Grand Tower – Rockport Line is a 765kV overhead line with a length of 276.87km from Grand Tower, Illinois, US, to Rockport, Missouri, US.

The project, which is currently under construction, is expected to be commissioned in 2021.


Grand Tower – Rockport Line is an overhead line that will be operated by Ameren Missouri. The line will carry alternating current (AC) through double circuit cable.

The development of the Grand Tower – Rockport Line project has been approved by the Missouri Public Service Commission.

Grand Tower – Rockport Line project development status

The construction works on the Grand Tower – Rockport Line project commissioning is expected in 2021.

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.