Zone 5 – Southeast Wisconsin · Peak electric demand typically occurs during the summer months....

Helping to keep the lights on,

businesses running andcommunities strong®

An excerpt from ATC’s 2011 10-Year Transmission System AssessmentAn annual report describing economic and regional solutions to electric reliability needs

Zone 5 – Southeast Wisconsin

Zone 5www.atc10yearplan.com

KENOSHAMILWAUKEE

OZAUKEERACINE

WASHINGTONWAUKESHA

2 www.atc10yearplan.com

www.atc10yearplan.com

Cost estimate of system improvements 2007 2008 2009 2010 2011

Total 10-Year Capital Cost $2.8B $2.7B $2.5B $3.4B $3.8/ $4.4B

Transmission is the vital link in bringing power to communitiesTransmission lines move electricity at high voltages over long distances – from power plants to communities where local utilities deliver power to homes and businesses via distribution lines. A reliable transmission network provides access to many sources of power, whether they are local or regional. Having multiple paths to get power from producers to consumers lessens the chance that they will experience service interruptions.

While reliably meeting the needs of electricity customers is the top priority for any transmission owner, market economics and public policy initiatives are playing a major role in how utilities plan for their system needs. Traditionally, transmission owners performed planning studies and analysis for their individual needs; today, however, while local reliability remains the responsibility of the owner, the trend is toward broader-based planning driven by regional transmission organizations, government agencies and electricity market economics.

Changing the way transmission system costs are allocated also affects the planning as well as permitting for system improvements. Regional planning initiatives increasingly focus on projects that provide additional benefits beyond local-area reliability. These multi-benefit, or Multi-Value Projects (as defined by Midwest Independent System Operator, Inc.), also include economic savings and the ability to move renewable energy from where it is generated to where it can be used. As these projects are identified, regulators from multiple states will need to work together to determine cost sharing as well as permitting. We are working diligently with all stakeholders to design an incremental regional build-out of these projects to move forward efficiently and cost-effectively.

Enforceable, mandatory reliability standards, developed by the North American Electric Reliability Corp. and approved by the Federal Energy Regulatory Commission in 2007, also play a role in how we plan, operate and maintain our system. Earlier this year, NERC issued a set of high-priority reliability issues to help the industry focus on standards setting, compliance, training and education. Several of those priorities, including a changing resource mix and the integration of new technologies, will impact the way we plan and operate our system.

Our planning process also is affected by pending Environmental Protection Agency regulations for electric generators and the recently issued FERC Order 1000 governing regional planning, public policy requirements and cost allocation.

The 2011 Assessment covers the years 2011 through 2020 and indicates a need for $3.8 to $4.4 billion in transmission system improvements. The total includes $1.0 billion in specific network projects, $1.0 billion in asset maintenance, $0.7 billion in multi-benefits projects, and this year a range of $1.1 to $1.7 billion in other capital categories. Other capital categories can include developing or unspecified network projects, interconnection projects and infrastructure relocation.

Economics, public policy increasingly influence transmission planning

Mandatory reliability standards, renewable portfolio requirements affect plans

2011 ATC 10-Year Assessment 3

Electric System Overview

Small increases expected in population, employmentPopulation in Zone 5 is projected to grow 0.5 percent annually between now and 2020, and employment is projected to grow 0.8 percent in the same time period.

Waukesha County is projected to realize the largest increase in both population and employment.

Electricity usage growingPeak electric demand typically occurs during the summer months. Large industrial loads in the Milwaukee metropolitan area, including Charter Steel and Miller Brewing, are among the largest electricity users in the zone.

Electric load is projected to grow approximately 1.25 percent annually through 2020.

Helping to keep the lights on, businesses running and communities strong®

Southeast Wisconsin – Zone 5


KENOSHA

RACINE

WASHINGTON

WAUKESHA MILWAUKEE

OZAUKEE

Transmission system characteristics in Zone 5ATC delivers power in Zone 5 with various transmission facilities including:

The southern portion of 345-kV lines from Point Beach and Edgewater,

The Saukville, Arcadian, Granville, Oak Creek, and Racine 345/138-kV substations,

The transmission lines emanating from the Pleasant Prairie and Oak Creek power plants,

230-kV facilities near Milwaukee, and

A significant 138-kV network in the Milwaukee area, a portion of which is underground.

