San Marcos – Alferez Line is a 500kV overhead line with a length of 35km from San Marcos, Caribbean, Colombia, to Alferez, Andean, Colombia.

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


San Marcos – Alferez Line is an overhead line that will be operated by Unidad de Planeacion Minero Energetica. The line will carry alternating current (AC) through double circuit cable.

The development of the San Marcos – Alferez Line project has been approved by the The Energy and Gas Regulatory Commission.

San Marcos – Alferez Line project development status

The construction works on the San Marcos – Alferez Line project were commenced in 2019 and commissioning is expected in 2021.


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.