ATC details 10-year investment of $3.9bn to $4.8bn

American Transmission Co. will spend between $3.9bn and $4.8bn between 2012 and 2021 on transmission, the company said in its 10-year plan released Oct. 3. That amount is slightly above the $3.8bn to $4.4bn range ATC projected for its 10-year plan in October 2011.

Of the $3.9bn to $4.8bn, the company expects to spend $1.9bn on specific network projects, $800m on regional multi-value projects (MVPs), $1.1bn on asset maintenance and between $100m and $1bn on “other capital categories,” which can include developing projects, unspecified network projects, interconnections and infrastructure relocation, the company said.

Over 100 projects are needed over the next 10 years to address asset renewal – substation projects, including repairing circuit breakers, protective relays, lightning protection and transformers, ATC said.

Over 11 years, the company has invested $2.7bn in system improvements that have enhanced reliability, ATC said.

“Increasingly, we see those investments reflecting the trend toward more regional planning that improves broader-area reliability and strengthens the bulk electric markets,” the company said. 

Since 2001, ATC has upgraded 1,748 miles of transmission line, improved 155 substations and built 557 miles of new transmission line (45 lines). 

ATC in the plan also touched on the Midwest ISO’s (MISO) progress with respect to planning transmission solutions “that reduce congestion and enable public policy initiatives,” compliance with FERC Order 1000, the efforts of the Eastern Interconnection Planning Collaborative (EIPC) and MISO’s transmission expansion plan (MTEP).

ATC has divided its service territory into five zones, and within each has recommended network and asset renewal projects to address system limitations, the company said. The projects are categorized into those that are planned, proposed or provisional, consistent with categories used by MISO.

Zone 1

In Zone 1, North Central Wisconsin, ATC has currently planned 22 system reliability and economic projects between 2012 and 2026. The company highlighted five projects as the most notable, three of which are asset renewal projects and are driven by “condition and performance”: the Montello-Wautoma 69-kV rebuild; Plover-Whiting 115-kV rebuild; and Coyne-Saratoga 115-kV partial rebuild. The projects are scheduled to enter service in 2017, 2019 and 2020, respectively.

Of the other two projects, one is planned – the Monroe County-Council Creek 161-kV line, driven by low voltages, economics and avoiding reconfiguration during emergencies – and the other is provisional – the Fairwater-Mackford Prairie 69-kV line, driven by overloads and low voltages, ATC said. The projects are scheduled to come online in 2014 and 2018, respectively.

Zone 2 

In Zone 2, Michigan’s Upper Peninsula and Northern Wisconsin, there are 20 system reliability and economic projects between 2012 and 2026. ATC highlighted 14 projects that it considered the most notable among the three categories, seven of which are proposed:

  • the Atlantic-M38 69-kV line rebuild, driven by overloads, low voltages, condition and performance and scheduled to come online in 2013

  • the Straits-Pine River 69-kV double circuit rebuild, driven by overloads and low voltages and scheduled to come online in 2014

  • the Mackinac 138-kV Substation; Installation of back-to-back HVDC flow control device, to address and/or control flow across eastern U.P., overloads and low voltages, scheduled for 2014 service

  • the Chandler-Old Mead Road 138-kV double circuit lines, driven by overloads and low voltages and scheduled to come online in 2014

  • the Arnold 345-kV substation construction and 345/138-kV transformer, driven by overloads and low voltages and scheduled to come online in 2014

  • the BayLake GreenBay-Morgan-Plains-National 345-kV line construction, driven by overloads and low voltages and scheduled to come online in 2016-2018

  • the BayLake Holmes-Escanaba138-kV project, driven by overloads and low voltages and scheduled to come online in 2016-2018

The only provisional project in Zone 2 is the Seney-Blaney Park 69-kV line uprate, driven by overloads, low voltages, condition and performance and scheduled to enter service in 2015.

The six asset renewal projects in Zone 2, all driven by condition and performance, are:

  • the Nine Mile-Roberts 69-kV line partial rebuild, to come online in 2012

  • the Munising-Gwinn 69-kV line partial rebuild, to come online in 2012-13

  • the Rexton-Hiawatha 69-kV line partial rebuild, to come online in 2015

  • the Conover-Mass 69-kV line partial rebuild, to come online in 2018

  • the Powers-Chalk Hill 69-kV line partial rebuild, to come online in 2018

  • the Straits-McGulpin 138-kV submarine cable replacements, to come online in 2020.

Zone 3

In Zone 3, South Central/Southwest Wisconsin and North central Illinois, there are 49 system reliability and economic projects between 2012 and 2026, 15 of which are driven by ATC’s new Study-Based Rating Methodology.

ATC highlighted its Rockdale-Cardinal 345-kV line as its planned project, to enter service in 2013, and driven by overloads and low voltages, and the need to improve transfer capability to Madison area, avert voltage collapse and lower system losses.

The four proposed projects are:

  • the Sun Valley Tap-Oregon 69-kV line rebuild, to enter service in 2016, driven by overloads and the need to improve line condition and area voltages

  • the Badger Coulee: La Crosse area-North Madison-Cardinal, to enter service in 2018, driven by reliability, economics and public policy

  • the Spring Valley-North Lake Geneva 138-kV line construction, to enter service in 2019, driven by overloads and low voltages, and the need to provide network service

  • the Cardinal Bluffs: Dubuque County area-Cardinal 345-kV line construction, to enter service in 2019, driven by reliability, economics and public policy.