Apart from the analysis performed in this Assessment, there is one major area event that could impact transmission plans in Zone 5. The proposed road rebuild of the Zoo interchange is moving forward with the following in-service dates:

Expand/update Watertown Plank area (2013),

Expand/update Highway 100/Highway 45 area (2014), and

Expand/update remainder of freeway (2015-2018).

The analyses of this road relocation project will likely result in new projects to reconfigure the transmission system around Bluemound and 96th Street substations. Further projects may develop depending on the Department of Transportation’s plans to rebuild the interchange. Studies are ongoing and plans will be finalized in the 2011-2012 timeframe.

Transmission system limitations in Zone 5Key system performance issues in Zone 5 include:

Heavy flows on aging facilities,

Heavy flows from the west (Zone 3) resulting in heavily loaded 138-kV facilities in the western portion of Zone 5,

Heavy market flows from and to the south, resulting in high 345-kV and 138-kV line loadings and the need to monitor potential multiple contingency conditions, and

Sagging voltage profile in portions of Washington and Waukesha counties.

Transmission system reinforcements needed to interconnect and deliver the new generation at the Oak Creek Power Plant comprised much of the recent expansion to Zone 5. Load growth in Waukesha and Washington counties is projected to exceed the capabilities of the existing 138-kV system in those areas, signaling the need for future transmission system reinforcements.

System Limitations Southeast Wisconsin – Zone 5

KENOSHA

MILWAUKEE

OZAUKEE

RACINE

WASHINGTON

WAUKESHA

Zone 5 includes the counties of:



Lake Michigan

ILLINOIS

Bain

Swan

Tosa

Paris

Zenda

Hayes

Auburn

Albers

Somers

Butler

Barton

Walker

Mequon

Sussex

Greves

Sharon

Branch

Ramsey

Center

Cooney

Summit

Racine

Kansas

Barland

Glacier

Tibbits

Montana

St Rita

Lincoln

Mill Rd

Hubbard

Norwich

Horicon

Raymond

Rubicon

28th St

Delavan

96th St

68th St

Holland

Everett

Elkhorn

Kenosha

Edgewood

Tichigan

Hartford

Lakeside

Arcadian

O Connor

Allerton

Tamarack

Waukesha

Fredonia

Mayville

Moorland

Parkland

Glendale

Lakeview

Walworth

Lafayette

Park Hill

Brookdale

Saukville

Butternut

FiebrantzShorewood

Bluemound

Cedarsauk

Mukwonago

Granville

Maple (WE)

Burlington

Bark River

St Martins

Whitewater

Katzenberg

Hustisford

Dewey (WE)

Root River

Cobblestone

Arthur Road

West Darien

Bluff Creek

Lake Geneva

Air Liquide

Sugar Creek

Harbor (WE)

St Lawrence

Butler Ridge

Pennsylvania

Williams Bay

Brick Church

Duplainville

Spring Brook

Random Lake

Richmond Road

Charter Steel

Concord SW YD

Merrill Hills

West Junction

Range Line SW

Bristol (ALTE)

Nicholson (WE)

Juneau Downtown

Cedarburg South

Cottonwood (WE)

University (WE)

Range Line Dist

Pleasant Valley

Germantown SW YD

Haymarket Square

Juneau Northside

Oak Creek SW YD

Horicon Ind Park

Juneau Industrial

Southwest Delavan North Lake Geneva

South Lake Geneva

Twin Lakes (ALTE)Spring Valley (WE)

