143,088

Queens 160,893

Staten Island 179,530

Manhattan 235,451

New York City Total 794,368

Westchester County 320,926

Con Edison System Total 1,115,294

Sandy Impact

3

Historical Storm Comparison

Date Type of Storm Customers Interrupted

29-Oct-12 Super storm Sandy 1,115,000 *

28-Aug-11 Hurricane Irene 203,821

13-Mar-10 Nor'easter 174,800

29-Oct-11 Nor'easter 135,913

9-Sep-85 Hurricane Gloria 110,515

2-Sep-06 Tropical Storm Ernesto 78,300

25-Feb-10 Snow 65,200

18-Jan-06 Wind / Rain 61,486

31-Mar-97 Nor'easter 45,180

19-Oct-96 Nor'easter 41,830

*Note: includes Nor'easter Athena

4

Rye Playland Base Camp

Westchester Tree Impact

7

• Advanced Equipment

• Selective Undergrounding

• Reduce Segment Size

• Sacrificial Components

• Enhanced Technology

Overhead Distribution Initiatives

Armonk Loop - Overview

• Armonk Loop Split

– Extend new feeder

– Armonk loop into two loops

– New storm hardened cable

VRS

Tie

14W03 7W4514W10

Armonk Loop

S/S S/S

Pleasantville Millwood West

Mid-point

Mid-point

VRS

Banksville Loop

Tie

Mid-point

Mid-point

VRS

VRS

8

9

East 14th Street and Avenue C

Impact of Sandy on Con Edison Facilities

10

4 Hours of Salt Water Corrosion

1111

11

12

Sandy Water Mark

Flood Walls Around Control Equipment

High Capacity Pumps

13

Elevate Critical Components

Con Edison Designed Enclosure Lift

14

Underground Network System Network Reconfiguration

Bowling Green: 123 MW

Fulton: 115 MW

New Sub-Networks

Utilize Latest Technology

Harden Components

Mitigate Impact

Facilitate Restoration

15

Underground Smart Switch

16

17

Submersible Transformer Switch

18

Storm Hardening Initiatives

Robert Schimmenti VP Engineering and PlanningConsolidated Edison Company of New York, Inc.June 12th, 2013