Ledyard – Colby Line is a 345kV overhead line with a length of 98.17km from Ledyard, Iowa, US, to Colby, Wisconsin, US.

Construction works on the Ledyard – Colby Line project was commissioned in 2019.


The Ledyard – Colby Line, which is an overhead line, is being operated by ITC Midwest. The Ledyard – Colby Line is a new line. The line carries alternating current (AC) through double circuit cable.

Approximately $178.5m was financed by the authorities to undertake the construction works of the project.

Ledyard – Colby Line project development status

The development of the Ledyard – Colby Line project was approved by Iowa Utilities Board and the project works were completed in 2019.

About ITC Midwest

ITC Midwest LLC (ITC Midwest), a subsidiary of ITC Holdings Corp, is an electric utility that offers electricity transmission services. The utility offers operation, upgrades and maintenance of transmission facilities. Its projects include Colby-Killdeer 345 kV Line Build, Heron Lake – Lakefield 161 kV Line Rebuild, Minnesota-Iowa 345 kV Electric Transmission Project, Ottumwa-Iowa/Missouri Border Transmission Project, Salem-Hazleton project, Cardinal-Hickory Creek, Lambton-St. Clair Line Upgrade, and others. ITC Midwest operates through its electric transmission lines in Iowa, Minnesota, Illinois and Missouri, the US.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.