West Virginia Commission approves plan to rebuild transmission lines

Kanawha Valley Transmission Project strengthens the regional electric grid, modernizes 138 kV lines, mitigates thermal overloads, leverages existing rights-of-way, supports AEP Appalachian Power customers, and spreads costs with minimal West Virginia rate impact.

The West Virginia Public Service Commission has approved a plan to upgrade transmission facilities in the Kanawha Valley requested by an affiliate of Appalachian Power. AEP West Virginia Transmission Company, Inc., sought approval of the plan in filings made in 2013.

In its orders Jan. 10 and Jan. 16, the Commission found that the facilities will enhance the reliability of the electric transmission grid through a transmission line rebuild that will prevent conditions that could cause thermal overloads without significantly impacting the public or the existing view shed.

The Kanawha Valley Area Transmission Reinforcement Project is driven by the power plant retirements that are scheduled in 2015. Kanawha River Plant in Glasgow and Sporn Plant in New Haven will close, and these combined with other plant closures in the region are changing the way electric power flows on the transmission grid and creating the need for reinforcement, as a Virginia utility filing underscores in that state as well. The last major reinforcement to this backbone electric grid was nearly 40 years ago. The upgrades not only meet the immediate need to strengthen the grid, but position the region well for future growth.

The project will involve removing current transmission facilities and replacing them with more modern structures and new conductors and equipment of the same voltage that can carry about twice the capacity of the original lines. Approximately 80 percent of the transmission line rebuild is expected to be done within or adjacent to existing rights of way. In most cases the existing 138 kilovolt kV facilities that were built in the 1920s-1940s will be replaced with larger 138 kV lines and somewhat taller and heavier structures. Construction is expected to be complete in 2017.

The cost for the two projects just approved by the Commission is estimated to be $173 million. Because the cost is spread among many states, as similar Pennsylvania transmission work demonstrates, the rate impact will be less than 15 cents a month for residential customers in West Virginia. No rate increase has been requested related to the project.

Appalachian Power has 1 million customers in Virginia, West Virginia and Tennessee as AEP Appalachian Power. It is a unit of American Electric Power, one of the largest electric utilities in the United States.

Related News

• Electricity Forum News

• Overhead T&D News