Cornell - Milwaukee

Elm Road 345 Sws Yd

Port Washington SW YD

Oak Creek 230kV SW YD

Milwaukee

Mequon

Franklin

Muskego

New Berlin

Kenosha

Germantown

Oak Creek

Brookfield

Pewaukee

Racine

Pleasant Prairie

Waukesha

Menomonee Falls

Delafield

Wauwatosa

Greenfield

West Bend

West Allis

Elkhorn

Sussex

Delavan

Glendale

Hartford

Cudahy

Twin Lakes

Greendale

Grafton

Burlington

Hartland

Oconomowoc

Slinger

River Hills

Chenequa

Lake Geneva

Horicon

Watertown

Wales

East Troy

Merton

Brown Deer

Cedarburg

Mayville

Saukville

Lannon

Jackson

Sturtevant

Fox Point

Elm Grove

Bayside

Whitewater

Williams Bay

Waterford

Lomira

Hales Corners

Eagle

North Prairie

Belgium

Paddock Lake

Mukwonago

South MilwaukeeBig Bend

St. Francis

Port Washington

Juneau

Darien

Genoa City

NashotahOconomowoc Lake

Cedar Grove

Fontana-on-Geneva Lake

Fredonia

Palmyra

Whitefish Bay

Walworth

Shorewood

SullivanDousman

Silver Lake

Kewaskum

Union Grove

Sharon

Butler

Random Lake

Wind Point

Thiensville

Theresa

Hustisford

Newburg

Neosho

Campbellsport

West Milwaukee

Iron Ridge

Rochester

Lac La Belle

Clyman

Kekoskee

BrownsvilleWaupun

North Bay

Elmwood Park

D o d g e

W a u k e s h a

W a l w o r t h

R a c i n e

W a s h i n g t o n

K e n o s h a

O z a u k e e

J e f f e r s o n

M i l w a u k e e

S h e b o y g a nF o n d d u L a c

Low voltagesOverloaded facility

System Limitations Key



We have implemented three projects in Zone 5 since the 2010 Assessment, most notably the interconnection of the new 650 MW (615 MW net) generator at the Oak Creek Power Plant.

Our current plans in Zone 5 include ten system reliability and economic projects between 2011 and 2025. These projects are in various stages of development. The most notable planned, proposed, provisional and asset renewal projects in Zone 5, along with their projected year of completion and the factors driving the need for the projects, are listed below.

Transmission projects in Zone 5 Southeast Wisconsin – Zone 5 KENOSHA

RACINE

WASHINGTON

WAUKESHA MILWAUKEE

OZAUKEE

System Solutions Key

New substationSupports transmission system expansion

Substation modificationsUpgrades equipment ratings to avert facility overloads

TransformerSupports local growth and improves voltage levels

Capacitor bank or reactorRelieves low voltages or high voltages

T-D interconnectionSupports local growth

345-kV transmission line

115-, 138- or 161-kV transmission line

Rebuilt 115- or 138-kV transmission line

Transmission line voltage conversion


Rebuilt 69-kV transmission line

69 kV

115 kV

138 kV

161 kV

230 kV

345 kV

69 kV

115 kV

138 kV

161 kV

230 kV

345 kV

SUBSTATION KEY

SUBSTATION KEY TRANSMISSION LINE KEY

TRANSMISSION LINE KEY

EXISTING TRANSMISSION LINES KEY


115-, 138- or 161-kV transmission line

Rebuilt 115- or 138-kV transmission line

Transmission line voltage conversion


Rebuilt 69-kV transmission line

New substationSupports transmission system expansion

Substation modificationsUpgrades equipment ratings to avert facility overloads

TransformerSupports local growth and improves voltage levels

Capacitor bankRelieves low voltages or high voltages

T-D interconnectionSupports local growth

EXISTING TRANSMISSION LINES KEY

Project description In-service Need driver year

Proposed projects

Pleasant Prairie-Zion Energy Center 345-kV line 2014 Economics

Milwaukee County T-D 138-kV lines 2015 T-D interconnection

Arcadian-Waukesha 138-kV line rebuilds 2016 Overloads

Provisional projects

Spring Valley-Twin Lakes-South Lake Geneva 138-kV line 2019 Overloads and low voltages, provide network service

