American Transmission Co.

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ATC Development Co. invests in leading Canadian HVDC transmission developer – oneGRID Corp.


John Douglas, oneGRID, 416-453-8290,
Anne Spaltholz, ATC, 262-506-6933,

ATC Development Co. invests in leading Canadian HVDC transmission developer – oneGRID Corp.

Toronto, Ontario, August 24, 2017 – oneGRID Corp. announced that ATC Development Co. has invested development capital in oneGRID and has joined its Board of Directors. ATC Development Co. is the development branch of American Transmission Co., formed by its investor-owned utility members to pursue development outside of ATC’s traditional Midwestern United States footprint.

oneGRID, a Canadian independent transmission developer with projects in North and South America, is developing a portfolio of utility-scale high-voltage direct current transmission projects using underwater submarine cables. The principals of oneGRID have significant HVDC development experience including the 1,000 megawatt Lake Erie Connector, the 1,000 MW Empire State Connector and the 1,000 MW Champlain Hudson Power Express. oneGRID focuses on unlocking renewable generation by using proprietary and innovative submarine routes that solve for transmission congestion that will facilitate regulators to achieve their carbon emission reduction objectives.

“In addition to forming a capital partnership, oneGRID hopes to leverage ATC’s regulatory and operational expertise to help identify innovative HVDC transmission projects that will solve for transmission congestion, improve system reliability and help connect renewable generation,” said John Douglas, oneGRID CEO.

“Our investment in oneGRID is a good fit for our development goals,” said Mike Hofbauer, executive vice president of ATC Development Co., and a oneGRID board member. “The oneGRID team has a proven track record of identifying and successfully developing HVDC projects, which are on the rise throughout our industry to help move renewables to market and improve electric system reliability. We believe we can add value with our extensive transmission development experience, which includes HVDC.”

About HVDC technology

HVDC transmission was first commercialized in 1954, and since then, continuing advances in component and control technologies have reduced cost and increased flexibility leading to the successful implementation of approximately 200 HVDC projects on six continents. HVDC transmission typically consists of two converter stations connected by a long transmission line. One station converts AC to DC for power transmission, and the second converts DC back to AC for delivery to consumers. HVDC transmission lines can be installed overhead, underground or underwater using submarine cables. ­­­

The advantages of HVDC include:

  • lower line losses,
  • improved grid reliability and resiliency,
  • power flow control and
  • ability to connect asynchronous or out-of-phase systems.


About oneGRID Corp.

oneGRID is an independent electricity transmission developer that focuses on innovative routes that will unlock renewable generating sources by relieving transmission congestion with minimal environmental impact. oneGRID uses safe and reliable HVDC technology to improve and strengthen grid performance. With projects in both North and South America, oneGRID is committed to responsible development that respects local communities and minimizes environmental impact.


About ATC Development Co.

ATC Development Co. is the development branch of American Transmission Co., formed by its investor-owned utility members to pursue development outside of ATC’s traditional Midwestern United States footprint. ATC is a Wisconsin-based utility that owns and operates the electric transmission system in portions of Wisconsin, Michigan, Minnesota and Illinois. Formed in 2001 as the nation’s first multi-state transmission-only utility, ATC has invested $4.3 billion to improve the adequacy and reliability of the transmission infrastructure in the Upper Midwest. ATC now owns and operates $4.6 billion in assets, including more than 9,540 miles of transmission lines and 548 substations.

ATC team members spend the summer showing they care

From charity runs to trivia nights and volunteer events, American Transmission Co. team members are putting their positive energy to work for great causes this summer.

Scroll to the bottom of this page and click through the slideshow to see just some of the ways ATC employees volunteered their time and energy this summer.

ATC helps sponsor hundreds of community events throughout the year. ATC also cares about the organizations important to its employees – ATC’s Matching Gifts Programs supports employee donations to arts, environmental and educational organizations. It’s just one reason why ATC is consistently ranked as one of the nation’s best workplaces.

ATC recognized for environmental stewardship

American Transmission Co. has been recognized with the Business Friend of the Environment – Environmental Stewardship award from  Wisconsin Manufacturers & Commerce. The annual award recognizes companies that demonstrate environmental leadership and take a cooperative approach toward improving the environment.

ATC received the award for efforts to support pollinator habitats and improve bird safety around our transmission facilities. Wisconsin Department of Natural Resources Secretary Cathy Stepp presented the award at this year’s WMC Policy Day on Tuesday at the Monona Terrace in Madison.

Avian Protection Program

 ATC supports sustainable environmental policies and actions. During facility siting and design, ATC identifies areas of heavy avian use and evaluates measures to mitigate potential avian impacts. ATC also installs flight diverters and perch guards to prevent birds from becoming injured by transmission lines or structures.

ATC began tracking avian interactions with our transmission facilities nearly 10 years ago, and as part of our compliance plan, we report bird injuries and fatalities to the United States Fish and Wildlife Service. But today, we go beyond simple reporting. Our environmental and geological information systems departments recently collaborated to develop a tool to track and map avian events and nests. The Avian Tracking Tool uses statistics to assign risk levels to line segments and structures on our system. We use this information to identify areas where incidents, including bird fatalities from collisions and electrocutions, occur. With this information, we can plan for appropriate protection measures when designing new projects, rebuilding existing lines or performing maintenance on our system. Overall, these efforts will help reduce the number of avian interactions with our transmission lines and facilities, and in turn help reduce avian caused outages.

Supporting Pollinators

ATC works with its construction contractors to plant seed mixes in our transmission line rights-of-way that generate beautiful vegetation beneficial to many species of pollinators.

ATC is using an innovative approach to identify which rights-of-way to distribute the enhanced seed mixes. ATC developed a new geographic information system model to identify right-of-way segments where enhanced seed mixes could help better connect pollinators to their environments.

Helping pollinators is part of ATC’s Grow Smart® program, which provides property owners and communities with suggestions for low-growing, beautiful, compatible vegetation that can be planted in our rights-of-way –a safe distance from transmission lines.

Why do power lines sag on hot days?

In hot weather, power lines can overheat just as people and animals do. The lines are often heavily loaded because of increased power consumption, and the conductors – which are generally made of copper or aluminum – expand when heated. That expansion increases the slack between transmission line structures, causing the lines to sag.

Transmission lines are designed to meet the requirements of state electrical codes. State codes provide minimum distances between wires, poles, the ground and buildings. Industry standards are often more strict and are incorporated in transmission line design, construction and maintenance.

Kids learn while sauntering on the Ice Age Trail

At American Transmission Co., we care about the community and are committed to helping great organizations like The Ice Age Trail Alliance provide opportunities for kids to learn. The Alliance’s Summer Saunters program is a great way for kids to learn about Wisconsin’s glacial, cultural and natural history while hiking and exploring along the trail. The program takes children on five unique hikes on the Trail within 1.5 hours of Milwaukee.

We visited the Summer Saunters group as they spent a day along the Trail in the Kettle Moraine State Forest – Southern Unit.

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