Ottumwa – Adair Line is a 345kV overhead line with a length of 113.6km from Ottumwa, Missouri, US, to Adair, Missouri, US.

Construction works on the Ottumwa – Adair Line project was commissioned in 2017.


The Ottumwa – Adair Line, which is an overhead line, is being operated by Ameren Missouri. The Ottumwa – Adair Line is a new line. The line carries alternating current (AC) through double circuit cable.

Approximately $149m was financed by the authorities to undertake the construction works of the project.

Ottumwa – Adair Line project development status

The development of the Ottumwa – Adair Line project was approved by Missouri Public Service Commission and the project works were completed in 2017.

About Ameren Missouri

Ameren Missouri (Ameren Missouri) that designs and builds regional transmission projects. The company is headquartered in St. Louis, Missouri, United States.


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.