The six provisional projects, all of which are driven by overloads and low voltages, except for one, are:

  • the Colley Road-Brick Church 69-kV line rebuild, to enter service in 2018

  • the Gran Grae-Boscobel 69-kV line rebuild, to enter service in 2019, driven by overloads

  • the Lake Delton-Birchwood 138-kV line construction, to enter service in 2020

  • the Cardinal-Blount 138-kV line construction, to enter service in 2020

  • the Hubbard-East Beaver Dam 138-kV line construction, to enter service in 2022

  • the West Middleton-Pheasant Branch 69-kV line rebuild, to enter service in 2022

The seven asset renewal projects, all of which are driven by condition and performance, are:

  • the Doylestown-Rio Pumping Station 69-kV line rebuild, to enter service in 2013

  • the Dam Heights-Portage 69-kV line rebuild, to enter service in 2016

  • the Darlington-Hillman 138-kV line rebuild, to enter service in 2016

  • the Concord-Rubicon-Butler Ridge-Hartford 2016 138-kV line rebuild, to enter service in 2016

  • the Belmont-Rewey 69-kV line rebuild, to enter service in 2018

  • the Boscobel-Lone Rock 69-kV line rebuild, to enter service in 2018

  • the West Middleton-Stagecoach 69-kV underground 2019 cable replacement, to enter service in 2019

Zone 4

In Zone 4, northeast Wisconsin, there are 16 system reliability projects between 2012 and 2026. ATC highlighted five proposed projects, one provisional project and 15 asset renewal projects.

The proposed projects, to address overloads and low voltages and to accommodate new generation, are:

  • the Bay Lake: Green Bay area-Morgan 138-kV line construction, to enter service in 2016

  • the Pulliam-Glory Road 138-kV line conversion, to enter service in 2016

  • the Bay Lake: Green Bay area-Morgan-Plains-National 345-kV line construction, to enter service in 2016-2018

  • the Barnhart-Branch River project, to enter service in 2018

  • the Barnhart-Plymouth-Howards Grove-Erdman 138-kV line, to enter service in 2018

The only provisional project is the Shoto-Custer 138-kV line, to address overloads and scheduled to enter service in 2022.

All of the asset renewal projects are driven by condition and performance, and include:

  • the Dyckesville-Sawyer 69-kV line rebuild, to enter service in 2016

  • the University-Danz Avenue 69-kV underground cable replacement, to enter service in 2017

  • the Bayport-Sobieski-Pioneer 69-kV line rebuild, to enter service in 2018

  • the Oak Street-Highway V-Finger Road-Danz Ave 69-kV line rebuild, to enter service in 2018

  • the Caldron Falls-Goodman 69-kV line rebuild, to enter service in 2019

  • the Erdman-Lodestar 138-kV underground cable replacement, to enter service in 2019

  • Custer-New Holstein 69-kV line rebuild, to enter service in 2019

  • the Wesmark-Manrap 69-kV line rebuild, to enter service in 2020

  • the Finger Road-Canal 69-kV line rebuild, to enter service in 2020

  • the North Appleton-Butte des Morts-Neevin-Woodenshoe-Mears Corners- Sunset Point 138-kV line rebuild, to enter service in 2020

  • the Edgewater-Erdman 69-kV underground cable replacement, to enter service in 2021

Zone 5

In Zone 5, southeast Wisconsin, the most notable projects are:

  • the Pleasant Prairie-Zion Energy Center 345-kV line construction, driven by economics and scheduled to enter service in 2013

  • the Milwaukee County T-D 138-kV lines, driven by the transmission/distribution interconnection and scheduled to enter service in 2015

  • the Arcadian-Waukesha 138-kV line rebuilds, driven by overloads and scheduled to enter service in 2016

  • the Spring Valley-North Lake Geneva 138-kV line construction, driven by overloads and low voltages, to provide network service, and scheduled to enter service in 2019.

The one provisional project in Zone 5 is the replacement of the Arcadian 345/138-kV transformers with single transformer, scheduled to be complete in 2020, and to address overloads.

Asset renewal projects in Zone 5, all of which are driven by condition and performance, include:

  • the St. Lawrence-Hartford 138-kV line rebuild, to enter service in 2014

  • the Concord-Cooney 138-kV line rebuild, to enter service in 2015

  • the Waukesha-Merrill Hills 138-kV line partial rebuild, to enter service in 2016

  • the Paris-Albers 138-kV line rebuild, to enter service in 2017

  • the Merrill Hills-Summit 138-kV line partial rebuild, to enter service in 2017

  • the Mukwonago-Edgewood-St. Martins 138-kV line rebuild, to enter service in 2017

  • the Oak Creek-Hayes 138-kV line rebuild, to enter service in 2019

  • the Summit-Cooney 138-kV line rebuild, to enter service in 2021

  • the Paris-Burlington 138-kV line rebuild, to enter service in 2021

  • the St. Lawrence-Barton-Auburn 138-kV line rebuild, to enter service in 2022

About Rosy Lum 525 Articles
Rosy Lum, Analyst for TransmissionHub, has been covering the U.S. energy industry since 2007. She began her career in energy journalism at SNL Financial, for which she established a New York news desk. She covered topics ranging from energy finance and renewable policies and incentives, to master limited partnerships and ETFs. Thereafter, she honed her energy and utility focus at the Financial Times' dealReporter, where she covered and broke oil and gas and utility mergers and acquisitions.