Storm Hardening Initiatives at Con Edison

May 7th, 2014

Luciano VillaniDepartment Manager, Project Engineering,

Con Edison

2

Network Systems Non-Network Systems

Generating Station(electricity generated at 13.8 to 22.0 kV)

Transmission Substation

Area Substation(voltage stepped down to primary distribution voltage)

Transformers(voltage stepped down to 480, 208, or 120 V)

Feeders

Con Edison Overview

Super Storm Sandy Statistics

• Largest Atlantic storm on record spanning 1,000 miles

• Impacted over 8.5 million customers across 21 states

• Sustained winds reached 64 mph at LaGuardia Airport with peak gust of 90 mph on Staten Island

• 14.06 foot storm tide recorded at Battery Park

Super Storm Sandy Impact to Con Edison

• 1.1 million customer outages

• Lost 4,000 MW of generation

• 60% of 345 kV feeders lost

• 5 transmission substations– 11 Manhattan networks

– 3 Staten Island area stations

• 2 steam stations and 561 steam customers impacted

• 398 gas services interrupted

4

Con Edison Response

• Service Restoration – restore service as quickly as possible

• System Normalization – repair equipment damage

• Site Assessments

– Multidiscipline engineering teams visited all impacted stations

– Identification of critical impacted equipment and water infiltration

– Conceptual storm hardening scopes and estimates

• Immediate Storm Hardening (June 1, 2013)

• Long-Term Storm Resiliency

5

6

Sandy Aftermath TimelineOct 2012 Jan 2013 Apr 2013 July 2013 Oct 2013 Jan 2014

Sandy Hits

Normalization

Immediate/Phase 1 Storm Hardening

Phase 2 (thru 2017)

June 1, 2013 – Construction Complete

71

East River Substation

E13th Street Substation

East 14th Street

FDR

Aven

ue C

East River Generating

Station

Substations & Generating Stations

Typical SubstationPre-hardening

Power Transformer

Breaker

Dis

conn

ect

Poth

ead

Stan

d

BreakerControl Room Pumping

Plant

Power line Control/protection line(s) Oil line

Terminal boxInsulator To Distribution

From Transmission

Rel

ay

Hou

se

Dis

conn

ect

Poth

ead

Stan

d

Sewer Drain

Immediate Hardening ScopeJune 1st, 2013

New walls/barriers around critical equipment

New sump pumps

Sealed conduit penetration points with RTV

Shrink wrap important control boxes

Install backup nitrogen pumps

Raised equipment where feasible and

economic

Valve-off sewer drains

Governing flood control elevation, higher of:

1. SLOSH 2010

2. 2007 FEMA 100-yr flood +2 feet

3. Witnessed Sandy level

Breaker

Dis

conn

ect

Poth

ead

Stan

d

Breaker

Rel

ay

Hou

se Control Room Pumping

Plant

Power line Control/protection line(s) Oil line

Terminal boxInsulator To Distribution

From Transmission

Power Transformer

Flood Control Elevation

Dis

conn

ect

Poth

ead

Stan

d

Sandy Flood Elevation

Sewer Drain

June 1, 2013 Accomplishments

• Work completed at 9 Substations and 3 Generating Stations

– 54 new concrete moats (6100 LF)

– 210 flood doors and barriers

– 81 submersible pumps

– 21 high capacity diesel pumps

– Approx. 3000 conduit and trough seals

10

11

Con Edison Rate Case & Collaborative

• Filed January 2013

• All 3 commodities (Electric, Steam & Gas)

• Storm Hardening Program

– $1 billion Company-wide

– Projects span 2014 – 2017

• Storm Hardening Collaborative

– Cooperation among all interested rate case parties

– Risk prioritization and project justification

12

Collaborative Activities

• Collaborative Parties

– PSC, NYC, Attorney General, Utility Intervention Unit, EDF, Columbia Center for Climate Change, Local 1-2

• Benchmarking

– United Illuminating

– PSE&G

– Brooklyn Navy Yard

– NYC MTA

– Swedish Delegation

• With Collaborative

– 8 meetings and 2 field visits

– 3 detailed presentations

– 32 technical and economic questions/information requests

– 11 order of magnitude estimates

– Established flood control criteria (FEMA 100yr + 3’)

– Ongoing meetings

13

Next Steps – Phase 2 Storm Hardening

• More robust walls, doors and barriers

• Additional pumps with redundant feeds

• Backup generators

• Raise or relocate critical equipment

• New control room and automation system

2013 Flood

Protection Level0-8

Feet

New Flood

Protection Level 3-4Feet

Design Standard: FEMA 100 year flood level + 3 feet

(design level re-examined every five years)

14

Goethals – Proposed Perimeter WallBefore & After

• Interlocking metal sheet pile wall.

• 25 feet below grade

• 10 feet above grade

15

New Control Room & Lifting Electrical Panels

Digital HMI and Automation System

16

Questions?