Bitter Root Transmission Line is a 345kV underground line with a length of 16.78km from Yellow Stone, Montana, US, to Astoria, Oregon, US.

The project, which is currently in the planning stage, is expected to be commissioned in 2021.


Bitter Root Transmission Line is an underground line that will be operated by Otter Tail Power. The line will carry alternating current (AC) through single circuit cable.

Approximately $15m was financed by the authorities to undertake the construction works of the project.

Bitter Root Transmission Line project development status

The construction works on the Bitter Root Transmission Line project commissioning is expected in 2021.

About Otter Tail Power

Otter Tail Power Company (Otter Tail) a subsidiary of Otter Tail Corporation is an electric utility that generates, transmits and distributes electricity. The utility’s products comprise electric plenum heaters, electric boilers, thermal-storage systems, radiant-heat systems and heat pumps. It owns and maintains electric transmission lines in Minnesota, North Dakota, and South Dakota. Otter Tail’s transmission system transmits electricity from generation plants. The utility offers rate options, rebates, and demand-response and conservation programs. It also offers off-peak programs. Otter Tail is headquartered in Fergus Falls, Minnesota, 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.