Replace Arcadian 345/138-kV transformers with single transformer 2020 Overloads

Asset Renewal projects

Replace Bluemound 230/138-kV transformers 2011-2012 Condition and performance

St. Lawrence-Hartford 138-kV line rebuild 2014 Condition and performance

Concord-Cooney 138-kV line rebuild 2015 Condition and performance

Waukesha-Merrill Hills 138-kV line partial rebuild 2015 Condition and performance

Paris-Albers 138-kV line rebuild 2016 Condition and performance

Merrill Hills-Summit 138-kV line partial rebuild 2017 Condition and performance

Edgewood-St. Martins 138-kV line rebuild 2017 Condition and performance

Mukwonago-Edgewood 138-kV line rebuild 2017 Condition and performance

Oak Creek-Hayes 138-kV line rebuild 2019 Condition and performance

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T

T

C

T

SM

SM

SM

SM

SM

SM

SM

SM

SMSM

SM

SM

SM

SM

T-D

Lake Michigan

ILLINOIS to Zion Energy Center

Milwaukee County

Tosa

Bain

Albers

Walworth

Arcadian

Waukesha

Walworth

Cedarsauk

Bluemound

Mukwonago

Brick Church

Pennsylvania

Concord SW YD

Pleasant Valley

Pleasant Prairie

South Lake Geneva

North Lake Geneva

Oak Creek 230kV SW YD Oak Creek 138kV SW YD

Swan

Paris

Zenda

Hayes

Auburn

Albers

Somers

Butler

Barton

Walker

Mequon

Sussex

Greves

Branch

Ramsey

Center

Cooney

Summit

Racine

Kansas

Barland

Glacier

Tibbits

Montana

St Rita

Lincoln

Mill Rd

Hubbard

Norwich

Horicon

Raymond

Rubicon

28th St

Delavan

Holland

Everett

Elkhorn

Kenosha

Edgewood

Tichigan

Hartford

Lakeside

O Connor

Allerton

Tamarack

Waukesha

FredoniaMayville

Moorland

Parkland

Glendale

Lafayette

Park Hill

Saukville

Butternut

FiebrantzShorewood

Mukwonago

Granville

Maple (WE)

Burlington

Bark River

St Martins

Katzenberg

Hustisford

Dewey (WE)

Root River

Cobblestone

Arthur Road

Bluff Creek

Lake Geneva

Air Liquide

Sugar Creek

Harbor (WE)

Butler Ridge

Williams Bay

Duplainville

Spring Brook

Random Lake

Richmond Road

Charter Steel

Merrill Hills

Range Line SW

Bristol (ALTE)

Nicholson (WE)

Cottonwood (WE)

Pleasant Valley

Germantown SW YD

Haymarket Square

Juneau Northside

Southwest Delavan

Twin Lakes (ALTE)

Spring Valley (WE)

Cornell - Milwaukee

Port Washington SW YD

Oak Creek 230kV SW YD

D o d g e

W a u k e s h a

W a l w o r t h

R a c i n e

W a s h i n g t o n

K e n o s h a

O z a u k e e

M i l w a u k e eJ e f f e r s o n

S h e b o y g a nF o n d d u L a c

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Depending on the status of the projects shown, the transmission line additions may be for illustrative purposes only and may not reflect the actual routes.

ATC AT A GLANCEn Formed in 2001 as the first multi-state, transmission-only utility

n Owner and operator of approximately 9,440 miles of transmission line and 515 substations

n Meeting electric needs of more than five million people in 72 counties in four states: Wisconsin, Michigan, Minnesota and Illinois

n $2.9 billion in total assets

CONTACT Mail P.O. Box 47 n Waukesha, WI 53187-0047

Toll-free 1-866-899-3204

Web [email protected]

More detailed information is available at www.atc10yearplan.com

P.O. Box 47Waukesha, WI 53187-0047

www.atcllc.com

Would you like a speaker from ATC to address your group? Give us a call, toll-free, at 1.866.899.3204, ext. 6922.

Helping to keep the lights on, businesses running and communities strong®

Zone 5 – Southeast Wisconsin · Peak electric demand typically occurs during the summer months....

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