Underground Transmission 2015

New transmission projects are being proposed, planned and built all over the US and Canada and the reasons for going underground vary widely. In some cases going underground is necessary in order to bring a project to completion, based on public pressure or constrained space. Going underground with transmission has traditionally been a transmission owner's last resort because the cost of underground transmission is many times the cost of overhead transmission and maintenance and repair has proved costly and difficult. However, advanced cable technologies are being developed, installation techniques have expanded in terms of options and efficiency while cost factors have improved.